Univest Financial (UVSP) 10-K 9 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	UNIVEST CORP OF PENNSYLVANIA
Entity Central Index Key	102212
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	UVSP
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		20,060,088
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$323,018,636

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$31,995	$32,646
Interest-earning deposits with other banks	6,570	36,523
Investment securities held-to-maturity (fair value $54,765 and $66,853 at December 31, 2014 and 2013, respectively)	54,347	66,003
Investment securities available-for-sale	314,283	336,281
Loans held for sale	3,302	2,267
Loans and leases held for investment	1,626,625	1,541,484
Less: Reserve for loan and lease losses	-20,662	-24,494
Net loans and leases held for investment	1,605,963	1,516,990
Premises and equipment, net	37,009	34,129
Goodwill	67,717	57,517
Other intangibles, net of accumulated amortization and fair value adjustments of $11,776 and $10,300 at December 31, 2014 and 2013, respectively	12,180	8,178
Bank owned life insurance	62,265	60,637
Accrued interest receivable and other assets	39,690	40,388
Total assets	2,235,321	2,191,559
LIABILITIES
Noninterest-bearing deposits	449,339	411,714
Interest-bearing deposits:
Demand deposits	640,095	625,845
Savings deposits	519,314	536,150
Time deposits	252,593	270,789
Total deposits	1,861,341	1,844,498
Customer repurchase agreements	41,974	37,256
Accrued interest payable and other liabilities	47,452	29,299
Total liabilities	1,950,767	1,911,053
SHAREHOLDERS’ EQUITY
Common stock, $5 par value: 48,000,000 shares authorized at December 31, 2014 and 2013; 18,266,404 shares issued at December 31, 2014 and 2013; 16,221,607 and 16,287,812 shares outstanding at December 30, 2014 and 2013, respectively	91,332	91,332
Additional paid-in capital	62,980	62,417
Retained earnings	181,851	172,602
Accumulated other comprehensive loss, net of tax benefit	-14,462	-9,955
Treasury stock, at cost; 2,044,797 and 1,978,592 shares at December 31, 2014 and 2013, respectively	-37,147	-35,890
Total shareholders’ equity	284,554	280,506
Total liabilities and shareholders’ equity	$2,235,321	$2,191,559

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Securities Held-to-Maturity, Fair Value	$54,765	$66,853
Accumulated amortization and fair value adjustments on other intangibles	$11,776	$10,300
Common stock, par value	$5	$5
Common stock, shares authorized	48,000,000	48,000,000
Common stock, shares issued	18,266,404	18,266,404
Common stock, shares outstanding	16,221,607	16,287,812
Treasury stock, shares	2,044,797	1,978,592

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and fees on loans and leases:
Taxable	$62,521	$63,173	$65,479
Exempt from federal income taxes	5,684	4,777	4,725
Total interest and fees on loans and leases	68,205	67,950	70,204
Interest and dividends on investment securities:
Taxable	3,989	5,432	5,951
Exempt from federal income taxes	3,610	4,071	4,335
Other interest income	81	126	164
Total interest income	75,885	77,579	80,654
Interest expense
Interest on demand deposits	545	478	686
Interest on savings deposits	317	313	790
Interest on time deposits	3,102	3,795	5,162
Interest on short-term borrowings	32	48	326
Interest on long-term borrowings	0	483	1,210
Total interest expense	3,996	5,117	8,174
Net interest income	71,889	72,462	72,480
Provision for loan and lease losses	3,607	11,228	10,035
Net interest income after provision for loan and lease losses	68,282	61,234	62,445
Noninterest income
Trust fee income	7,835	7,303	6,777
Service charges on deposit accounts	4,230	4,451	4,429
Investment advisory commission and fee income	11,904	7,642	6,128
Insurance commission and fee income	11,543	9,395	7,766
Other service fee income	7,189	7,390	5,855
Bank owned life insurance income	1,628	2,968	2,670
Other-than-temporary impairment on equity securities	0	0	-13
Net gain on sales of investment securities	635	3,389	305
Net gain on mortgage banking activities	2,182	4,523	6,088
Net gain (loss) on sales and dispositions of fixed assets	40	-6	1,257
Net gain (loss) on sales and write-downs of other real estate owned	195	626	-1,904
Loss on termination of interest rate swap	0	-1,866	0
Other	1,270	969	902
Total noninterest income	48,651	46,784	40,260
Noninterest expense
Salaries and benefits	42,245	39,522	37,306
Commissions	7,637	8,512	6,981
Net occupancy	7,023	5,869	5,716
Equipment	5,645	4,865	4,486
Professional fees	3,164	3,471	2,702
Marketing and advertising	1,880	1,948	1,725
Deposit insurance premiums	1,561	1,553	1,689
Intangible expenses	2,167	157	899
Acquisition-related costs	1,270	87	36
Restructuring and integration charges	8	534	0
Other	14,654	14,615	14,742
Total noninterest expense	87,254	81,133	76,282
Income before income taxes	29,679	26,885	26,423
Income taxes	7,448	5,696	5,551
Net income	$22,231	$21,189	$20,872
Net income per share:
Basic (in dollars per share)	$1.37	$1.28	$1.25
Diluted (in dollars per share)	$1.36	$1.27	$1.24
Dividends declared	$0.80	$0.80	$0.80

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Income before income taxes	$29,679	$26,885	$26,423
Net unrealized gains (losses) on available-for-sale investment securities, Before Tax Amount
Net unrealized holding gains (losses) arising during the period, Before Tax Amount	5,532	-11,712	1,888
Less: reclassification adjustment for net gains on sales realized in net income, Before Tax Amount	-635	-3,389	-305
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income, Before Tax Amount	0	0	13
Total net unrealized gains (losses) on available-for-sale investment securities, Before Tax Amount	4,897	-15,101	1,596
Cash flow hedge derivative, Before Tax Amount
Net change in fair value of interest rate swap, Before Tax Amount	-241	43	-474
Less: reclassification adjustment for loss on termination of interest rate swap realized in net income, Before Tax Amount	0	1,866	0
Total cash flow hedge derivative, Before Tax Amount	-241	1,909	-474
Defined benefit pension plans, Before Tax Amount
Net unrealized (losses) gains arising during the period, Before Tax Amount	-11,968	7,496	-3,297
Less: amortization of net actuarial loss included in net periodic pension costs, Before Tax Amount	666	1,282	1,170
Less: accretion of prior service cost included in net periodic pension costs, Before Tax Amount	-288	-255	-255
Total defined benefit pension plans, Before Tax Amount	-11,590	8,523	-2,382
Other comprehensive income (loss), Before Tax Amount	-6,934	-4,669	-1,260
Total comprehensive income (loss), Before Tax Amount	22,745	22,216	25,163
Income taxes	7,448	5,696	5,551
Net unrealized gains (losses) on available-for-sale investment securities, Tax Expense (Benefit)
Net unrealized holding gains (losses) arising during the period, Tax Expense (Benefit)	1,936	-4,099	660
Less: reclassification adjustment for net gains on sales realized in net income, Tax Expense (Benefit)	-222	-1,186	-107
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income, Tax Expense (Benefit)	0	0	5
Total net unrealized gains (losses) on available-for-sale investment securities, Tax Expense (Benefit)	1,714	-5,285	558
Cash flow hedge derivative, Tax Expense (Benefit)
Net change in fair value of interest rate swap, Tax Expense (Benefit)	-84	15	-165
Less: reclassification adjustment for loss on termination of interest rate swap realized in net income, Tax Expense (Benefit)	0	653	0
Total cash flow hedge derivative, Tax Expense (Benefit)	-84	668	-165
Defined benefit pension plans, Tax Expense (Benefit)
Net unrealized (losses) gains arising during the period, Tax Expense (Benefit)	-4,189	2,623	-1,154
Less: amortization of net actuarial loss included in net periodic pension costs, Tax Expense (Benefit)	233	449	409
Less: accretion of prior service cost included in net periodic pension costs, Tax Expense (Benefit)	-101	-89	-89
Total defined benefit pension plans, Tax Expense (Benefit)	-4,057	2,983	-834
Other comprehensive income (loss), Tax Expense (Benefit)	-2,427	-1,634	-441
Total comprehensive income (loss), Tax Expense (Benefit)	5,021	4,062	5,110
Net income	22,231	21,189	20,872
Net unrealized gains (losses) on available-for-sale investment securities, Net of Tax Amount
Net unrealized holding gains (losses) arising during the period, Net of Tax Amount	3,596	-7,613	1,228
Less: reclassification adjustment for net gains on sales realized in net income, Net of Tax Amount	-413	-2,203	-198
Less: reclassification adjustment for other-than-temporary impairment on equity securities realized in net income, Net of Tax Amount	0	0	8
Total net unrealized gains (losses) on available-for-sale investment securities, Net of Tax Amount	3,183	-9,816	1,038
Cash flow hedge derivative, Net of Tax Amount
Net change in fair value of interest rate swap, Net of Tax Amount	-157	28	-309
Less: reclassification adjustment for loss on termination of interest rate swap realized in net income, Net of Tax Amount	0	1,213	0
Total cash flow hedge derivative, Net of Tax Amount	-157	1,241	-309
Defined benefit pension plans, Net of Tax Amount
Net unrealized (losses) gains arising during the period, Net of Tax Amount	-7,779	4,873	-2,143
Less: amortization of net actuarial loss included in net periodic pension costs, Net of Tax Amount	433	833	761
Less: accretion of prior service cost included in net periodic pension costs, Net of Tax Amount	-187	-166	-166
Total defined benefit pension plans, Net of Tax Amount	-7,533	5,540	-1,548
Other comprehensive income (loss), Net of Tax Amount	-4,507	-3,035	-819
Total comprehensive income (loss), Net of Tax Amount	$17,724	$18,154	$20,053

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]
In Thousands, except Share data, unless otherwise specified
Beginning balance at Dec. 31, 2011	$272,979	$91,332	$58,495	$157,566	($6,101)	($28,313)
Beginning balance, shares at Dec. 31, 2011		16,702,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,872	0	0	20,872	0	0
Other comprehensive loss, net of income tax benefit	-819	0	0	0	-819	0
Cash dividends declared ($0.80 per share)	-13,411	0	0	-13,411	0	0
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,515	0	0	-70	0	2,585
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares		150,579
Exercise of stock options, shares	0
Repurchase of cancelled restricted stock awards	0	0	300	0	0	-300
Repurchase of cancelled restricted stock awards, shares		-13,125
Stock-based compensation	4,544	0	4,544	0	0	0
Net tax deficiency on stock-based compensation	-84	0	-84	0	0	0
Purchases of treasury stock	-2,319	0	0	0	0	-2,319
Purchases of treasury stock, shares		-140,755
Restricted stock awards granted	0	0	-1,154	-134	0	1,288
Restricted stock awards granted, shares		71,157
Ending balance at Dec. 31, 2012	284,277	91,332	62,101	164,823	-6,920	-27,059
Ending balance, shares at Dec. 31, 2012		16,770,232
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,189	0	0	21,189	0	0
Other comprehensive loss, net of income tax benefit	-3,035	0	0	0	-3,035	0
Cash dividends declared ($0.80 per share)	-13,286	0	0	-13,286	0	0
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,422	0	20	-32	0	2,434
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares		132,681
Exercise of stock options, shares	0
Repurchase of cancelled restricted stock awards	0	0	519	0	0	-519
Repurchase of cancelled restricted stock awards, shares		-29,533
Stock-based compensation	978	0	978	0	0	0
Net tax deficiency on stock-based compensation	-27	0	-27	0	0	0
Purchases of treasury stock	-12,012	0	0	0	0	-12,012
Purchases of treasury stock, shares		-655,609
Restricted stock awards granted	0	0	-1,174	-92	0	1,266
Restricted stock awards granted, shares		70,041
Ending balance at Dec. 31, 2013	280,506	91,332	62,417	172,602	-9,955	-35,890
Ending balance, shares at Dec. 31, 2013		16,287,812
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,231	0	0	22,231	0	0
Other comprehensive loss, net of income tax benefit	-4,507	0	0	0	-4,507	0
Cash dividends declared ($0.80 per share)	-12,982	0	0	-12,982	0	0
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,462	0	43	0	0	2,419
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs, shares		124,151
Exercise of stock options	310	0	-5	0	0	315
Exercise of stock options, shares	17,334	17,334
Repurchase of cancelled restricted stock awards	0	0	735	0	0	-735
Repurchase of cancelled restricted stock awards, shares		-43,452
Stock-based compensation	1,141	0	1,141	0	0	0
Net tax deficiency on stock-based compensation	-2	0	-2	0	0	0
Purchases of treasury stock	-4,605	0	0	0	0	-4,605
Purchases of treasury stock, shares		-238,542
Restricted stock awards granted	0	0	-1,349	0	0	1,349
Restricted stock awards granted, shares		74,304
Ending balance at Dec. 31, 2014	$284,554	$91,332	$62,980	$181,851	($14,462)	($37,147)
Ending balance, shares at Dec. 31, 2014	16,221,607	16,221,607

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, per share	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.80	$0.80	$0.80

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$22,231	$21,189	$20,872
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	3,607	11,228	10,035
Depreciation of premises and equipment	3,243	2,927	2,903
Other-than-temporary impairment of equity securities	0	0	13
Net gain on sales of investment securities	-635	-3,389	-305
Net gain on mortgage banking activities	-2,182	-4,523	-6,088
Net (gain) loss on sales and dispositions of fixed assets	-40	6	-1,257
Net (gain) loss on sales and write-down of other real estate owned	-195	-626	1,904
Loss on termination of interest rate swap	0	1,866	0
Bank owned life insurance income	-1,628	-2,968	-2,670
Net amortization on investment securities	1,690	2,729	2,470
Amortization, fair market value adjustments and capitalization of mortgage servicing rights	10	-1,367	-1,413
Stock-based compensation	1,141	978	1,267
Intangible expenses	2,167	157	899
Other adjustments to reconcile net income to cash provided by operating activities	-587	-252	0
Deferred tax expense	4,162	933	2,540
Originations of loans held for sale	-131,461	-265,732	-325,569
Proceeds from the sale of loans held for sale	132,278	273,665	329,569
Contributions to pension and other postretirement benefit plans	-254	-2,243	-8,215
(Increase) decrease in accrued interest receivable and other assets	-1,093	-2,873	8,065
(Decrease) increase in accrued interest payable and other liabilities	-587	1,101	2,119
Net cash provided by operating activities	31,867	32,806	37,139
Cash flows from investing activities:
Net cash paid due to acquisitions	-9,260	-2,170	-3,225
Net capital expenditures	-5,595	-3,840	-578
Proceeds from maturities and calls of securities held-to-maturity	11,000	3,000	0
Proceeds from maturities and calls of securities available-for-sale	58,744	85,205	164,943
Proceeds from sales of securities available-for-sale	32,967	76,361	57,186
Purchases of investment securities held-to-maturity	0	0	-24,697
Purchases of investment securities available-for-sale	-65,215	-81,712	-226,429
Proceeds from sale of credit card portfolio	8,940	0	0
Net increase in loans and leases	-100,981	-74,338	-50,615
Net decrease in interest-earning deposits	30,070	11,190	19,807
Proceeds from sales of other real estate owned	891	4,359	3,012
Proceeds from bank owned life insurance	0	3,540	2,415
Net cash (used in) provided by investing activities	-38,439	21,595	-58,181
Cash flows from financing activities:
Net increase (decrease) in deposits	16,843	-20,515	116,101
Net increase (decrease) in short-term borrowings	4,217	-59,026	-18,458
Repayment of subordinated debt	0	-375	-1,500
Payment for repurchase of trust preferred securities	0	-20,619	0
Payment of contingent consideration on acquisitions	-310	0	0
Purchases of treasury stock	-4,605	-12,012	-2,319
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,462	2,422	2,515
Proceeds from exercise of stock options	310	0	0
Cash dividends paid	-12,996	-10,029	-16,755
Net cash provided by (used in) financing activities	5,921	-120,154	79,584
Net (decrease) increase in cash and due from banks	-651	-65,753	58,542
Cash and due from banks at beginning of year	32,646	98,399	39,857
Cash and due from banks at end of period	31,995	32,646	98,399
Supplemental disclosures of cash flow information:
Cash paid for interest	4,118	5,997	8,701
Cash paid for income taxes, net of refunds received	5,899	5,352	1,819
Non cash transactions:
Transfer of loans to other real estate owned	0	3,485	0
Transfer of loans to loans held for sale	8,926	0	2,599
Contingent consideration recorded as goodwill	$6,105	$454	$842

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies
	Organization
	Univest Corporation of Pennsylvania (the Corporation) through its wholly owned subsidiary, Univest Bank and Trust Co. (the Bank), is engaged in domestic commercial and retail banking services and provides a full range of community banking and trust services to its customers. The Bank wholly owns Univest Capital, Inc., which provides lease financing, and Delview, Inc., who through its subsidiaries, Univest Investments, Inc., Univest Insurance, Inc. and Girard Partners provides financial planning, investment management, investment advisory, insurance products and brokerage services. Univest Investments, Inc., Univest Insurance, Inc. and Univest Capital, Inc. were formed to enhance the traditional banking and trust services provided by the Bank, along with the acquisition of Girard Partners.
	At December 31, 2014, the Corporation has three reportable business segments: Banking, Wealth Management and Insurance. The Corporation determines its segments based primarily upon product and service offerings, through the types of income generated and the regulatory environment. This is strategically how the Corporation operates and has positioned itself in the marketplace. Accordingly, significant operating decisions are based upon analysis of each of these segments. At December 31, 2014, these segments meet the quantitative thresholds for separate disclosure as a business segment. For more detailed discussion and financial information on the business segments, see Note 23 “Segment Reporting”.
	The Bank serves Montgomery, Bucks and Chester Counties and the Lehigh Valley of Pennsylvania through thirty-one banking offices and provides banking and trust services to the residents and employees of twelve retirement communities. With the acquisition of Valley Green Bank effective January 1, 2015, the Bank operates three full-service banking offices in the greater Philadelphia marketplace. Banking services are also available on-line at the Corporation’s website at www.univest.net.
	Principles of Consolidation
	The consolidated financial statements include the accounts of the Corporation and its wholly owned subsidiaries; the Corporation’s primary subsidiary is the Bank. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current-year presentation.
	Use of Estimates
	The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes include fair value measurement of investment securities available-for-sale and assessment for impairment of certain investment securities, reserve for loan and lease losses, valuation of goodwill and other intangible assets, mortgage servicing rights, deferred tax assets and liabilities, benefit plans and stock-based compensation expense.
	Interest-earning Deposits with Other Banks
	Interest-earning deposits with other banks consist of deposit accounts with other financial institutions generally having maturities of three months or less.
	Investment Securities
	Securities are classified as investment securities held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Securities purchased with the intention of recognizing short-term profits are placed in the trading account and are carried at fair value. The Corporation did not have any trading account securities at December 31, 2014 or 2013. Securities not classified as held-to-maturity or trading are designated securities available-for-sale and carried at fair value with unrealized gains and losses reflected in other comprehensive income, net of estimated income taxes. Realized gains and losses on the sale of investment securities are recognized using the specific identification method and are included in the consolidated statements of income. The amortization of premiums and accretion of discounts are included in interest income and calculated using the level yield method.
	Management evaluates debt securities, which are comprised of U.S. government, government sponsored agencies, municipalities, corporate bonds and other issuers, for other-than-temporary impairment by considering the current economic conditions, the length of time and the extent to which the fair value has been less than cost, interest rates and the bond rating of each security. All of the debt securities are rated as investment grade and management believes that it will not incur any losses. The unrealized losses on the Corporation’s investments in debt securities are temporary in nature since they are primarily related to market interest rates and are not related to the underlying credit quality of the issuers within our investment portfolio. The Corporation does not have the intent to sell the debt securities and believes it is more likely than not, that it will not have to sell the securities before recovery of their cost basis. The credit portion of any loss on debt securities is recognized through earnings and the noncredit portion of any loss related to debt securities that the Corporation does not intend to sell, and it is more likely than not that the Corporation will not be required to sell the securities prior to recovery, is recognized in other comprehensive income, net of tax.
	The Corporation evaluates its equity securities for other-than-temporary impairment and recognizes other-than-temporary impairment charges when it has determined that it is probable that the fair value of certain equity securities will not recover to the Corporation’s cost basis in the individual securities within a reasonable period of time due to a decline in the financial stability of the underlying companies. Management evaluates the near-term prospects of the issuers in relation to the severity and duration of the impairment. The Corporation has the intent and ability to hold these securities until recovery of the Corporation’s cost basis occurs.
	Loans and Leases
	Loans and leases are stated at the principal amount less net deferred fees and unearned discount. Interest income on commercial, consumer, and mortgage loans is recorded on the outstanding balance method, using actual interest rates applied to daily principal balances. Loan commitments are made to accommodate the financial needs of the customers. These commitments represent off-balance sheet items that are unfunded. Accrual of interest income on loans and leases ceases when collectability of interest and/or principal is questionable. If it is determined that the collection of interest previously accrued is uncertain, such accrual is reversed and charged to current earnings. Loans and leases are considered past due based upon failure to comply with contractual terms.
	A loan or lease is typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest, even though the loan or lease is currently performing. When a loan or lease, including a loan or lease that is impaired, is classified as nonaccrual, the accrual of interest on such a loan or lease is discontinued. A loan or lease may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan or lease is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest payments received on nonaccrual loans and leases are either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Loans and leases are usually restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. A loan or lease is considered impaired when, based on current information and events, it is probable that the Corporation will be unable to collect all amounts due, including principal and interest, according to the contractual terms of the loan agreement. Interest on impaired loans and leases, which are not classified as nonaccrual, is recognized on the accrual basis.
	Loan and Lease Fees
	Fees collected upon loan or lease origination and certain direct costs of originating loans and leases are deferred and recognized over the contractual lives of the related loans and leases as yield adjustments using the interest method. Upon prepayment or other disposition of the underlying loans and leases before their contractual maturities, any associated unearned fees or unamortized costs are recognized.
	Reserve for Loan and Lease Losses
	The reserve for loan and lease losses is maintained at a level that management believes is appropriate to absorb known and inherent losses in the loan and lease portfolio. Management’s methodology to determine the adequacy of and the additions to the reserve considers specific credit reviews, past loan and lease loss experience, current economic conditions and trends, and the volume, growth, and composition of the loan portfolio.
	The reserve for loan and lease loss analysis takes into consideration the growth of the loan and lease portfolio, the status of past-due loans and leases, current economic conditions, various types of lending activity, policies, real estate and other loan commitments, and significant changes in charge-off activity. Impaired loans, including nonaccrual loans and leases, troubled debt restructured loans and other accruing impaired loans are evaluated individually. All other loans and leases are evaluated as pools. Based on historical loss experience and qualitative factors, loss factors are determined giving consideration to the areas noted in the first paragraph and applied to the pooled loan and lease categories to develop the general or allocated portion of the reserve.
	The reserve for loan and lease losses is determined at the end of each quarter, and more frequently for management review purposes. Calculating the Corporation's reserve for loan and lease losses considers the Bank's loan portfolio utilizing historical loss data as a starting point, while evaluating the impact of environmental factors in a quantitative manner as they relate to the collectability of outstanding loan obligations. The Corporation utilizes a rolling eight-quarter migration analysis and loss emergence period analysis to determine the annualized net expected loan loss experience.
	Each quarter, the conditions that exist within the look-back period are compared to current conditions to support a conclusion as to which qualitative adjustments are (or are not) deemed necessary for each loan portfolio segment. These factors are evaluated subjectively based on management's experience and supported by the Corporation's defined analytical metrics/drivers relative to the historical look-back period. Factors include, but are not limited to, asset quality trends, portfolio growth trends, changes in lending policies and management, economic trends, concentrations of credit risk and the impact of collateral dependent lending.
	The reserve for loan and lease losses is based on management’s evaluation of the loan and lease portfolio under current economic conditions and such other factors, which deserve recognition in estimating loan and lease losses. This evaluation is inherently subjective, as it requires estimates including the amounts and timing of future cash flows expected to be received on impaired loans and leases that may be susceptible to significant change. Additions to the reserve arise from the provision for loan and lease losses charged to operations or from the recovery of amounts previously charged off. Loan and lease charge-offs reduce the reserve. Loans and leases are charged off when there has been permanent impairment or when in the opinion of management the full amount of the loan or lease will not be realized. Certain impaired loans are reported at the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent, or for certain impaired loans, at the present value of expected future cash flows using the loan’s initial effective interest rate. For commercial impaired loans which are collateral dependent, the fair value of collateral is based on appraisals performed by qualified licensed appraisers hired by the Corporation less management’s estimated costs to sell. Appraisals are updated annually and obtained more frequently if changes in the property or market conditions warrant. Once an updated appraisal is received, if the fair value less estimated costs to sell is less than the carrying amount of the collateral dependent loan, a charge-off to the reserve for loan and lease losses is recorded for the difference.
	The reserve for loan and lease losses consists of an allocated reserve and an unallocated reserve. The allocated reserve is comprised of reserves established on specific loans and leases, and class reserves based on historical loan and lease loss experience and qualitative factors, current trends, and management assessments. The unallocated reserve supports other risk considerations not readily quantifiable through the allocated reserve metrics outlined above, as well as the inherent imprecision of the reserve for loan and lease losses model complexity. These considerations include, but are not limited to, fair value instability within the non-performing category, and the improving credit risk profile of performing loans individually measured for impairment.
	The specific reserve element is based on a regular analysis of impaired commercial and real estate loans. For these loans, the specific reserve established is based on an analysis of related collateral value, cash flow considerations and, if applicable, guarantor capacity.
	The class reserve element is determined by an internal loan and lease grading process in conjunction with associated allowance factors. The Corporation revises the class allowance factors whenever necessary, but no less than quarterly, in order to address improving or deteriorating credit quality trends or specific risks associated with a given loan or lease pool classification.
	The Corporation maintains a reserve in other liabilities for off-balance sheet credit exposures that currently are unfunded in categories with historical loss experience. In addition, the Bank's primary examiner, as a regular part of their examination process, may require the Bank to increase the level of reserves.
	Premises and Equipment
	Land is stated at cost, and premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method and charged to operating expenses over the estimated useful lives of the assets. The estimated useful life for new buildings constructed on land owned is forty years, and for new buildings constructed on leased land, is the lesser of forty years or the lease term including anticipated renewable terms. The useful life of purchased existing buildings is the estimated remaining useful life at the time of the purchase. Land improvements are considered to have estimated useful lives of fifteen years or the lease term including anticipated renewable terms. Furniture, fixtures and equipment have estimated useful lives ranging from three to ten years.
	Goodwill and Other Intangible Assets
	The Corporation accounts for its acquisitions using the purchase accounting method. Purchase accounting requires the total purchase price to be allocated to the estimated fair values of assets acquired and liabilities assumed, including certain intangible assets that must be recognized. Typically, this allocation results in the purchase price exceeding the fair value of net assets acquired, which is recorded as goodwill. Core deposit intangibles are a measure of the value of checking, money market and savings deposits acquired in business combinations accounted for under the purchase method. Core deposit intangibles and other identified intangibles with finite useful lives are amortized using the sum of the year’s digits over their estimated useful lives of up to fifteen years. Customer related intangibles are amortized over their estimated useful lives of five to twelve years. Covenants not to compete are amortized over their three to five-year contractual lives. The Corporation completes a goodwill analysis at least on an annual basis or more often if events and circumstances indicate that there may be impairment. The Corporation also completes an impairment test for other intangible assets on an annual basis or more often if events and circumstances indicate a possible impairment. There can be no assurance that future impairment analyses will not result in a charge to earnings.
	Mortgage servicing rights are recognized as separate assets when mortgage loans are sold and the servicing rights are retained. Capitalized mortgage servicing rights are reported in other intangible assets on the consolidated balance sheets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing period of the underlying mortgage loans. Mortgage servicing rights are evaluated for impairment, on a quarterly basis, based upon the fair value of the servicing rights as compared to amortized cost. The Corporation estimates the fair value of mortgage servicing rights using discounted cash flow models that calculate the present value of estimated future net servicing income. The model uses readily available prepayment speed assumptions for the current interest rates of the portfolios serviced. Mortgage servicing rights are carried at the lower of amortized cost or estimated fair value. Impairment is recognized through a valuation allowance, to the extent that fair value is less than the unamortized capitalized amount.
	Bank Owned Life Insurance
	The Corporation carries bank owned life insurance at the net cash surrender value of the policies. Changes in the net cash surrender value of these policies are reflected in noninterest income. Proceeds from and purchases of bank owned life insurance are reflected in the consolidated statements of cash flows under investing activities. The Corporation recognizes a liability for the future death benefit for certain endorsement split-dollar life insurance arrangements that provide an employee with a death benefit in a postretirement/termination period.
	Other Real Estate Owned
	Other real estate owned represents properties acquired through customers’ loan defaults and is included in other assets. The real estate is stated at an amount equal to the loan balance prior to foreclosure, plus costs incurred for improvements to the property, but no more than the fair value of the property, less estimated costs to sell. Any write-down, at or prior to the dates the real estate is considered foreclosed, is charged to the allowance for loan losses. Subsequent write‑downs and any gain or loss upon the sale of real estate owned is recorded in other noninterest income. Expenses incurred in connection with holding such assets are recorded in other noninterest expense.
	Derivative Financial Instruments
	The Corporation recognizes all derivative financial instruments on its balance sheet at fair value. Derivatives that are not hedges must be adjusted to fair value through income. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative are either offset against the change in fair value of the hedged assets, liabilities, or firm commitments through earnings, or recognized in other comprehensive income until the underlying forecasted transaction is recognized in earnings. The ineffective portion of a derivative's change in fair value is recognized in earnings immediately. To determine fair value, the Corporation uses third party pricing models that incorporate assumptions about market conditions and risks that are current at the reporting date.
	The Corporation may use interest-rate swap agreements to modify interest rate characteristics from variable to fixed or fixed to variable in order to reduce the impact of interest rate changes on future net interest income. The Corporation accounts for its interest-rate swap contracts in cash flow hedging relationships by establishing and documenting the effectiveness of the instrument in offsetting the change in cash flows of assets or liabilities that are being hedged. To determine effectiveness, the Corporation performs an analysis to identify if changes in fair value or cash flow of the derivative correlate to the equivalent changes in the forecasted interest receipts related to a specified hedged item. Recorded amounts related to interest-rate swaps are included in other assets or liabilities. The change in fair value of the ineffective part of the instrument would need to be charged to earnings, potentially causing material fluctuations in reported earnings in the period of the change relative to comparable periods. In a fair value hedge, the fair values of the interest rate swap agreements and changes in the fair values of the hedged items are recorded in the Corporation’s consolidated balance sheet with the corresponding gain or loss being recognized in the consolidated statement of income. The difference between changes in the fair values of interest rate swap agreements and the hedged items represents hedge ineffectiveness and is recorded in net interest income in the consolidated statement of income. The Corporation performs an assessment, both at the inception of the hedge and quarterly thereafter, to determine whether these derivatives are highly effective in offsetting changes in the value of the hedged items.
	In connection with its mortgage banking activities, the Corporation enters into commitments to originate certain fixed-rate residential mortgage loans for customers, also referred to as interest rate locks. In addition, the Corporation enters into forward commitments for the future sale or purchase of mortgage loans to or from third-party investors to hedge the effect of changes in interest rates on the value of the interest rate locks. Forward loan sale commitments may also be in the form of commitments to sell individual mortgage loans at a fixed price at a future date. Both the interest rate locks and the forward loan sale commitments are accounted for as derivatives and carried at fair value, determined as the amount that would be necessary to settle each derivative financial instrument at the balance sheet date. Gross derivative assets and liabilities are recorded within other assets and other liabilities on the consolidated balance sheets, with changes in fair value during the period recorded within the net gain on mortgage banking activities on the consolidated statements of income.
	Federal Home Loan Bank Stock, Federal Reserve Bank Stock and Certain Other Investments without Readily Determinable Fair Values
	Federal Home Loan Bank stock, Federal Reserve Bank stock and certain other investments without readily determinable fair values are classified as other assets on the consolidated balance sheets. These investments are carried at cost and evaluated for impairment periodically or if events or circumstances indicate that there may be impairment.
	Income Taxes
	There are two components of income tax expense: current and deferred. Current income tax expense approximates cash to be paid or refunded for taxes for the applicable period. Deferred income taxes are provided for temporary differences between amounts reported for financial statement and tax purposes. Deferred income taxes are computed using the asset and liability method, such that deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between financial reporting amounts and the tax basis of existing assets and liabilities based on currently enacted tax laws and tax rates in effect for the periods in which the differences are expected to reverse. Deferred tax assets are subject to management’s judgment based upon available evidence that future realizations are “more likely than not.” If management determines that the Corporation is not more likely than not, to realize some or all of the net deferred tax asset in the future, a charge to income tax expense may be required to reduce the value of the net deferred tax asset to the expected realizable value. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Penalties are recorded in noninterest expense in the year they are assessed and paid and are treated as a non-deductible expense for tax purposes. Interest is recorded in noninterest expense in the year it is assessed and paid and is treated as a deductible expense for tax purposes.
	Retirement Plans and Other Postretirement Benefits
	Substantially all employees who were hired before December 8, 2009 are covered by a noncontributory retirement plan. Effective December 31, 2009, the benefits previously accrued under the noncontributory retirement plan were frozen and the plan was amended and converted to a cash balance plan, with participants not losing any pension benefits already earned in the plan. Prior to the cash balance plan conversion effective December 31, 2009, the plan provided benefits based on a formula of each participant’s final average pay. Future benefits under the cash balance plan accrue by crediting participants annually with an amount equal to a percentage of earnings in that year based on years of credited service as defined in the plan. Employees hired on or after December 8, 2009 are not eligible to participate in the noncontributory retirement plan. The Corporation also provides supplemental executive retirement benefits, a portion of which is in excess of limits imposed on qualified plans by federal tax law. These plans are non-qualified benefit plans. The Corporation provides certain postretirement healthcare and life insurance benefits for retired employees. The Corporation’s measurement date for plan assets and obligation is fiscal year-end. The Corporation recognizes on its consolidated balance sheet the funded status of its defined pension plans and changes in the funded status of the plan in the year in which the changes occur. An under-funded position would create a liability and an over-funded position would create an asset, with a correlating deferred tax asset or liability. The net impact would be an adjustment to equity as accumulated other comprehensive income (loss). The Corporation recognizes as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
	The Corporation sponsors a 401(k) deferred salary savings plan, which is a qualified defined contribution plan, and which covers all employees of the Corporation and its subsidiaries, and provides that the Corporation make matching contributions as defined by the plan.
	The Corporation sponsors a Supplemental Non-Qualified Pension Plan (SNQPP) which was established in 1981 for employees who have served for several years, with ability and distinction, in one of the primary policy-making senior level positions, with the understanding that the future growth and continued success of the Corporation’s business may well reflect the continued services to be rendered by these employees and the Corporation’s desire to be reasonably assured that these employees would continue to serve. The SNQPP was established prior to the existence of a 401(k) deferred salary savings, employee stock purchase and long-term incentive plans and therefore is not actively offered to new participants. These non-qualified plans are accounted for under guidance for deferred compensation arrangements.
	Stock-Based Compensation
	The fair value of share based awards is recognized as compensation expense over the vesting period based on the grant-date fair value of the awards. The Corporation uses the Black-Scholes Model to estimate the fair value of each option on the date of grant. The Black-Scholes Model estimates the fair value of employee stock options using a pricing model which takes into consideration the exercise price of the option, the expected life of the option, the current market price and its expected volatility, the expected dividends on the stock and the current risk-free interest rate for the expected life of the option. The Corporation grants stock options to employees with an exercise price equal to the fair value of the shares at the date of grant. The Corporation grants both fixed and variable (performance-based) restricted stock. The performance-based restricted stock awards vest based upon the Corporation’s performance against selected peers with respect to certain financial measures over a three-year period. The fair value of fixed restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period. The fair value of the performance-based restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period adjusted for a probability factor of achieving the performance goals.
	Dividend Reinvestment and Employee Stock Purchase Plans
	The Univest Dividend Reinvestment Plan allows for the issuance of 1,968,750 shares of common stock. During 2014 and 2013, 82,922 and 95,639 shares, respectively, were issued under the dividend reinvestment plan, with 552,181 shares available for future purchase at December 31, 2014.
	The 1996 Employee Stock Purchase Plan allows for the issuance of 984,375 shares of common stock. Employees may elect to make contributions to the plan in an aggregate amount not less than 2% or more than 10% of such employee’s total compensation. These contributions are then used to purchase stock during an offering period determined by the Corporation’s Employee Stock Purchase Plan Committee. The purchase price of the stock is 90% of the closing sale price on the last trading day of each quarter. Compensation expense is recognized as the discount is greater than 5% of the fair value. During 2014 and 2013, 23,271 and 20,195 shares, respectively, were issued under the employee stock purchase plan, with 732,624 shares available for future purchase at December 31, 2014.
	Marketing and Advertising Costs
	The Corporation’s accounting policy is to expense marketing and advertising costs as incurred, when the advertisement first takes place, or over the expected useful life of the related asset, as would be the case with billboards.
	Statement of Cash Flows
	The Corporation has defined those items included in the caption “Cash and due from banks” as cash and cash equivalents.
	Trust Assets
	Assets held by the Corporation in a fiduciary or agency capacity for its customers are not included in the consolidated financial statements since such items are not assets of the Corporation.
	Earnings per Share
	Basic earnings per share represent income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if options on common shares had been exercised, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Corporation relate solely to outstanding stock options, and are determined using the treasury stock method. The effects of options to issue common stock are excluded from the computation of diluted earnings per share in periods in which the effect would be antidilutive.
Recent Accounting Pronouncements
In May 2014, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) regarding revenue from contracts with customers which clarifies the principles for recognizing revenue and develops a common standard for U.S. GAAP and International Financial Reporting Standards. The ASU establishes a core principle that would require an entity to identify the contract(s) with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract and recognize revenue when (or as) the entity satisfies a performance obligation. The ASU provides for improved disclosure requirements that require entities to disclose sufficient information that enables users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016, or January 1, 2017 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on its financial statements; however, it is anticipated the impact will be only related to timing.
In January 2014, the FASB issued an ASU regarding reclassification of residential real estate collateralized consumer mortgage loans upon foreclosure. The ASU clarifies that when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The ASU was issued to eliminate diversity in practice on this topic. The amendment is effective for fiscal years and interim periods within those years beginning after December 15, 2014, or January 1, 2015 for the Corporation. The Corporation does not anticipate the adoption of this guidance will have a material impact on its financial statements but will result in expanded disclosures effective March 31, 2015.

Restrictions_on_Cash_and_Due_f

Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts	Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts
	The Bank maintains reserve balances under Federal Reserve Bank requirements. The reserve requirement at December 31, 2014 and 2013 was $2.5 million and $8.3 million, respectively, and was satisfied by vault cash held at the Bank’s branches. The average balances at the Federal Reserve Bank of Philadelphia were $31.5 million and $44.5 million for the years ended December 31, 2014 and 2013, respectively.
	The Corporation also maintains interest-earning deposit accounts at other financial institutions as collateral for Risk Participation Agreements. The pledging requirement at December 31, 2014 and 2013 was $370 thousand and $690 thousand, respectively. See Note 16, “Commitments and Contingencies” for additional information.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	Acquisitions
	Sterner Insurance Associates
	On July 1, 2014, the Corporation and its insurance subsidiary, Univest Insurance, completed the acquisition of Sterner Insurance Associates, a full service firm providing insurance and consultative risk management solutions to individuals and businesses throughout the Lehigh Valley, Berks, Bucks and Montgomery counties.
	The Corporation paid $3.9 million in cash and assumed liabilities of $940 thousand at closing with additional contingent consideration to be paid in annual installments over the three-year period ending June 30, 2017, based on the achievement of certain levels of revenue growth and EBITDA (earnings before interest, taxes, depreciation and amortization). At the acquisition date, the Corporation recorded the estimated fair value of the contingent consideration of $635 thousand in other liabilities. The potential cash payments that could result from the contingent consideration arrangement range from $0 to a maximum of $5.7 million cumulative over the next three years. As a result of the Sterner Insurance acquisition, the Corporation recorded goodwill of $3.4 million (inclusive of the contingent consideration) and customer related intangibles of $1.6 million. The goodwill is expected to be deductible for tax purposes. The customer related intangibles are being amortized over nine years using the sum-of-the-years-digits amortization method.
	Valley Green Bank
	On June 17, 2014, the Corporation, the Bank and Valley Green Bank entered into an Agreement and Plan of Merger which provided for the merger of Valley Green Bank with and into the Bank in an all-stock transaction with an aggregate value of approximately $78.9 million . On January 1, 2015, the Corporation completed its acquisition of Valley Green Bank. See Note 26, "Subsequent Event" for additional information. The transaction qualifies as a tax-free reorganization for federal income tax purposes. The transaction is anticipated to be accretive to the Corporation’s earnings per share in the first combined year of operations.
	Headquartered in the Mt. Airy neighborhood of Philadelphia, Pennsylvania, Valley Green Bank had approximately $425 million in assets, $386 million in loans, and $385 million in deposits at December 31, 2014 and operated three full-service banking offices and two administrative offices for loan production in the greater Philadelphia marketplace. With the assumption of Valley Green Bank's three branches and two administrative offices for loan production in the Philadelphia marketplace, the Corporation entered a new small business and consumer market and expanded its existing lending network within southeastern Pennsylvania.
	Girard Partners
	On January 27, 2014, the Corporation completed the acquisition of Girard Partners, a registered investment advisory firm with more than $500 million in assets under management. The Corporation increased its assets under management to over $3.0 billion at the acquisition date and expanded its advisory capabilities.
	The Corporation paid $5.4 million in cash at closing with additional contingent consideration to be paid in annual installments over the five-year period ending December 31, 2018, based on the achievement of certain levels of EBITDA. As of the effective date of the acquisition, January 1, 2014, the Corporation recorded the estimated fair value of the contingent consideration of $5.5 million in other liabilities. The potential cash payments that could result from the contingent consideration arrangement range from $0 to a maximum of $14.5 million cumulative over the next 5 years. As a result of the Girard Partners acquisition, the Corporation recorded goodwill of $6.8 million (inclusive of the contingent consideration) and customer related intangibles of $4.3 million. The goodwill is expected to be deductible for tax purposes. The customer related intangibles are being amortized over 9 years using the sum-of-the-years-digits amortization method.

Investment_Securities

Investment Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities
	The following table shows the amortized cost and the estimated fair value of the held-to-maturity securities and available-for-sale securities at December 31, 2014 and 2013, by contractual maturity within each type:
		At December 31, 2014											At December 31, 2013
	(Dollars in thousands)	Amortized		Gross			Gross			Fair Value			Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized						Cost		Unrealized			Unrealized
				Gains			Losses								Gains			Losses
	Securities Held-to-Maturity
	Corporate bonds:
	Within 1 year	$	13,088	$	82		$	—		$	13,170		$	11,148	$	122		$	—		$	11,270
	After 1 year to 5 years	41,259		388			(52		)	41,595			54,855		992			(264		)	55,583
		54,347		470			(52		)	54,765			66,003		1,114			(264		)	66,853
	Total	$	54,347	$	470		$	(52	)	$	54,765		$	66,003	$	1,114		$	(264	)	$	66,853
	Securities Available-for-Sale
	U.S. treasuries:
	After 1 year to 5 years	$	4,972	$	—		$	(127	)	$	4,845		$	—	$	—		$	—		$	—
	After 5 years to 10 years	—		—			—			—			4,966		—			(258		)	4,708
		4,972		—			(127		)	4,845			4,966		—			(258		)	4,708
	U.S. government corporations and agencies:
	Within 1 year	—		—			—			—			5,999		16			—			6,015
	After 1 year to 5 years	122,328		48			(532		)	121,844			112,989		114			(1,226		)	111,877
	After 5 years to 10 years	—		—			—			—			10,816		—			(560		)	10,256
		122,328		48			(532		)	121,844			129,804		130			(1,786		)	128,148
	State and political subdivisions:
	Within 1 year	600		2			—			602			1,564		13			—			1,577
	After 1 year to 5 years	12,326		17			(59		)	12,284			5,305		14			(29		)	5,290
	After 5 years to 10 years	49,554		1,616			(77		)	51,093			41,974		710			(698		)	41,986
	Over 10 years	37,004		1,792			(1		)	38,795			57,899		1,227			(322		)	58,804
		99,484		3,427			(137		)	102,774			106,742		1,964			(1,049		)	107,657
	Residential mortgage-backed securities:
	After 1 year to 5 years	5,066		17			—			5,083			—		—			—			—
	After 5 years to 10 years	4,856		—			(32		)	4,824			10,008		5			(53		)	9,960
	Over 10 years	3,661		75			—			3,736			25,721		20			(221		)	25,520
		13,583		92			(32		)	13,643			35,729		25			(274		)	35,480
	Collateralized mortgage obligations:
	After 1 year to 5 years	—		—			—			—			73		—			—			73
	Over 10 years	3,810		—			(85		)	3,725			7,341		40			(253		)	7,128
		3,810		—			(85		)	3,725			7,414		40			(253		)	7,201
	Corporate bonds:
	Within 1 year	4,998		22			—			5,020			—		—			—			—
	After 1 year to 5 years	29,505		88			(244		)	29,349			18,838		52			(411		)	18,479
	After 5 years to 10 years	20,442		—			(371		)	20,071			16,474		4			(1,117		)	15,361
		54,945		110			(615		)	54,440			35,312		56			(1,528		)	33,840
	Money market mutual funds:
	No stated maturity	11,675		—			—			11,675			16,900		—			—			16,900
		11,675		—			—			11,675			16,900		—			—			16,900
	Equity securities:
	No stated maturity	854		483			—			1,337			1,679		668			—			2,347
		854		483			—			1,337			1,679		668			—			2,347
	Total	$	311,651	$	4,160		$	(1,528	)	$	314,283		$	338,546	$	2,883		$	(5,148	)	$	336,281
	Expected maturities may differ from contractual maturities because debt issuers may have the right to call or prepay obligations without call or prepayment penalties. Unrealized losses in investment securities at December 31, 2014 and 2013 do not represent other-than-temporary impairments.
	Securities with a carrying value of $230.9 million and $271.1 million at December 31, 2014 and 2013, respectively, were pledged to secure public deposits and for other purposes as required by law.
	The following table presents information related to sales of securities available-for-sale during the years ended December 31, 2014, 2013 and 2012:
		For the Years Ended December 31,
	(Dollars in thousands)	2014		2013			2012
	Securities available-for-sale:
	Proceeds from sales	$	32,967	$	76,361		$	57,186
	Gross realized gains on sales	635		3,396			1,201
	Gross realized losses on sales	—		7			896
	Tax expense related to net realized gains on sales	222		1,186			107
	At December 31, 2014 and 2013, there were no investments in any single non-federal issuer representing more than 10% of shareholders’ equity.
	The following table shows the fair value of securities that were in an unrealized loss position at December 31, 2014 and 2013 by the length of time those securities were in a continuous loss position:
		Less than					Twelve Months						Total
		Twelve Months					or Longer
	(Dollars in thousands)	Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
Losses				Losses						Losses
At December 31, 2014
Securities Held-to-Maturity
Corporate bonds	$	15,036	$	(27	)	$	4,987		$	(25	)	$	20,023	$	(52	)
Total	$	15,036	$	(27	)	$	4,987		$	(25	)	$	20,023	$	(52	)
Securities Available-for-Sale
U.S. treasuries	$	—	$	—		$	4,845		$	(127	)	$	4,845	$	(127	)
U.S. government corporations and agencies	39,607		(80		)	62,140			(452		)	101,747		(532		)
State and political subdivisions	10,246		(31		)	9,303			(106		)	19,549		(137		)
Residential mortgage-backed securities	4,824		(32		)	—			—			4,824		(32		)
Collateralized mortgage obligations	—		—			3,725			(85		)	3,725		(85		)
Corporate bonds	21,949		(328		)	15,805			(287		)	37,754		(615		)
Total	$	76,626	$	(471	)	$	95,818		$	(1,057	)	$	172,444	$	(1,528	)
At December 31, 2013
Securities Held-to-Maturity
Corporate bonds	$	19,942	$	(264	)	$	—		$	—		$	19,942	$	(264	)
Total	$	19,942	$	(264	)	$	—		$	—		$	19,942	$	(264	)
Securities Available-for-Sale
U.S. treasuries	$	4,708	$	(258	)	$	—		$	—		$	4,708	$	(258	)
U.S. government corporations and agencies	101,813		(1,786		)	—			—			101,813		(1,786		)
State and political subdivisions	30,233		(1,049		)	—			—			30,233		(1,049		)
Residential mortgage-backed securities	29,444		(274		)	—			—			29,444		(274		)
Collateralized mortgage obligations	4,091		(253		)	—			—			4,091		(253		)
Corporate bonds	26,557		(1,528		)	—			—			26,557		(1,528		)
Total	$	196,846	$	(5,148	)	$	—		$	—		$	196,846	$	(5,148	)

Loans_and_Leases

Loans and Leases	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans and Leases	Loans and Leases
	Summary of Major Loan and Lease Categories
		At December 31,
	(Dollars in thousands)	2014				2013
	Commercial, financial and agricultural	$	457,827			$	422,816
	Real estate-commercial	628,478				600,353
	Real estate-construction	79,887				90,493
	Real estate-residential secured for business purpose	36,932				37,319
	Real estate-residential secured for personal purpose	166,850				149,164
	Real estate-home equity secured for personal purpose	108,250				95,345
	Loans to individuals	29,941				40,000
	Lease financings	118,460				105,994
	Total loans and leases held for investment, net of deferred income	$	1,626,625			$	1,541,484
	Unearned lease income, included in the above table	$	(14,131	)		$	(14,439	)
	Net deferred costs, included in the above table	3,218				2,744
	Overdraft deposits included in the above table	50				62
	Overdraft deposits are re-classified as loans and are included in the total loans and leases on the balance sheet.
	The Corporation is a lessor of primarily equipment under agreements expiring at various dates through the year 2021.
	At December 31, 2014 and 2013, the schedule of minimum lease payments receivable is as follows:
		At December 31,
	(Dollars in thousands)	2014				2013
	Within 1 year	$	50,340			$	43,911
	After 1 year through 2 years	38,084				33,302
	After 2 years through 3 years	25,888				23,723
	After 3 years through 4 years	13,667				14,335
	After 4 years through 5 years	4,312				4,983
	Thereafter	300				179
	Total future minimum lease payments receivable	132,591				120,433
	Less: Unearned income	(14,131		)		(14,439		)
	Total lease financing receivables, net of unearned income	$	118,460			$	105,994
	Age Analysis of Past Due Loans and Leases
	The following presents, by class of loans and leases, an aging of past due loans and leases, loans and leases which are current and the recorded investment in loans and leases 90 days or more past due which are accruing interest at December 31, 2014 and 2013:
	(Dollars in thousands)	30-59				60-89				90 Days				Total				Current				Total Loans				Recorded
		Days				Days				or more				Past Due								and Leases				Investment 90
		Past Due				Past Due				Past Due												Held for				Days or more
																						Investment				Past Due and
																										Accruing
																										Interest
	At December 31, 2014
	Commercial, financial and agricultural	$	145			$	747			$	2,567			$	3,459			$	454,368			$	457,827			$	—
	Real estate—commercial real estate and construction:
	Commercial real estate	361				913				1,163				2,437				626,041				628,478				—
	Construction	—				405				5,525				5,930				73,957				79,887				—
	Real estate—residential and home equity:
	Residential secured for business purpose	167				56				713				936				35,996				36,932				—
	Residential secured for personal purpose	409				604				60				1,073				165,777				166,850				—
	Home equity secured for personal purpose	348				—				215				563				107,687				108,250				31
	Loans to individuals	365				65				365				795				29,146				29,941				365
	Lease financings	1,610				406				435				2,451				116,009				118,460				55
	Total	$	3,405			$	3,196			$	11,043			$	17,644			$	1,608,981			$	1,626,625			$	451
	At December 31, 2013
	Commercial, financial and agricultural	$	386			$	922			$	2,904			$	4,212			$	418,604			$	422,816			$	12
	Real estate—commercial real estate and construction:
	Commercial real estate	148				262				4,932				5,342				595,011				600,353				—
	Construction	—				—				8,742				8,742				81,751				90,493				—
	Real estate—residential and home equity:
	Residential secured for business purpose	87				276				161				524				36,795				37,319				—
	Residential secured for personal purpose	1,370				—				617				1,987				147,177				149,164				—
	Home equity secured for personal purpose	278				97				100				475				94,870				95,345				23
	Loans to individuals	445				193				319				957				39,043				40,000				319
	Lease financings	2,182				455				389				3,026				102,968				105,994				59
	Total	$	4,896			$	2,205			$	18,164			$	25,265			$	1,516,219			$	1,541,484			$	413
	Non-Performing Loans and Leases
	The following presents, by class of loans and leases, non-performing loans and leases at December 31, 2014 and 2013:
	At December 31,
	2014																2013
(Dollars in thousands)	Nonaccrual				Accruing				Loans and				Total Non-				Nonaccrual				Accruing				Loans and				Total Non-
	Loans and				Troubled				Leases				Performing				Loans and				Troubled				Leases				Performing
	Leases*				Debt				90 Days				Loans and				Leases*				Debt				90 Days				Loans and
					Restructured				or more				Leases								Restructured				or more				Leases
					Loans and				Past Due												Loans and				Past Due
					Lease				and												Lease				and
					Modifications				Accruing												Modifications				Accruing
									Interest																Interest
Commercial, financial and agricultural	$	5,002			$	2,851			$	—			$	7,853			$	4,253			$	1,329			$	12			$	5,594
Real estate—commercial real estate and construction:
Commercial real estate	4,413				2,618				—				7,031				8,091				4,271				—				12,362
Construction	5,931				—				—				5,931				9,159				2,307				—				11,466
Real estate—residential and home equity:
Residential secured for business purpose	915				—				—				915				224				—				—				224
Residential secured for personal purpose	512				—				—				512				1,101				—				—				1,101
Home equity secured for personal purpose	184				—				31				215				77				—				23				100
Loans to individuals	—				—				365				365				—				36				319				355
Lease financings	380				—				55				435				330				—				59				389
Total	$	17,337			$	5,469			$	451			$	23,257			$	23,235			$	7,943			$	413			$	31,591
* Includes nonaccrual troubled debt restructured loans and lease modifications of $3.1 million and $1.6 million at December 31, 2014 and December 31, 2013, respectively.
Credit Quality Indicators
The following tables present by class, the recorded investment in loans and leases held for investment by credit quality indicator at December 31, 2014 and 2013.
The Corporation employs a ten (10) grade risk rating system related to the credit quality of commercial loans and residential real estate loans secured for a business purpose of which the first six categories are pass categories (credits not adversely rated). The following is a description of the internal risk ratings and the likelihood of loss related to each risk rating. Loans with risk ratings of one through five are reviewed based on the relationship dollar amount with the borrower: loans with a relationship total of $2.5 million or greater are reviewed quarterly; loans with a relationship balance of less than $2.5 million but greater than $500 thousand are reviewed annually based on the borrower’s fiscal year; loans with a relationship balance of less than $500 thousand are reviewed only if the loan becomes 60 days or more past due. Loans with risk ratings of six are also reviewed based on the relationship dollar amount with the borrower: loans with a relationship balance of $2.0 million or greater are reviewed quarterly; loans with a relationship balance of less than $2.0 million but greater than $500 thousand are reviewed annually; loans with a relationship balance of less than $500 thousand are reviewed only if the loan becomes 60 days or more past due. Loans with risk ratings of seven are reviewed at least quarterly, and as often as monthly, at management’s discretion. Loans with risk ratings of eight through ten are reviewed monthly.
1	Cash Secured—No credit risk
2	Fully Secured—Negligible credit risk
3	Strong—Minimal credit risk
4	Satisfactory—Nominal credit risk
5	Acceptable—Moderate credit risk
6	Pre-Watch—Marginal, but stable credit risk
7	Special Mention—Potential weakness
8	Substandard—Well-defined weakness
9	Doubtful—Collection in-full improbable
10	Loss—Considered uncollectible
Commercial Credit Exposure Credit Risk by Internally Assigned Grades
(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Total
	Financial and				Commercial				Construction				Residential Secured
	Agricultural												for Business Purpose
At December 31, 2014
Grade:
1. Cash secured/ 2. Fully secured	$	4,248			$	—			$	1,262			$	—			$	5,510
3. Strong	14,013				8,504				3,897				—				26,414
4. Satisfactory	23,931				30,587				8,731				339				63,588
5. Acceptable	301,425				402,719				55,111				24,535				783,790
6. Pre-watch	65,993				123,129				4,956				5,384				199,462
7. Special Mention	7,166				17,505				—				1,304				25,975
8. Substandard	41,051				46,034				5,930				5,370				98,385
9. Doubtful	—				—				—				—				—
10.Loss	—				—				—				—				—
Total	$	457,827			$	628,478			$	79,887			$	36,932			$	1,203,124
At December 31, 2013
Grade:
1. Cash secured/ 2. Fully secured	4,763				2,014				1,682				—				8,459
3. Strong	6,051				8,515				4,300				—				18,866
4. Satisfactory	34,650				17,758				1,500				261				54,169
5. Acceptable	251,203				384,061				54,464				26,694				716,422
6. Pre-watch	84,201				113,181				16,084				5,884				219,350
7. Special Mention	10,095				19,445				—				1,841				31,381
8. Substandard	31,508				55,331				12,463				2,639				101,941
9. Doubtful	345				48				—				—				393
10.Loss	—				—				—				—				—
Total	$	422,816			$	600,353			$	90,493			$	37,319			$	1,150,981
Credit Exposure—Real Estate—Residential Secured for Personal Purpose, Real Estate—Home Equity Secured for Personal Purpose, Loans to Individuals, Lease Financing Credit Risk Profile by Payment Activity
The Corporation monitors the credit risk profile by payment activity for the following classifications of loans and leases: residential real estate loans secured for a personal purpose, home equity loans secured for a personal purpose, loans to individuals and lease financings. Nonperforming loans and leases are loans past due 90 days or more, loans and leases on nonaccrual of interest and troubled debt restructured loans and lease modifications. Performing loans and leases are reviewed only if the loan becomes 60 days or more past due. Nonperforming loans and leases are reviewed monthly. Performing loans and leases have a nominal to moderate risk of loss. Nonperforming loans and leases are loans or leases with a well-defined weakness and where collection in-full is improbable.
(Dollars in thousands)	Real Estate—				Real Estate—				Loans to				Lease				Total
	Residential				Home Equity				Individuals				Financing
	Secured for				Secured for
	Personal Purpose				Personal Purpose
At December 31, 2014
Performing	$	166,338			$	108,035			$	29,576			$	118,025			$	421,974
Nonperforming	512				215				365				435				1,527
Total	$	166,850			$	108,250			$	29,941			$	118,460			$	423,501
At December 31, 2013
Performing	$	148,063			$	95,245			$	39,645			$	105,605			$	388,558
Nonperforming	1,101				100				355				389				1,945
Total	$	149,164			$	95,345			$	40,000			$	105,994			$	390,503
Risks associated with lending activities include, among other things, the impact of changes in interest rates and economic conditions, which may adversely impact the ability of borrowers to repay outstanding loans, and impact the value of the associated collateral.
Commercial, financial and agricultural loans, commercial real estate loans, construction loans and residential real estate loans with a business purpose are generally perceived as having more risk of default than residential real estate loans with a personal purpose and consumer loans. These types of loans involve larger loan balances to a single borrower or groups of related borrowers. Commercial real estate loans may be affected to a greater extent than residential loans by adverse conditions in real estate markets or the economy because commercial real estate borrowers’ ability to repay their loans depends on successful development of their properties and factors affecting residential real estate borrowers.
Commercial, financial and agricultural business loans are typically based on the borrowers’ ability to repay the loans from the cash flow of their businesses. These loans may involve greater risk because the availability of funds to repay each loan depends substantially on the success of the business itself. In addition, the collateral securing the loans often depreciates over time, is difficult to appraise and liquidate and fluctuates in value based on the success of the business.
Risk of loss on a construction loan depends largely upon whether our initial estimate of the property’s value at completion of construction equals or exceeds the cost of the property construction (including interest). During the construction phase, a number of factors can result in delays and cost overruns. If estimates of value are inaccurate or if actual construction costs exceed estimates, the value of the property securing the loan may be insufficient to ensure full repayment when completed through a permanent loan or by seizure of collateral. Included in real estate-construction is track development financing. Risk factors related to track development financing include the demand for residential housing and the real estate valuation market. When projects move slower than anticipated, the properties may have significantly lower values than when the original underwriting was completed, resulting in lower collateral values to support the loan. Extended time frames also cause the interest carrying cost for a project to be higher than the builder projected, negatively impacting the builder’s profit and cash flow and, therefore, their ability to make principal and interest payments.
Commercial real estate loans and residential real estate loans with a business purpose secured by owner-occupied properties are dependent upon the successful operation of the borrower’s business. If the operating company suffers difficulties in terms of sales volume and/or profitability, the borrower’s ability to repay the loan may be impaired. Loans secured by properties where repayment is dependent upon payment of rent by third party tenants or the sale of the property may be impacted by loss of tenants, lower lease rates needed to attract new tenants or the inability to sell a completed project in a timely fashion and at a profit.
Commercial, financial and agricultural loans, commercial real estate loans, construction loans and residential real estate loans secured for a business purpose are more susceptible to a risk of loss during a downturn in the business cycle. The Corporation has strict underwriting, review, and monitoring procedures in place, however, these procedures cannot eliminate all of the risks related to these loans.
The Corporation focuses on both assessing the borrower’s capacity and willingness to repay and on obtaining sufficient collateral. Commercial, financial and agricultural loans are generally secured by the borrower’s assets and by personal guarantees. Commercial real estate and residential real estate loans secured for a business purpose are originated primarily within the Southeastern Pennsylvania market area at conservative loan-to-value ratios and often with a guarantee of the borrowers. Management closely monitors the composition and quality of the total commercial loan portfolio to ensure that any credit concentrations by borrower or industry are closely monitored.
The Corporation originates fixed-rate and adjustable-rate real estate-residential mortgage loans that are secured by the underlying 1- to 4-family residential properties for personal purposes. Credit risk exposure in this area of lending is minimized by the evaluation of the credit worthiness of the borrower, including debt-to-equity ratios, credit scores and adherence to underwriting policies that emphasize conservative loan-to-value ratios of generally no more than 80%. Residential mortgage loans granted in excess of the 80% loan-to-value ratio criterion are generally insured by private mortgage insurance.
In the real estate-home equity loan portfolio secured for a personal purpose, credit exposure is minimized by the evaluation of the creditworthiness of the borrower, including debt-to-equity ratios, credit scores and adherence to the Corporation’s underwriting policies. Combined loan-to-value ratios are generally limited to 80%, but increased to 85% for the Corporation’s strongest profile borrower. Other credit considerations and compensating factors may warrant higher combined loan-to-value ratios.
Credit risk for direct consumer loans is controlled by strict adherence to conservative underwriting standards that consider debt-to-income levels and the creditworthiness of the borrower and, if secured, collateral values. These loans are included within the portfolio of loans to individuals.
The primary risks that are involved with lease financing receivables are credit underwriting and borrower industry concentrations. The Corporation has strict underwriting, review, and monitoring procedures in place to mitigate this risk. Risk also lies in the residual value of the underlying equipment. Residual values are subject to judgments as to the value of the underlying equipment that can be affected by changes in economic and market conditions and the financial viability of the residual guarantors and insurers. To the extent not guaranteed or assumed by a third party, or otherwise insured against, the Corporation bears the risk of ownership of the leased assets. This includes the risk that the actual value of the leased assets at the end of the lease term will be less than the residual value. The Corporation greatly reduces this risk primarily by using $1.00 buyout leases, in which the entire cost of the leased equipment is included in the contractual payments, leaving no residual payment at the end of the lease terms.
Reserve for Loan and Lease Losses and Recorded Investment in Loans and Leases
The following presents, by portfolio segment, a summary of the activity in the reserve for loan and lease losses for the years ended December 31, 2014, 2013 and 2012:
(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Loans to				Lease				Unallocated				Total
	Financial				Commercial				Residential				Residential				Individuals				Financings
	and				and				Secured for				and Home
	Agricultural				Construction				Business				Equity
									Purpose				Secured for
													Personal
													Purpose
For the Year Ended December 31, 2014
Reserve for loan and lease losses:
Beginning balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
Charge-offs	(2,834		)		(4,363		)		(140		)		(141		)		(796		)		(576		)		N/A				(8,850		)
Recoveries	247				524				60				34				265				281				N/A				1,411
Provision (recovery of provision)	(282		)		4,002				(219		)		(53		)		197				(5		)		(33		)		3,607
Ending balance	$	6,920			$	8,943			$	763			$	1,124			$	360			$	985			$	1,567			$	20,662
For the Year Ended December 31, 2013
Reserve for loan and lease losses:
Beginning balance	$	11,594			$	7,507			$	639			$	980			$	679			$	1,326			$	2,021			$	24,746
Charge-offs	(3,213		)		(8,667		)		(112		)		(195		)		(641		)		(791		)		N/A				(13,619		)
Recoveries	320				1,104				13				13				174				515				N/A				2,139
Provision (recovery of provision)	1,088				8,836				522				486				482				235				(421		)		11,228
Ending balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
For the Year Ended December 31, 2012
Reserve for loan and lease losses:
Beginning balance	$	11,262			$	13,317			$	823			$	735			$	730			$	1,344			$	1,659			$	29,870
Charge-offs *	(9,974		)		(4,803		)		—				(156		)		(578		)		(1,224		)		N/A				(16,735		)
Recoveries	484				334				60				7				130				561				N/A				1,576
Provision (recovery of provision)	9,822				(1,341		)		(244		)		394				397				645				362				10,035
Ending balance	$	11,594			$	7,507			$	639			$	980			$	679			$	1,326			$	2,021			$	24,746
* Includes charge-offs of $1.3 million on commercial real estate loans which were subsequently transferred to loans held for sale in 2012 and sold during 2012.
N/A – Not applicable
The following presents, by portfolio segment, the balance in the reserve for loan and lease losses disaggregated on the basis of impairment method and the recorded investment in loans and leases disaggregated on the basis of impairment method at December 31, 2014 and 2013:
(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Loans to				Lease				Unallocated				Total
	Financial				Commercial				Residential				Residential				Individuals				Financings
	and				and				Secured for				and Home
	Agricultural				Construction				Business				Equity
									Purpose				Secured for
													Personal
													Purpose
At December 31, 2014
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	$	920			$	78			$	—			$	—			$	—			$	—			N/A				$	998
Ending balance: collectively evaluated for impairment	6,000				8,865				763				1,124				360				985				1,567				19,664
Total ending balance	$	6,920			$	8,943			$	763			$	1,124			$	360			$	985			$	1,567			$	20,662
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	$	16,561			$	35,926			$	3,008			$	696			$	—			$	—							$	56,191
Ending balance: collectively evaluated for impairment	441,266				672,439				33,924				274,404				29,941				118,460								1,570,434
Total ending balance	$	457,827			$	708,365			$	36,932			$	275,100			$	29,941			$	118,460							$	1,626,625
At December 31, 2013
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	$	2,398			$	—			$	501			$	64			$	—			$	—			N/A				$	2,963
Ending balance: collectively evaluated for impairment	7,391				8,780				561				1,220				694				1,285				1,600				21,531
Total ending balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	$	14,105			$	41,240			$	1,774			$	1,178			$	36			$	—							$	58,333
Ending balance: collectively evaluated for impairment	408,711				649,606				35,545				243,331				39,964				105,994								1,483,151
Total ending balance	$	422,816			$	690,846			$	37,319			$	244,509			$	40,000			$	105,994							$	1,541,484
N/A – Not applicable
Impaired Loans
The following presents, by class of loans, the recorded investment and unpaid principal balance of impaired loans, the amounts of the impaired loans for which there is not an allowance for credit losses and the amounts for which there is an allowance for credit losses at December 31, 2014 and 2013:
	At December 31,
	2014												2013
(Dollars in thousands)	Recorded				Unpaid				Related				Recorded				Unpaid				Related
	Investment				Principal				Allowance				Investment				Principal				Allowance
					Balance												Balance
Impaired loans with no related allowance recorded:
Commercial, financial and agricultural	$	12,628			$	13,050							$	10,890			$	11,749
Real estate—commercial real estate	29,779				30,810								28,883				35,700
Real estate—construction	5,931				6,474								12,357				14,540
Real estate—residential secured for business purpose	3,008				3,044								224				235
Real estate—residential secured for personal purpose	512				547								131				131
Real estate—home equity secured for personal purpose	184				184								77				77
Loans to individuals	—				—								36				54
Total impaired loans with no related allowance recorded	$	52,042			$	54,109							$	52,598			$	62,486
Impaired loans with an allowance recorded:
Commercial, financial and agricultural	$	3,933			$	3,935			$	920			$	3,215			$	3,272			$	2,398
Real estate—commercial real estate	216				216				78				—				—				—
Real estate—residential secured for business purpose	—				—				—				1,550				1,550				501
Real estate—residential secured for personal purpose	—				—				—				970				976				64
Total impaired loans with an allowance recorded	$	4,149			$	4,151			$	998			$	5,735			$	5,798			$	2,963
Total impaired loans:
Commercial, financial and agricultural	$	16,561			$	16,985			$	920			$	14,105			$	15,021			$	2,398
Real estate—commercial real estate	29,995				31,026				78				28,883				35,700				—
Real estate—construction	5,931				6,474				—				12,357				14,540				—
Real estate—residential secured for business purpose	3,008				3,044				—				1,774				1,785				501
Real estate—residential secured for personal purpose	512				547				—				1,101				1,107				64
Real estate—home equity secured for personal purpose	184				184				—				77				77				—
Loans to individuals	—				—				—				36				54				—
Total impaired loans	$	56,191			$	58,260			$	998			$	58,333			$	68,284			$	2,963
Impaired loans includes nonaccrual loans and leases, accruing troubled debt restructured loans and lease modifications and other accruing impaired loans for which it is probable that not all principal and interest payments due will be collectible in accordance with the contractual terms. These loans are individually measured to determine the amount of potential impairment. The loans are reviewed for impairment based on the fair value of the collateral for collateral dependent loans and for certain loans based on discounted cash flows using the loans’ initial effective interest rates. Impaired loans included other accruing impaired loans of $33.8 million and $27.5 million at December 31, 2014 and 2013, respectively. Specific reserves on other accruing impaired loans were $476 thousand and $1.6 million at December 31, 2014 and 2013, respectively.
The following presents by class of loans, the average recorded investment in impaired loans and an analysis of interest on impaired loans. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. Therefore, interest income on accruing impaired loans is recognized using the accrual method.
	For the Years Ended December 31,
	2014												2013												2012
(Dollars in thousands)	Average				Interest				Additional				Average				Interest				Additional				Average				Interest				Additional
	Recorded				Income				Interest Income				Recorded				Income				Interest Income				Recorded				Income				Interest Income
	Investment				Recognized*				That Would				Investment				Recognized*				That Would				Investment				Recognized*				That Would
									Have Been												Have Been												Have Been
									Recognized												Recognized												Recognized
									Under Original												Under Original												Under Original
									Terms												Terms												Terms
Commercial, financial and agricultural	$	15,334			$	540			$	258			$	6,412			$	172			$	200			$	5,189			$	82			$	288
Real estate—commercial real estate	26,662				1,143				323				25,728				837				717				20,756				348				1,086
Real estate—construction	10,412				103				463				14,621				124				680				16,207				117				763
Real estate—residential secured for business purpose	2,524				77				61				672				19				10				156				—				7
Real estate—residential secured for personal purpose	719				—				49				760				—				45				293				—				17
Real estate—home equity secured for personal purpose	106				—				10				8				—				—				2				—				—
Loans to individuals	4				—				—				40				4				—				47				5				—
Total	$	55,761			$	1,863			$	1,164			$	48,241			$	1,156			$	1,652			$	43,242			$	552			$	2,161
*	Includes interest income recognized on a cash basis for nonaccrual loans of $23 thousand, $6 thousand and $67 thousand for the years ended December 31, 2014, 2013 and 2012, respectively and interest income recognized on the accrual method for accruing impaired loans of $1.8 million, $1.2 million and $485 thousand for the years ended December 31, 2014, 2013 and 2012, respectively.
Any income accrued on one-to-four family residential properties after the loan becomes 90 days past due, which is not placed on non-accrual, is held in a reserve for uncollected interest. The reserve for uncollected interest was $1 thousand and $21 thousand at December 31, 2014 and 2013, respectively.
The Bank maintains a reserve in other liabilities for off-balance sheet credit exposures that currently are unfunded. The reserve for these off-balance sheet credits was $338 thousand and $319 thousand at December 31, 2014 and 2013, respectively.
Troubled Debt Restructured Loans
The following presents, by class of loans, information regarding accruing and nonaccrual loans that were restructured during the years ended December 31, 2014 and 2013:
	For the Years Ended December 31,
	2014															2013
(Dollars in thousands)	Number			Pre-				Post-				Related				Number			Pre-				Post-				Related
	of			Restructuring				Restructuring				Allowance				of			Restructuring				Restructuring				Allowance
	Loans			Outstanding				Outstanding								Loans			Outstanding				Outstanding
				Recorded				Recorded											Recorded				Recorded
				Investment				Investment											Investment				Investment
Accruing Troubled Debt Restructured Loans:
Commercial, financial and agricultural	6			$	1,824			$	1,824			$	507			2			$	1,025			$	1,025			$	—
Real estate—commercial real estate	1			1,000				1,000				—				3			1,569				1,569				—
Real estate—construction	—			—				—				—				1			459				459				—
Total	7			$	2,824			$	2,824			$	507			6			$	3,053			$	3,053			$	—
Nonaccrual Troubled Debt Restructured Loans:
Real estate—commercial real estate	1			$	50			$	50			$	—			—			$	—			$	—			$	—
Real estate—residential secured for business purpose	2			688				688				—				—			—				—				—
Total	3			$	738			$	738			$	—			—			$	—			$	—			$	—
The Corporation grants concessions primarily related to extensions of interest-only payment periods and an occasional payment modification. These modifications typically are for a short-term basis up to one year. Our goal when restructuring a credit is to establish a reasonable period of time to provide cash flow relief to customers experiencing cash flow difficulties. Accruing troubled debt restructured loans are primarily comprised of loans on which interest is being accrued under the restructured terms, and the loans are current or less than ninety days past due.
The following presents, by class of loans, information regarding the types of concessions granted on accruing and nonaccrual loans that were restructured during the years ended December 31, 2014 and 2013:
	Interest Only Term							Temporary Payment							Interest Rate							Maturity Date							Payments Suspended						Total Concessions
	Extension							Reduction							Reduction							Extension													Granted
(Dollars in thousands)	No. of			Amount				No. of			Amount				No. of			Amount				No. of			Amount				No. of			Amount			No. of	Amount
	Loans							Loans							Loans							Loans							Loans						Loans
For the Year Ended December 31, 2014
Accruing Troubled Debt Restructured Loans:
Commercial, financial and agricultural	—			$	—			—			$	—			—			$	—			5			$	1,699			1			$	125		6	$	1,824
Real estate—commercial real estate	—			—				—			—				—			—				1			1,000				—			—			1	1,000
Total	—			$	—			—			$	—			—			$	—			6			$	2,699			1			$	125		7	$	2,824
Nonaccrual Troubled Debt Restructured Loans:
Real estate—commercial real estate	—			$	—			—			$	—			1			$	50			—			$	—			—			$	—		1	$	50
Real estate—residential secured for business purpose	—			—				—			—				1			55				1			633				—			—			2	688
Total	—			$	—			—			$	—			2			$	105			1			$	633			—			$	—		3	$	738
For the Year Ended December 31, 2013
Accruing Troubled Debt Restructured Loans:
Commercial, financial and agricultural	1			$	1,000			—			$	—			—			$	—			1			$	25			—			$	—		2	$	1,025
Real estate—commercial real estate	—			—				1			756				—			—				2			813				—			—			3	1,569
Real estate—construction	—			—				—			—				—			—				1			459				—			—			1	459
Total	1			$	1,000			1			$	756			—			$	—			4			$	1,297			—			$	—		6	$	3,053
Nonaccrual Troubled Debt Restructured Loans:
Total	—			$	—			—			$	—			—			$	—			—			$	—			—			$	—		—	$	—
The following presents, by class of loans, information regarding accruing and nonaccrual troubled debt restructured loans, for which there were payment defaults within twelve months of the restructuring date:
	For the Years Ended December 31,
	2014							2013
(Dollars in thousands)	Number			Recorded				Number			Recorded
	of Loans			Investment				of Loans			Investment
Accruing Troubled Debt Restructured Loans:
Commercial, financial and agricultural	—			$	—			1			$	1,000
Total	—			$	—			1			$	1,000
Nonaccrual Troubled Debt Restructured Loans:
Total	—			$	—			—			$	—

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment
	The following table reflects the components of premises and equipment:
		At December 31,
	(Dollars in thousands)	2014			2013
	Land and land improvements	$	10,576		$	9,987
	Premises and improvements	37,348			35,225
	Furniture and equipment	24,303			22,295
	Total cost	72,227			67,507
	Less: accumulated depreciation	(35,218		)	(33,378		)
	Net book value	$	37,009		$	34,129

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	The Corporation has customer-related intangibles and mortgage servicing rights, which are not deemed to have an indefinite life and therefore will continue to be amortized over their useful life using the present value of projected cash flows. The amortization of intangible assets for the years ended December 31, 2014, 2013 and 2012 was $3.3 million, $2.3 million and $2.4 million, respectively. In 2014, 2013 and 2012, impairment on customer-related intangibles was recognized in other noninterest expense in the amount of $31 thousand, $83 thousand and $31 thousand, respectively. The Corporation also has goodwill with a net carrying amount of $67.7 million at December 31, 2014, which is deemed to be an indefinite intangible asset and is not amortized. The Corporation recorded goodwill of $6.8 million and customer related intangibles of $4.3 million related to the Girard Partners acquisition on January 27, 2014. The Corporation recorded goodwill of $3.4 million and customer related intangibles of $1.6 million related to the Sterner Insurance Associates acquisition on July 1, 2014.
	The Corporation completed an annual impairment test for goodwill and other intangibles during the fourth quarter of 2014. There was no goodwill impairment or material impairment of identifiable intangibles recorded during the period 2012 through 2014. There can be no assurance that future impairment assessments or tests will not result in a charge to earnings.
	Changes in the carrying amount of the Corporation's goodwill by business segment for the years ended December 31, 2014 and 2013 were as follows:
	(Dollars in thousands)	Banking			Wealth Management			Insurance			Consolidated
	Balance at December 31, 2012	$	35,058		$	8,625		$	12,555		$	56,238
	Addition to goodwill from acquisitions	—			—			1,279			1,279
	Balance at December 31, 2013	35,058			8,625			13,834			57,517
	Addition to goodwill from acquisitions	—			6,809			3,391			10,200
	Balance at December 31, 2014	$	35,058		$	15,434		$	17,225		$	67,717
	The following table reflects the components of intangible assets at the dates indicated:
		At December 31, 2014									At December 31, 2013
	(Dollars in thousands)	Gross Carrying Amount			Accumulated Amortization and Fair Value Adjustments			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization and Fair Value Adjustments		Net Carrying Amount
	Amortized intangible assets:
	Customer related intangibles	$	13,397		$	6,726		$	6,671		$	7,513	$	4,854	$	2,659
	Mortgage servicing rights	10,559			5,050			5,509			10,965		5,446		5,519
	Total amortized intangible assets	$	23,956		$	11,776		$	12,180		$	18,478	$	10,300	$	8,178
	The estimated aggregate amortization expense for customer related intangibles for each of the five succeeding fiscal years follows:
	Year	(Dollars in thousands)	Amount
	2015		$	1,730
	2016		1,411
	2017		1,162
	2018		868
	2019		622
	Thereafter		878
	The Corporation has originated mortgage servicing rights which are included in other intangible assets on the consolidated balance sheet. Mortgage servicing rights are amortized in proportion to, and over the period of, estimated net servicing income on a basis similar to the interest method and an accelerated amortization method for loan payoffs. Mortgage servicing rights are subject to impairment testing on a quarterly basis. The aggregate fair value of these rights was $6.9 million and $7.2 million at December 31, 2014 and 2013, respectively. The fair value of mortgage servicing rights was determined using a discount rate of 10.0% at December 31, 2014, and discount rates ranging from 5.0% to 10.0% at December 31, 2013.
	Changes in the mortgage servicing rights balance are summarized as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Beginning of period	$	5,519		$	4,152		$	2,739
	Servicing rights capitalized	1,118			2,485			2,727
	Amortization of servicing rights	(1,378		)	(1,365		)	(1,610		)
	Changes in valuation allowance	250			247			296
	End of period	$	5,509		$	5,519		$	4,152
	Mortgage loans serviced for others	$	796,835		$	751,891		$	604,801
	Activity in the valuation allowance for mortgage servicing rights was as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Valuation allowance, beginning of period	$	(250	)	$	(497	)	$	(793	)
	Additions	—			—			—
	Reductions	250			247			296
	Direct write-downs	—			—			—
	Valuation allowance, end of period	$	—		$	(250	)	$	(497	)
	The estimated amortization expense of mortgage servicing rights for each of the five succeeding fiscal years is as follows:
	Year	(Dollars in thousands)	Amount
	2015		$	923
	2016		787
	2017		662
	2018		556
	2019		466
	Thereafter		2,115

Accrued_Interest_Receivable_an

Accrued Interest Receivable and Other Assets	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Accrued Interest Receivable and Other Assets	Accrued Interest Receivable and Other Assets
	The following table provides the details of accrued interest receivable and other assets:
		At December 31,
	(Dollars in thousands)	2014		2013
	Other real estate owned	$	955	$	1,650
	Accrued interest receivable	6,086		6,262
	Accrued income and other receivables	2,655		3,539
	Fair market value of derivative financial instruments	788		346
	Other prepaid expenses	13,963		9,624
	Federal Reserve Bank stock, Federal Home Loan Bank stock and other not readily marketable equity securities	4,487		6,632
	Net federal deferred tax assets	10,756		12,335
	Total accrued interest and other assets	$	39,690	$	40,388
	At December 31, 2014 and 2013, the Bank held $3.3 million in Federal Reserve Bank stock as required by the Federal Reserve Bank. The Bank is a member of the FHLB, and as such, is required to hold FHLB stock as a condition of membership as determined by the FHLB. The Bank is required to hold additional stock in the FHLB in relation to the level of outstanding borrowings. The Bank held FHLB stock of $1.1 million and $3.3 million at December 31, 2014 and 2013, respectively. Additionally, the FHLB might require its members to increase its capital stock requirement. Changes in the credit ratings of the U.S. government and federal agencies, including the FHLB, could increase the borrowing costs of the FHLB and possibly have a negative impact on its operations and long-term performance. It is possible this could have an adverse effect on the value of the Corporation’s investment in the FHLB stock. The Corporation determined there was no other-than-temporary impairment of its investment in FHLB stock at December 31, 2014. Therefore, at December 31, 2014, the FHLB stock is recorded at cost.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The provision for federal and state income taxes included in the accompanying consolidated statements of income consists of the following:
		For the Years Ended December 31,
	(Dollars in thousands)	2014				2013				2012
	Current:
	Federal	$	2,509			$	4,172			$	2,753
	State	777				591				258
	Deferred:
	Federal	4,027				922				2,397
	State	135				11				143
		$	7,448			$	5,696			$	5,551
	The provision for income taxes differs from the expected statutory provision as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Expected provision at statutory rate	35	%		35	%		35	%
	Difference resulting from:
	Tax exempt interest income	(11.2	)		(11.7	)		(12.1	)
	Increase in value of bank owned life insurance assets	(1.9	)		(3.9	)		(3.5	)
	Other, including state income taxes, valuation allowances and rate differentials	3.2			1.8			1.6
		25.1	%		21.2	%		21	%
	During the years ended December 31, 2014 and 2013, the Corporation recorded excess tax benefits resulting from the exercise of employee stock options and restricted stock of $0 thousand and $1 thousand respectively, to additional paid-in capital.
	At December 31, 2014, the Corporation had no material unrecognized tax benefits, accrued interest or penalties. Penalties are recorded in noninterest expense in the year they are assessed and are treated as a non-deductible expense for tax purposes. Interest is recorded in noninterest expense in the year it is assessed and is treated as a deductible expense for tax purposes. At December 31, 2014, the Corporation’s tax years 2011 through 2013 remain subject to federal examination as well as examination by state taxing jurisdictions.
	Deferred income taxes reflect the the tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Deferred state taxes are combined with federal deferred taxes (net of the impact of deferred state tax on the deferred federal tax) and are shown in the table below by major category of deferred income or expense. The Corporation has a state net operating loss carry-forward of $25.0 million which will begin to expire after December 31, 2018 if not utilized. A valuation allowance at December 31, 2014 and 2013 was attributable to deferred tax assets generated in certain state jurisdictions for which management believes it is more likely than not that such deferred tax assets will not be realized. Additionally, deferred tax assets of $2 thousand and $28 thousand were reversed and recorded to additional paid-in capital during the years ended December 31, 2014 and 2013, respectively, as a result of unrecognized restricted stock and non-qualified stock option expense.
	The assets and liabilities giving rise to the Corporation’s deferred tax assets and liabilities are as follows:
		At December 31,
	(Dollars in thousands)	2014				2013
	Deferred tax assets:
	Loan and lease loss	$	7,358			$	8,785
	Deferred compensation	2,492				2,675
	Actuarial adjustments on retirement benefits*	8,625				4,568
	Interest on nonaccrual loans	—				2,268
	State net operating losses	1,621				1,743
	Other-than-temporary impairments on equity securities	577				759
	Alternative minimum tax credits**	1,067				1,367
	Net unrealized holding losses on securities available-for-sale*	—				792
	Other	1,125				280
	Gross deferred tax assets	22,865				23,237
	Valuation allowance	(1,461		)		(1,630		)
	Total deferred tax assets, net of valuation allowance	21,404				21,607
	Deferred tax liabilities:
	Market discount	2,224				1,722
	Retirement plans	5,700				5,602
	Intangible assets	2,308				2,212
	Net unrealized holding gains on securities available-for-sale and swaps*	837				—
	Total deferred tax liabilities	11,069				9,536
	Net deferred tax assets	$	10,335			$	12,071
	*Represents the amount of deferred taxes recorded in accumulated other comprehensive loss.
	** The alternative minimum tax credits have an indefinite life.

Retirement_Plans_and_Other_Pos

Retirement Plans and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Retirement Plans and Other Postretirement Benefits	Retirement Plans and Other Postretirement Benefits
	Substantially all employees who were hired before December 8, 2009 are covered by a noncontributory retirement plan. Employees hired on or after December 8, 2009 are not eligible to participate in the noncontributory retirement plan. The Corporation also provides supplemental retirement benefits to certain former executives, a portion of which is in excess of limits imposed on qualified plans by federal tax law. These plans are non-qualified benefit plans. Information on these plans are aggregated and reported under “Retirement Plans” within this footnote.
	The Corporation also provides certain postretirement healthcare and life insurance benefits for retired employees. Information on these benefits is reported under “Other Postretirement Benefits” within this footnote.
	The Corporation sponsors a 401(k) deferred salary savings plan, which is a qualified defined contribution plan, and which covers all employees of the Corporation and its subsidiaries, and provides that the Corporation makes matching contributions as defined by the plan. Expense recorded by the Corporation for the 401(k) deferred salary savings plan for the years ended December 31, 2014, 2013 and 2012 was $836 thousand, $765 thousand, and $667 thousand, respectively.
	The Corporation sponsors a Supplemental Non-Qualified Pension Plan (SNQPP) which was established in 1981 prior to the existence of a 401(k) deferred salary savings plan, employee stock purchase plan and long-term incentive plans and therefore is not offered to new participants. Expense recorded by the Corporation for the SNQPP for the years ended December 31, 2013 and 2012 was $661 thousand and $531 thousand, respectively. The Corporation recognized income in 2014 of $44 thousand primarily due to an increase in the weighted average discount rate from 4.0% for 2013 to 4.9% for 2014.
	Information with respect to the Retirement Plans and Other Postretirement Benefits follows:
		Retirement Plans								Other Postretirement Benefits
	(Dollars in thousands)	2014				2013				2014			2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	39,593			$	42,879			$	2,330		$	2,518
	Service cost	528				621				75			86
	Interest cost	1,900				1,712				128			118
	Actuarial loss (gain)	11,462				(3,818		)		455			(313		)
	Benefits paid	(2,093		)		(1,801		)		(92		)	(79		)
	Benefit obligation at end of year	$	51,390			$	39,593			$	2,896		$	2,330
	Change in plan assets:
	Fair value of plan assets at beginning of year	$	40,547			$	34,420			$	—		$	—
	Actual return on plan assets	2,821				5,764				—			—
	Benefits paid	(2,093		)		(1,801		)		(92		)	(79		)
	Employer contribution and non-qualified benefit payments	162				2,164				92			79
	Fair value of plan assets at end of year	$	41,437			$	40,547			$	—		$	—
	Funded status	(9,953		)		954				(2,896		)	(2,330		)
	Unrecognized net actuarial loss	25,010				14,138				950			510
	Unrecognized prior service costs	(1,309		)		(1,590		)		—			(7		)
	Net amount recognized	$	13,748			$	13,502			$	(1,946	)	$	(1,827	)
	Information for the pension plans with an accumulated benefit obligation in excess of the fair value of plan assets is shown below. The accumulated benefit obligation did not exceed the fair value of plan assets at December 31, 2013 but is shown for comparative purposes.
		At December 31,
	(Dollars in thousands)	2014				2013
	Projected benefit obligation	$	48,928			$	37,912
	Accumulated benefit obligation	45,003				36,683
	Fair value of plan assets	41,437				40,547
	Components of net periodic benefit cost (income) were as follows:
		Retirement Plans											Other Post Retirement
													Benefits
	(Dollars in thousands)	2014				2013				2012			2014			2013			2012
	Service cost	$	528			$	621			$	622		$	75		$	86		$	82
	Interest cost	1,900				1,712				1,726			128			118			116
	Expected return on plan assets	(2,929		)		(2,527		)		(2,254		)	—			—			—
	Amortization of net actuarial loss	649				1,259				1,147			17			23			23
	Accretion of prior service cost	(281		)		(235		)		(235		)	(7		)	(20		)	(20		)
	Net periodic benefit (income) cost	$	(133	)		$	830			$	1,006		$	213		$	207		$	201
	(Dollars in thousands)	Retirement Plans				Other Postretirement Benefits
	Expected amortization expense for 2015:
	Amortization of net actuarial loss	$	1,308			$	54
	Accretion of prior service cost	(280		)		—
	During 2015, the Corporation expects to contribute approximately $166 thousand to the Retirement Plans and approximately $113 thousand to Other Postretirement Benefits.
	The following benefits payments, which reflect expected future service, as appropriate, are expected to be paid:
	(Dollars in thousands)		Retirement Plans				Other Postretirement Benefits
	For the fiscal year ending:
	2015		$	2,390			$	113
	2016		2,429				116
	2017		2,463				121
	2018		2,514				126
	2019		2,572				130
	Years 2020-2024		13,533				700
	Weighted-average assumptions used to determine benefit obligations at December 31, 2014 and 2013 were as follows:
		Retirement Plans						Other Postretirement Benefits
		2014			2013			2014			2013
	Assumed discount rate	3.9	%		4.9	%		3.9	%		4.9	%
	Assumed salary increase rate	3			3			—			—
	The benefit obligation for all plans at December 31, 2014 included the application of a new mortality assumption based on the most recent study by the Society of Actuaries. The adoption of the new RP-2014 mortality table increased the average life expectancy of plan participants by 2 years. The decrease in the discount rate and the adoption of the new mortality assumption increased the benefit obligation for all plans at December 31, 2014.
	Weighted-average assumptions used to determine net periodic costs for the years ended December 31, 2014 and 2013 were as follows:
		Retirement Plans						Other Postretirement Benefits
		2014			2013			2014			2013
Assumed discount rate	4.9	%		4	%		4.9	%		4	%
Assumed long-term rate of investment return	7.5			7.5			—			—
Assumed salary increase rate	3			3			—			—
The discount rate was determined utilizing the Citigroup Pension Discount Curve. Historical investment returns is the basis used to determine the overall expected long-term rate of return on assets.
Assumed Health Care Cost Trend Rates		2014			2013			2012
Health care cost trend rate assumed for next year		6	%		6.5	%		6.5	%
Rate to which the cost trend rate is assumed to decline		5			5			5
Year that the rate reaches the ultimate rate		2016			2015			2014
Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A one-percentage-point change in the assumed health care cost trend rates would have the following effects:
	One Percentage Point
(Dollars in thousands)	Increase				Decrease
Effect on total of service and interest cost components	$	10			$	(10	)
Effect on postretirement benefit obligation	114				(101		)
The Corporation's pension plan asset allocation at December 31, 2014 and 2013, by asset category was as follows:
	Percentage of Plan Assets at December 31,
	2014			2013
Asset Category:
Equity securities	65	%		64	%
Debt securities	34			35
Other	1			1
Total	100	%		100	%
Plan assets include marketable equity securities, corporate and government debt securities, and certificates of deposit. The investment strategy is to keep a 60%-equity-to-40%-fixed-income mix to achieve the overall expected long-term rate of return of 7.5%. Equity securities do not include any common stock of the Corporation.
The major categories of assets in the Corporation’s pension plan at year-end are presented in the following table. Assets are segregated by the level of the valuation inputs within the fair value hierarchy described in Note 18, “Fair Value Disclosures.”
	Fair Value Measurements at December 31,
(Dollars in thousands)	2014				2013
Level 1:
Mutual funds:
U.S. Large Cap	17,482				16,710
U.S. Mid Cap	2,218				2,169
U.S. Small Cap	2,290				2,341
International	4,961				4,634
Income	972				686
Short-term investments	585				650
Level 2:
U.S. governement obligations	3,273				3,790
Corporate bonds	5,621				5,228
Level 3:
Certificates of deposit	4,035				4,339
Total fair value of plan assets	$	41,437			$	40,547
Mutual fund investments in U.S. large cap funds are comprised primarily of common stock funds which are diversified amongst various industries including basic materials (oil, gas, and other), financial services, healthcare, technology and other industries with some foreign exposure in the companies’ markets. The primary objective is long-term capital appreciation with a secondary objective of current income. Mutual fund investments in U.S. mid cap and small cap funds are comprised mainly of growth and value equity funds with some foreign exposure in the companies’ markets. Mutual fund investments in international funds consist mainly of equity funds that invest in diverse companies mostly based in Europe and the Pacific Basin with the primary objective to provide long-term growth of capital with a secondary objective of current income. Mutual fund investments in income funds are comprised of short-term and intermediate-term bond funds. Corporate bonds are fixed income investment grade bonds of primarily U.S. issuers from diverse industries. Other fixed-income investments include U.S. government agency securities and bank certificates of deposits. The fixed income investments have varying maturities ranging from one to ten years with the objective to maximize investment return while preserving investment principal. Short-term investments are comprised of an interest-bearing money market deposit account with the Bank.
The following table provides a reconciliation of the beginning and ending balances for measurements in hierarchy Level 3 at December 31, 2014 and 2013:
(Dollars in thousands)	Balance at December 31, 2013				Total Unrealized (Losses) or Gains				Total Realized Gains or (Losses)			Purchases			Maturities/ Redemptions			Balance at December 31, 2014
Certificates of deposit	$	4,339			$	—			$	—		$	595		$	(899	)	$	4,035
Total Level 3 assets	$	4,339			$	—			$	—		$	595		$	(899	)	$	4,035
(Dollars in thousands)	Balance at December 31, 2012				Total Unrealized (Losses) or Gains				Total Realized Gains or (Losses)			Purchases			Maturities/ Redemptions			Balance at December 31, 2013
Certificates of deposit	$	4,503			$	—			$	—		$	280		$	(444	)	$	4,339
Total Level 3 assets	$	4,503			$	—			$	—		$	280		$	(444	)	$	4,339

StockBased_Incentive_Plan

Stock-Based Incentive Plan	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Incentive Plan	Stock-Based Incentive Plan
	The Corporation adopted the shareholder approved 2013 Long-Term Incentive Plan to replace the 2003 Long-Term Incentive Plan which expired during 2013. Under the 2013 Long-Term Incentive Plan, the Corporation may grant options and share awards to employees and non-employee directors up to 2,000,000 shares of common stock. The number of shares of common stock available for issuance under the plan is subject to adjustment, as described in the plan. This includes, in the event of any merger, reorganization, consolidation, recapitalization, stock dividend, or other change in corporate structure affecting the stock, substitution or adjustment shall be made in the aggregate number of shares reserved for issuance under the plan, in the number and option price of shares subject to outstanding options granted under the plan and in the number and price of shares subject to other awards, as described in the plan. As a result of the completion of the acquisition of Valley Green Bank on January 1, 2015, 473,483 additional shares are available for distribution under the 2013 Long-Term Incentive Plan. The plan provides for the issuance of options to purchase common shares at prices not less than 100 percent of the fair market value on the date of option grant and have a contractual term of ten years; and for restricted stock awards valued at not less than 100 percent of the fair market value at the date of award grant. For the majority of options issued, after two years, 33.3 percent of the optioned shares become exercisable in each of the following three years and remain exercisable for a period not exceeding ten years from the date of grant. For the majority of the restricted stock awards, the shares vest based upon the Corporation’s performance against selected peers with respect to certain financial measures over a three-year period. There were 1,831,545 share awards available for future grants at December 31, 2014 under the plan. At December 31, 2014, there were 673,216 options to purchase common stock and 176,978 unvested restricted stock awards outstanding under the plan.
	The following table is a summary of the status of options under the Corporation’s long-term incentive plans:
	(Dollars in thousands, except per share data)	Shares Under Option			Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value at December 31, 2014
	Outstanding at December 31, 2013	612,050			$	19.41
	Granted	114,000			18.78
	Expired	—			—
	Forfeited	(35,500	)		17.06
	Exercised	(17,334	)		17.92
	Outstanding at December 31, 2014	673,216			19.46				5.2		$	1,201
	Exercisable at December 31, 2014	393,662			21.07				3.1		351
	The total intrinsic value of options exercised during 2014 was $47 thousand. There were no stock options exercised during 2013 and 2012. The Corporation has a stock-for-stock-option exchange (or cashless exercise) program in place, whereby optionees can exchange the value of the spread of in-the-money vested options for Corporation stock having an equivalent value. This broker-assisted exchange allows the optionees to exercise their vested options on a net basis without having to pay the exercise price or related expenses in cash. However, it will result in the optionees acquiring fewer shares than the number of options exercised.
	The Corporation's estimate of the fair value of a stock option is based on expectations derived from historical experience and may not necessarily equate to its market value when fully vested. The life of the option is based on historical factors which include the contractual term, vesting period, exercise behavior and employee turnover. The risk-free rate for periods within the expected term of the option is based on the U.S. Treasury strip rate in effect at the time of grant. Expected volatility is based on the historical volatility of the Corporation’s stock over the expected life of the grant. The Corporation uses a straight-line accrual method to recognize stock-based compensation expense over the time-period it expects the options to vest.
	The Corporation recognizes compensation expense for stock options over the requisite service period based on the grant-date fair value of those awards expected to ultimately vest. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs materially from original estimates. The following aggregated assumptions were used to estimate the fair value of options granted for the periods indicated:
		For the Years Ended December 31,
		2014				2013				2012
	Expected option life in years	8.2				8.9				8.2
	Risk free interest rate	2.51		%		1.99		%		1.63		%
	Expected dividend yield	4.26		%		4.74		%		5.4		%
	Expected volatility	50.16		%		49.3		%		50.74		%
	Fair value of options	$	6.53			$	5.32			$	4.37
	Following is a summary of nonvested restricted stock awards at December 31, 2014 including changes during the year:
	(Dollars in thousands, except per share data)	Nonvested Share Awards			Weighted Average Grant Date Fair Value
	Nonvested share awards at December 31, 2013	185,423			$	16.4
	Granted	74,304			18.63
	Vested	(39,297	)		17.24
	Forfeited	(43,452	)		16.91
	Nonvested share awards at December 31, 2014	176,978			17.02
	The fair value of restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period. Certain information regarding restricted stock is summarized below for the periods indicated:
	(Dollars in thousands, except per share data)	For the Years Ended December 31,
		2014				2013				2012
	Shares granted	74,304				70,041				71,157
	Weighted average grant date fair value	$	18.63			$	16.76			$	15.29
	Intrinsic value of awards vested	$	735			$	505			$	625
	At December 31, 2014, there was $1.5 million in total unrecognized compensation expense related to nonvested share-based compensation arrangements, which is expected to be recognized over a weighted average period of 2.2 years.
	The following table presents information related to the Corporation’s compensation expense related to stock incentive plans recognized for the periods indicated:
		For the Years Ended December 31,
	(Dollars in thousands)	2014				2013				2012
	Stock-based compensation expense:
	Stock options	$	463			$	517			$	408
	Restricted stock awards	679				461				859
	Employee stock purchase plan	46				38				36
	Total	$	1,188			$	1,016			$	1,303
	Tax benefit on nonqualified stock option expense, restricted stock awards and disqualifying dispositions of incentive stock options	$	244			$	162			$	296
	There were no modifications or accelerations to options or restricted stock awards during the period 2012 through 2014.
	The Corporation typically issues shares for stock option exercises and grants of restricted stock awards from its treasury stock.

Time_Deposits

Time Deposits	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Time Deposits	Time Deposits
	The aggregate amount of time deposits in denominations of $100 thousand or more was $76.8 million at December 31, 2014 and $75.9 million at December 31, 2013, with interest expense of $891 thousand for 2014 and $1.0 million for 2013.
	At December 31, 2014, the scheduled maturities of time deposits in denominations of $100 thousand or more are as follows:
	(Dollars in thousands)
	Due in 2015	$	41,844
	Due in 2016	20,140
	Due in 2017	9,232
	Due in 2018	2,251
	Due in 2019	1,967
	Thereafter	1,392
	Total	$	76,826

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Borrowings	Borrowings
	The Corporation, through the Bank, has short-term and long-term credit facilities with the FHLB with a maximum borrowing capacity of approximately $518.7 million. Advances from the FHLB are collateralized by a blanket floating lien on all first mortgage loans of the Bank, FHLB capital stock owned by the Bank and any funds on deposit with the FHLB. At December 31, 2014 and 2013, there were no outstanding borrowings with the FHLB. At December 31, 2014 and 2013, the Bank had outstanding short-term letters of credit with the FHLB totaling $55.0 million and $35.0 million, respectively, which were utilized to collateralize public funds deposits. The maximum borrowing capacity changes as a function of the Bank’s qualifying collateral assets as well as the FHLB’s internal credit rating of the Bank and the amount of funds received may be reduced by additional required purchases of FHLB stock.
	On May 14, 2013, the Corporation submitted a redemption notice to the trustee to redeem all of the outstanding capital securities issued by Univest Capital Trust I (Trust Preferred Securities), pursuant to the optional redemption provisions provided in the documents governing the Trust Preferred Securities. The Trust Preferred Securities had an aggregate principal balance of $20.0 million with an interest rate of three-month U.S. London Interbank Borrowing Rate (LIBOR) plus 3.05% per annum and a maturity date of October 7, 2033. The Trust Preferred Securities had a liquidation amount of $1,000 per trust preferred security plus accrued and unpaid distributions to the redemption date of July 7, 2013 and a settlement date Monday, July 8, 2013. The redemption also included $619 thousand in common securities issued by Univest Capital Trust I and related to the Trust Preferred Securities. Following the redemption, the Corporation’s capital levels remained well in excess of the regulatory minimum for well capitalized status.
	This redemption was consistent with the capital plan the Corporation submitted to the Federal Reserve and was funded from the Corporation’s existing cash. The Trust Preferred Securities were hedged and the Corporation recognized a loss in May 2013 on the termination of the associated interest rate swap of $1.9 million. The interest rate swap had a maturity date of January 7, 2019.
	The Bank maintains federal fund credit lines with several correspondent banks totaling $82.0 million at December 31, 2014 and 2013. There was no outstanding balance at December 31, 2014 and 2013. Future availability under these lines is subject to the prerogatives of the granting banks and may be withdrawn at will.
	The Corporation, through the Bank, has an available line of credit at the Federal Reserve Bank of Philadelphia, the amount of which is dependent upon the balance of loans and securities pledged as collateral. At December 31, 2014 and 2013, the Corporation had no outstanding borrowings from this line.
	The following table details key information pertaining to customer repurchase agreements on an overnight basis for the periods indicated:
	(Dollars in thousands)	2014			2013			2012
	Balance at December 31	$	41,974		$	37,256		$	96,282
	Weighted average interest rate at year end	0.06		%	0.07		%	0.07		%
	Maximum amount outstanding at any month's end	$	43,266		$	110,228		$	117,291
	Average amount outstanding during the year	41,048			72,211			106,206
	Weighted average interest rate during the year	0.06		%	0.06		%	0.13		%

Earnings_per_Share

Earnings per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share, Basic and Diluted [Abstract]
Earnings per Share	Earnings per Share
	The following table sets forth the computation of basic and diluted earnings per share:
		For the Years Ended December 31,
	(Dollars and shares in thousands)	2014		2013		2012
	Numerator for basic and diluted earnings per share—income available to common shareholders	$	22,231	$	21,189	$	20,872
	Denominator for basic earnings per share—weighted-average shares outstanding	16,235		16,605		16,761
	Effect of dilutive securities—employee stock options and awards	90		70		55
	Denominator for diluted earnings per share—adjusted weighted-average shares outstanding	16,325		16,675		16,816
	Basic earnings per share	$	1.37	$	1.28	$	1.25
	Diluted earnings per share	$	1.36	$	1.27	$	1.24
	Average anti-dilutive options and awards excluded from computation of diluted earnings per share	499		546		581

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss
	The following table shows the components of accumulated other comprehensive loss, net of tax benefit, for the periods presented:
	(Dollars in thousands)	Net Unrealized				Net Change				Net Change				Accumulated
		Gains (Losses) on				Related to				Related to				Other
		Available-for-Sale				Derivatives Used				Defined Benefit				Comprehensive
		Investment				for Cash Flow				Pension Plans				Loss
		Securities				Hedges
	Balance, December 31, 2011	$	7,306			$	(932	)		$	(12,475	)		$	(6,101	)
	Net Change	1,038				(309		)		(1,548		)		(819		)
	Balance, December 31, 2012	8,344				(1,241		)		(14,023		)		(6,920		)
	Net Change	(9,816		)		1,241				5,540				(3,035		)
	Balance, December 31, 2013	(1,472		)		—				(8,483		)		(9,955		)
	Net Change	3,183				(157		)		(7,533		)		(4,507		)
	Balance, December 31, 2014	$	1,711			$	(157	)		$	(16,016	)		$	(14,462	)
	The following table illustrates the amounts reclassified out of each component of accumulated comprehensive loss for the periods presented:
	Details about Accumulated Other		Amount Reclassified from Accumulated												Affected Line Item in the
	Comprehensive Loss Components		Other Comprehensive Loss												Statement of Income
			For the years ended December 31,
	(Dollars in thousands)		2014				2013				2012
	Net unrealized holding gains on available-for-sale investment securities:
			$	635			$	3,389			$	305			Net gain on sales of investment securities
			—				—				(13		)		Other-than-temporary impairment on equity securities
			635				3,389				292				Total before tax
			(222		)		(1,186		)		(102		)		Tax expense
			$	413			$	2,203			$	190			Net of tax
	Cash flow hedge derivative:
			$	—			$	(1,866	)		$	—			Net loss on interest rate swap
			—				(1,866		)		—				Total before tax
			—				653				—				Tax benefit
			$	—			$	(1,213	)		$	—			Net of tax
	Defined benefit pension plans:
	Amortization of net loss included in net periodic pension costs*		$	(666	)		$	(1,282	)		$	(1,170	)
	Accretion of prior service cost included in net periodic pension costs*		288				255				255
			(378		)		(1,027		)		(915		)		Total before tax
			132				360				320				Tax benefit
			$	(246	)		$	(667	)		$	(595	)		Net of tax
	*	These accumulated other comprehensive loss components are included in the computation of net periodic pension cost. (See Note 10—Retirement Plans and Other Postretirement Benefits for additional details.)

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Loan commitments are made to accommodate the financial needs of the Bank’s customers. The Bank offers commercial, mortgage, and consumer credit products to its customers in the normal course of business, which are detailed in Note 5. These products represent a diversified credit portfolio and are generally issued to borrowers within the Bank’s locations in Southeastern Pennsylvania. The ability of the customers to repay their credit is, to some extent, dependent upon the economy in the Bank’s market areas. Collateral is obtained based on management’s credit assessment of the customer.
	Standby letters of credit commit the Bank to make payments on behalf of customers when certain specified future events occur. They are primarily issued to support commercial paper, medium and long-term notes and debentures, including industrial revenue obligations. The approximate term is usually one year but some can be up to five years. Historically, substantially all standby letters of credit expire unfunded. If funded, the majority of the letters of credit carry current market interest rates if converted to loans. Because letters of credit are generally un-assignable by either the Bank or the borrower, they only have value to the Bank and the borrower. The carrying amount is recorded as unamortized deferred fees and the exposure is considered in the reserve for credit risk. At December 31, 2014, the maximum potential amount of future payments under letters of credit is $46.9 million. The current carrying amount of the contingent obligation is $441 thousand. This arrangement has credit risk essentially the same as that involved in extending loans to customers and is subject to the Bank’s normal credit policies. Collateral is obtained based on management’s credit assessment of the customer.
	The Bank maintains a reserve in other liabilities for estimated losses associated with sold mortgages that may be repurchased. At December 31, 2014, the reserve for sold mortgages was $264 thousand.
	The Corporation entered into risk participation agreements (RPAs) as a guarantor to other financial institutions, in order to mitigate those institutions’ credit risk associated with interest rate swaps with third parties. The RPA stipulates that, in the event of default by the third party on the interest rate swap, the Corporation will reimburse a portion of the loss borne by the financial institution. The third parties usually have other borrowing relationships with the Corporation. The Corporation monitors overall borrower collateral and performance, and at the end of December 31, 2014, believes sufficient collateral is available to cover potential swap losses. The Corporation pledges cash or securities to cover a portion of the negative fair value of the RPAs, as measured by the participant financial institution. The terms of the RPAs, which correspond to the terms of the underlying swaps, range from 10 to 13 years. At December 31, 2014, the notional amount of the RPAs was $19.4 million, with a negative fair value of $1.2 million, of which $370 thousand was pledged to the participant financial institutions as collateral. The maximum potential future payment guaranteed by the Corporation cannot be readily estimated, but is dependent upon the fair value of the interest rate swaps at the time of default. If an event of default on all contracts had occurred at December 31, 2014, the Corporation would have been required to make payments of approximately $1.2 million. The RPA requires the Corporation to reimburse the institution in proportion to the pro rata share of the third party transactions, in the event the third party fails to make a payment to the institution. In exchange, the Corporation receives an agreed-upon fee from the institution for taking this risk. The fee is paid upfront to the Corporation and the Corporation recognizes the fee over the term of the loan(s). The fair value of the guarantee was $74 thousand at December 31, 2014.
	Based on consultation with the Corporation’s legal counsel, management is not aware of any litigation that would be probable of occurring or probable of having a material adverse effect on the Corporation’s consolidated balance sheet or statement of income. There are no proceedings pending other than the ordinary routine litigation incident to the business of the Corporation. In addition, there are no material proceedings pending or known to be threatened or contemplated against the Corporation or the Bank by government authorities.
	The following schedule summarizes the Corporation’s off-balance sheet financial instruments at December 31, 2014:
	(Dollars in thousands)	Contract/Notional Amount
	Financial instruments representing credit risk:
	Commitments to extend credit	$	538,488
	Performance letters of credit	19,240
	Financial standby letters of credit	27,526
	Other letters of credit	101
	At December 31, 2014, the Corporation and its subsidiaries were obligated under non-cancelable leases for various premises and equipment. Portions of certain properties are subleased. A summary of the future minimum rental commitments under non-cancelable operating leases with original or remaining terms greater than one year is as follows:
	(Dollars in thousands)
	Year	Amount
	2015	$	2,297
	2016	2,269
	2017	2,080
	2018	2,096
	2019	1,705
	Thereafter	23,092
	Total	$	33,539
	The following table summarizes rental expense charged to operations for the periods indicated:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Rental expense	$	2,732		$	2,304		$	2,250
	Sublease rental income	(238		)	(278		)	(396		)
	Net rental expense	$	2,494		$	2,026		$	1,854
	Minimum future rental income receivable under subleases from non-cancelable operating leases was $183 thousand at December 31, 2014.

Derivative_Instruments_and_Hed

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities
	The Corporation may use interest-rate swap agreements to modify interest rate characteristics from variable to fixed or fixed to variable in order to reduce the impact of interest rate changes on future net interest income. Recorded amounts related to interest-rate swaps are included in other assets or liabilities. The Corporation’s credit exposure on interest rate swaps includes fair value and any collateral that is held by a third party. Changes in the fair value of derivative instruments designated as hedges of future cash flows are recognized in accumulated other comprehensive income until the underlying forecasted transactions occur, at which time the deferred gains and losses are recognized in earnings. For a qualifying fair value hedge, the gain or loss on the hedging instrument is recognized in earnings, and the change in fair value of the hedge item, to the extent attributable to the hedged risk, adjusts the carrying amount of the hedge item and is recognized in earnings.
	Derivative loan commitments represent agreements for delayed delivery of financial instruments in which the buyer agrees to purchase and the seller agrees to deliver, at a specified future date, a specified instrument at a specified price or yield. The Corporation’s derivative loan commitments are commitments to sell loans secured by 1-to-4 family residential properties whose predominant risk characteristic is interest rate risk. The fair values of these derivative loan commitments are based upon the estimated amount the Corporation would receive or pay to terminate the contracts or agreements, taking into account current interest rates and, when appropriate, the current creditworthiness of the counterparties.
	On October 24, 2014, the Corporation entered into an amortizing cash flow hedge with a notional amount of $20.0 million to hedge a portion of the debt financing of a pool of 10-year maturity fixed rate loans with balances totaling $29.1 million, at time of the hedge, that were originated in 2013. A brokered money market demand account totaling $25.0 million is being used for the cash flow hedge. Under the terms of the swap agreement, the Corporation pays a fixed rate of 2.10% and receives a floating rate based on the one-month LIBOR with a maturity date of November 1, 2022. The Corporation performed an assessment of the hedge for effectiveness at the inception of the hedge and on a recurring basis to determine that the derivative has been and is expected to continue to be highly effective in offsetting changes in cash flows of the hedged item. The Corporation expects that there will be no ineffectiveness in 2015, and therefore anticipates no portion of the net loss in accumulated other comprehensive loss will be reclassified to interest expense within the next twelve months.
	The Corporation pledges cash or securities to cover a portion of the negative fair value of the interest rate swap, as measured by the counterparty. At December 31. 2014, the notional amount of the cash flow hedge was $19.9 million, with a negative fair value of $241 thousand. The Corporation has pledged $300 thousand to the counteryparty as collateral for the negative fair value.
	On December 23, 2008, the Corporation entered into a cash flow hedge with a notional amount of $20.0 million that had the effect of converting the variable rates on Trust Preferred Securities to a fixed rate. Under the terms of the swap agreement, the Corporation paid a fixed rate of 2.65% and received a floating rate based on the three-month LIBOR with a maturity date of January 7, 2019. During May 2013, the Corporation terminated the swap in conjunction with the submission of a redemption notice to the trustee to redeem the Trust Preferred Securities on July 7, 2013, pursuant to the optional redemption provisions provided in the documents governing the Trust Preferred Securities. See Note 13, “Borrowings” for additional information.
	The following table presents the notional amounts and fair values of derivatives not designated as hedging instruments recorded on the consolidated balance sheets at December 31, 2014 and 2013:
						Derivative Assets				Derivative Liabilities
	(Dollars in thousands)	Notional				Balance Sheet	Fair			Balance Sheet		Fair
		Amount				Classification	Value			Classification		Value
	At December 31, 2014
	Interest rate locks with customers	$	27,007			Other assets	$	788				$	—
	Forward loan sale commitments	30,537					—			Other liabilities		112
	Total	$	57,544				$	788				$	112
	At December 31, 2013
	Interest rate locks with customers	$	15,176			Other assets	$	321				$	—
	Forward loan sale commitments	17,425				Other assets	25					—
	Total	$	32,601				$	346				$	—
	The following table presents the notional amounts and fair values of derivatives designated as hedging instruments recorded on the consolidated balance sheets at December 31, 2014 and 2013:
						Derivative Assets				Derivative Liabilities
	(Dollars in thousands)	Notional				Balance Sheet	Fair			Balance Sheet		Fair
		Amount				Classification	Value			Classification		Value
	At December 31, 2014
	Interest rate swap - cash flow hedge	$	19,945				$	—		Other liabilities		$	241
	Total	$	19,945				$	—				$	241
	At December 31, 2013
	Interest rate swap - cash flow hedge	$	—				$	—				$	—
	Total	$	—				$	—				$	—
	The following table presents amounts included in the consolidated statements of income for derivatives not designated as hedging instruments for the periods indicated:
		Statement of Income Classification		For the Years Ended December 31,
	(Dollars in thousands)			2014			2013			2012
	Interest rate locks with customers	Net gain (loss) on mortgage banking activities		$	467		$	(1,226	)	$	467
	Forward loan sale commitments	Net (loss) gain on mortgage banking activities		(137		)	79			248
	Total			$	330		$	(1,147	)	$	715
	The following table presents amounts included in the consolidated statements of income for derivatives designated as hedging instruments for the periods indicated:
		Statement of Income Classification		For the Years Ended December 31,
	(Dollars in thousands)			2014			2013			2012
	Interest rate swap—cash flow hedge—loss on termination	Net loss on termination of interest rate swap		$	—		$	(1,866	)	$	—
	Interest rate swap—cash flow hedge—interest payments	Interest expense		66			124			448
	Interest rate swap—cash flow hedge—ineffectiveness	Interest expense		—			—			—
	Net loss			$	(66	)	$	(1,990	)	$	(448	)
	The following table presents amounts included in accumulated other comprehensive (loss) income for derivatives designated as hedging instruments for the periods indicated:
		Accumulated Other		For the Years Ended December 31,
	(Dollars in thousands)	Comprehensive (Loss) Income		2014			2013			2012
	Interest rate swap—cash flow hedge	Fair value, net of taxes		$	(157	)	$	—		$	(1,241	)
	Total			$	(157	)	$	—		$	(1,241	)

Fair_Value_Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures
	Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The Corporation determines the fair value of its financial instruments based on the fair value hierarchy. The Corporation maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Corporation. Unobservable inputs are inputs that reflect the Corporation’s assumptions that the market participants would use in pricing the asset or liability based on the best information available in the circumstances, including assumptions about risk. Three levels of inputs are used to measure fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input significant to the fair value measurement. Transfers between levels are recognized at the end of the reporting period.
	•	Level 1: Valuations are based on quoted prices in active markets for identical assets or liabilities that the Corporation can access at the measurement date. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these products does not entail a significant degree of judgment.
	•	Level 2: Valuations are based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.
	•	Level 3: Valuations are based on inputs that are unobservable and significant to the overall fair value measurement. Assets and liabilities utilizing Level 3 inputs include: financial instruments whose value is determined using pricing models, discounted cash-flow methodologies, or similar techniques, as well as instruments for which the fair value calculation requires significant management judgment or estimation.
	Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy.
	Investment Securities
	Where quoted prices are available in an active market for identical instruments, investment securities are classified within Level 1 of the valuation hierarchy. Level 1 investment securities include U.S. Treasury securities, most equity securities and money market mutual funds. Mutual funds are registered investment companies which are valued at net asset value of shares on a market exchange at the end of each trading day. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics or discounted cash flows. Examples of instruments, which would generally be classified within Level 2 of the valuation hierarchy, include securities issued by U.S. government sponsored enterprises, mortgage-backed securities, collateralized mortgage obligations, corporate and municipal bonds and certain equity securities. In cases where there is limited activity or less transparency around inputs to the valuation, investment securities are classified within Level 3 of the valuation hierarchy.
	Fair values for securities are determined using independent pricing services and market-participating brokers. The Corporation’s independent pricing service utilizes evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information for structured securities, cash flow and, when available, loan performance data. Because many fixed income securities do not trade on a daily basis, the pricing service’s evaluated pricing applications apply information as applicable through processes, such as benchmarking of like securities, sector groupings, and matrix pricing, to prepare evaluations. If at any time, the pricing service determines that it does have not sufficient verifiable information to value a particular security, the Corporation will utilize valuations from another pricing service. Management has a sufficient understanding of the third party service’s valuation models, assumptions and inputs used in determining the fair value of securities to enable management to maintain an appropriate system of internal control.
	On a quarterly basis, the Corporation reviews changes, as submitted by the pricing service, in the market value of its security portfolio. Individual changes in valuations are reviewed for consistency with general interest rate movements and any known credit concerns for specific securities. Additionally, on an annual basis, the Corporation has its security portfolio priced by a second pricing service to determine consistency with another market evaluator, except for municipal bonds which are priced by another service provider on a sample basis. If, upon the Corporation’s review or in comparing with another service, a material difference between pricing evaluations were to exist, the Corporation may submit an inquiry to its current pricing service regarding the data used to make the valuation of a particular security. If the Corporation determines it has market information that would support a different valuation than its current pricing service’s evaluation it can submit a challenge for a change to that security’s valuation. There were no material differences in valuations noted at December 31, 2014.
	Derivative Financial Instruments
	The fair values of derivative financial instruments are based upon the estimated amount the Corporation would receive or pay to terminate the contracts or agreements, taking into account current interest rates and, when appropriate, the current creditworthiness of the counterparties. Derivative financial instruments are classified within Level 2 of the valuation hierarchy.
	Contingent Consideration Liability
	The Corporation estimates the fair value of the contingent consideration liability by using a discounted cash flow model of future contingent payments based on projected revenue related to the acquired business. The estimated fair value of the contingent consideration liability is reviewed on a quarterly basis and any valuation adjustments resulting from a change in the discount rate or change of estimated future contingent payments based on projected revenue of the acquired business affecting the contingent consideration liability will be recorded through noninterest expense. Due to the significant unobservable input related to the projected revenue, the contingent consideration liability is classified within Level 3 of the valuation hierarchy. An increase in the projected revenue may result in a higher fair value of the contingent consideration liability. Alternatively, a decrease in the projected revenue may result in a lower estimated fair value of the contingent consideration liability.
	For the Sterner Insurance Associates acquisition, the potential cash payments that could result from the contingent consideration arrangement range from $0 to a maximum of $5.7 million over the three-year period ending June 30, 2017.
	For the Girard Partners acquisition, the potential cash payments that could result from the contingent consideration arrangement range from $0 to a maximum of $14.5 million cumulative over the five-year period ending December 31, 2018.
	For the John T. Fretz Insurance Agency acquisition, the remaining potential future cash payments that could result from the contingent consideration arrangement range from $0 to a maximum of $620 thousand cumulative over the two-year period ending April 30, 2016.
	For the Javers Group acquisition, the Corporation recorded a reduction to the contingent liability during 2013 which resulted in a reduction of other noninterest expense of $959 thousand. The adjustment reflected that revenue levels necessary for an earn-out payment in the first year post-acquisition were not met and that revenue growth levels necessary to qualify for subsequent years’ earn-out payments to be made are remote. Therefore, as of December 31, 2014, the fair value of this contingent consideration liability is $0. The Javers’ original contingent consideration arrangement ranged from $0 to a maximum of $1.7 million cumulative over the three-year period ending June 30, 2015.
	The following table presents the assets and liabilities measured at fair value on a recurring basis at December 31, 2014 and 2013, classified using the fair value hierarchy:
		At December 31, 2014
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/
										Liabilities at
										Fair Value
	Assets:
	Available-for-sale securities:
	U.S. treasuries	$	4,845	$	—		$	—		$	4,845
	U.S. government corporations and agencies	—		121,844			—			121,844
	State and political subdivisions	—		102,774			—			102,774
	Residential mortgage-backed securities	—		13,643			—			13,643
	Collateralized mortgage obligations	—		3,725			—			3,725
	Corporate bonds	—		54,440			—			54,440
	Money market mutual funds	11,675		—			—			11,675
	Equity securities	1,337		—			—			1,337
	Total available-for-sale securities	17,857		296,426			—			314,283
	Interest rate locks with customers	—		788			—			788
	Total assets	$	17,857	$	297,214		$	—		$	315,071
	Liabilities:
	Interest rate swap	$	—	$	241		$	—		$	241
	Forward loan sale commitments	—		112			—			112
	Contingent consideration liability	—		—			6,541			6,541
	Total liabilities	$	—	$	353		$	6,541		$	6,894
		At December 31, 2013
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/
										Liabilities at
										Fair Value
	Assets:
	Available-for-sale securities:
	U.S. treasuries	$	4,708	$	—		$	—		$	4,708
	U.S. government corporations and agencies	—		128,148			—			128,148
	State and political subdivisions	—		107,657			—			107,657
	Residential mortgage-backed securities	—		35,480			—			35,480
	Collateralized mortgage obligations	—		7,201			—			7,201
	Corporate bonds	—		33,840			—			33,840
	Money market mutual funds	16,900		—			—			16,900
	Equity securities	2,347		—			—			2,347
	Total available-for-sale securities	23,955		312,326			—			336,281
	Interest rate locks with customers	—		321			—			321
	Forward loan sale commitments	—		25			—			25
	Total assets	$	23,955	$	312,672		$	—		$	336,627
	Liabilities:
	Contingent consideration liability	$	—	$	—		$	501		$	501
	Total liabilities	$	—	$	—		$	501		$	501
	At December 31, 2014 and December 31, 2013, the Corporation had no assets measured at fair value on a recurring basis utilizing Level 3 inputs.
	The following table presents the change in the balance of the contingent consideration liability related to acquisitions for which the Corporation utilized Level 3 inputs to determine fair value on a recurring basis for the years ended December 31, 2014 and 2013:
	For the Year Ended December 31, 2014
(Dollars in thousands)	Balance at		Contingent			Payment of			Adjustment			Balance at December 31, 2014
	December 31,		Consideration			Contingent			of Contingent
	2013		from New			Consideration			Consideration
			Acquisition
Sterner Insurance Associates	$	—	$	635		$	—		$	45		$	680
Girard Partners	—		5,470			—			33			5,503
John T. Fretz Insurance Agency	501		—			(310		)	167			358
Total contingent consideration liability	$	501	$	6,105		$	(310	)	$	245		$	6,541
	For the Year Ended December 31, 2013
(Dollars in thousands)	Balance at		Contingent			Payment of			Adjustment			Balance at December 31, 2013
	December 31,		Consideration			Contingent			of Contingent
	2012		from New			Consideration			Consideration
			Acquisition
John T. Fretz Insurance Agency	$	—	$	454		$	—		$	47		$	501
Javers Group	903		—			—			(903		)	—
Total contingent consideration liability	$	903	$	454		$	—		$	(856	)	$	501
The Corporation may be required to periodically measure certain assets and liabilities at fair value on a non-recurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market accounting or impairment charges of individual assets. The following table represents assets measured at fair value on a non-recurring basis at December 31, 2014 and 2013:
	At December 31, 2014
(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/Liabilities at
									Fair Value
Impaired loans held for investment	$	—	$	—		$	55,193		$	55,193
Total	$	—	$	—		$	55,193		$	55,193
	At December 31, 2013
(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/Liabilities at
									Fair Value
Impaired loans held for investment	$	—	$	—		$	55,370		$	55,370
Total	$	—	$	—		$	55,370		$	55,370
The following table presents assets and liabilities and off-balance sheet items not measured at fair value on a recurring or non-recurring basis in the Corporation’s consolidated balance sheets but for which the fair value is required to be disclosed at December 31, 2014 and 2013. The disclosed fair values are classified using the fair value hierarchy.
	At December 31, 2014
(Dollars in thousands)	Level 1		Level 2			Level 3			Fair			Carrying
									Value			Amount
Assets:
Cash and short-term interest-earning assets	$	38,565	$	—		$	—		$	38,565		$	38,565
Held-to-maturity securities	—		54,765			—			54,765			54,347
Loans held for sale	—		3,374			—			3,374			3,302
Net loans and leases held for investment	—		—			1,555,033			1,555,033			1,550,770
Mortgage servicing rights	—		—			6,941			6,941			5,509
Other real estate owned	—		955			—			955			955
Total assets	$	38,565	$	59,094		$	1,561,974		$	1,659,633		$	1,653,448
Liabilities:
Deposits:
Demand and savings deposits, non-maturity	$	1,608,748	$	—		$	—		$	1,608,748		$	1,608,748
Time deposits	—		254,224			—			254,224			252,593
Total deposits	1,608,748		254,224			—			1,862,972			1,861,341
Short-term borrowings	—		38,631			—			38,631			41,974
Total liabilities	$	1,608,748	$	292,855		$	—		$	1,901,603		$	1,903,315
Off-Balance-Sheet:
Commitments to extend credit	$	—	$	(1,420	)	$	—		$	(1,420	)	$	—
	At December 31, 2013
(Dollars in thousands)	Level 1		Level 2			Level 3			Fair			Carrying
									Value			Amount
Assets:
Cash and short-term interest-earning assets	$	69,169	$	—		$	—		$	69,169		$	69,169
Held-to-maturity securities	—		66,853			—			66,853			66,003
Loans held for sale	—		2,267			—			2,267			2,267
Net loans and leases held for investment	—		—			1,477,945			1,477,945			1,461,620
Mortgage servicing rights	—		7,188			—			7,188			5,519
Other real estate owned	—		1,650			—			1,650			1,650
Total assets	$	69,169	$	77,958		$	1,477,945		$	1,625,072		$	1,606,228
Liabilities:
Deposits:
Demand and savings deposits, non-maturity	$	1,573,709	$	—		$	—		$	1,573,709		$	1,573,709
Time deposits	—		268,909			—			268,909			270,789
Total deposits	1,573,709		268,909			—			1,842,618			1,844,498
Short-term borrowings	—		35,687			—			35,687			37,256
Total liabilities	$	1,573,709	$	304,596		$	—		$	1,878,305		$	1,881,754
Off-Balance-Sheet:
Commitments to extend credit	$	—	$	(1,357	)	$	—		$	(1,357	)	$	—
The following valuation methods and assumptions were used by the Corporation in estimating its fair value for financial instruments measured at fair value on a non-recurring basis and financial instruments not measured at fair value on a recurring or non-recurring basis in the Corporation’s consolidated balance sheets but for which the fair value is required to be disclosed:
Cash and short-term interest-earning assets: The carrying amounts reported in the balance sheet for cash and due from banks, interest-earning deposits with other banks, and other short-term investments approximates those assets’ fair values. Cash and short-term interest-earning assets are classified within Level 1 in the fair value hierarchy.
Held-to-maturity securities: Fair values for the held-to-maturity investment securities are estimated by using pricing models or quoted prices of securities with similar characteristics and are classified in Level 2 in the fair value hierarchy.
Loans held for sale: The fair value of the Corporation’s mortgage loans held for sale are generally determined using a pricing model based on current market information obtained from external sources, including interest rates, bids or indications provided by market participants on specific loans that are actively marketed for sale. These loans are primarily residential mortgage loans and are generally classified in Level 2 due to the observable pricing data. Loans held for sale are carried at the lower of cost or estimated fair value. There were no valuation adjustments for loans held for sale at December 31, 2014 and 2013.
Loans and leases held for investment: The fair values for loans are estimated using discounted cash flow analyses, using a discount rate based on current interest rates at which similar loans with similar terms would be made to borrowers and include components for credit risk, operating expense and embedded prepayment options. An overall valuation adjustment is made for specific credit risks in addition to general portfolio risk and is significant to the valuation. As permitted, the fair value of the loans and leases are not based on the exit price concept as discussed in the first paragraph of this note. Loans and leases are classified within Level 3 in the fair value hierarchy.
Impaired loans held for investment: Impaired loans held for investment include those collateral-dependent loans for which the practical expedient was applied, resulting in a fair-value adjustment to the loan. Impaired loans are evaluated and valued at the time the loan is identified as impaired, at the lower of cost or fair value. Fair value is measured based on the value of the collateral securing these loans less costs to sell and is classified at a Level 3 in the fair value hierarchy. The fair value of collateral is based on appraisals performed by qualified licensed appraisers hired by the Corporation. At December 31, 2014, impaired loans held for investment had a carrying amount of $56.2 million with a valuation allowance of $998 thousand. At December 31, 2013, impaired loans held for investment had a carrying amount of $58.3 million with a valuation allowance of $3.0 million.
Mortgage servicing rights: The Corporation estimates the fair value of mortgage servicing rights using discounted cash flow models that calculate the present value of estimated future net servicing income. The model uses readily available prepayment speed assumptions for the interest rates of the portfolios serviced. Mortgage servicing rights were classified within Level 2 of the valuation hierarchy at December 31, 2013. The Corporation’s valuation model has not changed from December 31, 2013; however, management’s assessment of the inputs has resulted in mortgage servicing rights being classified within Level 3 of the valuation hierarchy at December 31, 2014. The Corporation reviews the mortgage servicing rights portfolio on a quarterly basis for impairment and the mortgage servicing rights are carried at the lower of amortized cost or estimated fair value. At December 31, 2014, mortgage servicing rights had a carrying amount of $5.5 million with no valuation allowance. At December 31, 2013, mortgage servicing rights had a carrying amount of $5.8 million with a valuation allowance of $250 thousand.
Goodwill and other identifiable assets: Certain non-financial assets subject to measurement at fair value on a non-recurring basis include goodwill and other identifiable intangible assets. The Corporation completed an annual impairment test for goodwill and other intangibles during the fourth quarter of 2014. There was no goodwill impairment and no material impairment of identifiable intangibles recorded.
Other real estate owned: The fair value of other real estate owned is estimated based upon its appraised value less costs to sell. The real estate is stated at an amount equal to the loan balance prior to foreclosure, plus costs incurred for improvements to the property but no more than the fair value of the property, less estimated costs to sell. New appraisals are generally obtained on an annual basis. Other real estate owned is classified within Level 2 of the valuation hierarchy.
Deposit liabilities: The fair values for demand and savings accounts, with no stated maturities, is the amount payable on demand at the reporting date (carrying value) and are classified within Level 1 in the fair value hierarchy. The fair values for time deposits with fixed maturities are estimated by discounting the final maturity using interest rates currently offered for deposits with similar remaining maturities. Time deposits are classified within Level 2 in the fair value hierarchy.
Short-term borrowings: The fair value of customer repurchase agreements and federal funds purchased are estimated using current market rates for similar borrowings and are classified within Level 2 in the fair value hierarchy.
Off-balance-sheet instruments: Fair values for the Corporation’s off-balance-sheet instruments are based on the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing and are classified within Level 2 in the fair value hierarchy.

Restructuring_Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring Charges
	During the first quarter of 2013, the Corporation implemented a company-wide restructuring plan which reduced staffing levels by 3.4% and included the announced closure and consolidation of its Silverdale financial service center, effective May 3, 2013, into the Hilltown and Perkasie locations. As a result, the Corporation recorded $539 thousand in restructuring charges during the first quarter of 2013, which consisted of $437 thousand in severance and $102 thousand in fixed asset retirement expenses. These charges are included in restructuring charges, a component of non-interest expense, within the consolidated statement of income. The restructuring involved strategic changes to ensure the Corporation is effectively managing costs, improving efficiencies and evolving the business to meet the need of all its stakeholders.
	A roll-forward of the accrued restructuring expense is as follows:
	(Dollars in thousands)	Severance
	Accrued at January 1, 2013	$	—
	Restructuring charge	437
	Payments	(432		)
	Adjustment of restructuring charge	(5		)
	Accrued at December 31, 2013	$	—

Share_Repurchase_Plan

Share Repurchase Plan	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Share Repurchase Plan	Share Repurchase Plan
	During 2007, the Corporation’s Board of Directors approved a share repurchase program for the repurchase of up to 643,782 shares of common stock. During the nine months ended September 30, 2013, the Corporation repurchased 540,285 shares at a cost of $9.9 million under the 2007 plan. At September 30, 2013, this share repurchase plan was substantially completed.
	On October 23, 2013, the Corporation’s Board of Directors approved a new stock repurchase plan for the repurchase of up to 800,000 shares, or approximately 5% of the shares outstanding. Under this plan, the Corporation will repurchase shares of its common stock from time to time through open market purchases, tender offers, privately negotiated purchases or other means. The share repurchase program does not obligate the Corporation to acquire any particular amount of common stock. The program has no scheduled expiration date and the Board of Directors has the right to suspend or discontinue the program at any time.
	The Corporation repurchased 110,997 shares under the 2013 plan during the year ended December 31, 2014, at a cost of $2.0 million. At December 31, 2014, total shares outstanding were 16,221,607.

Regulatory_Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters
	The Corporation and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Corporation’s and the Bank’s financial statements. Capital adequacy guidelines, and additionally for the Bank the prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators about components, risk weighting and other factors.
	Quantitative measures established by regulation to ensure capital adequacy require the Corporation and the Bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined).
	(Dollars in thousands)	Actual				For Capital Adequacy				To Be Well-Capitalized
						Purposes				Under Prompt
										Corrective Action
										Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	At December 31, 2014
	Total Capital (to Risk-Weighted Assets):
	Corporation	$	249,388	12.91	%	$	154,589	8	%	$	193,237	10	%
	Bank	232,080		12.15		152,796		8	%	190,995		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	227,907		11.79		77,295		4	%	115,942		6	%
	Bank	210,816		11.04		76,398		4	%	114,597		6	%
	Tier 1 Capital (to Average Assets):
	Corporation	227,907		10.55		86,371		4	%	107,964		5	%
	Bank	210,816		9.8		86,005		4	%	107,506		5	%
	At December 31, 2013
	Total Capital (to Risk-Weighted Assets):
	Corporation	$	256,329	13.9	%	$	147,568	8	%	$	184,460	10	%
	Bank	238,336		13.06		145,991		8	%	182,489		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	232,946		12.63		73,784		4	%	110,676		6	%
	Bank	215,497		11.81		72,995		4	%	109,493		6	%
	Tier 1 Capital (to Average Assets):
	Corporation	232,946		10.85		85,876		4	%	107,346		5	%
	Bank	215,497		10.11		85,277		4	%	106,597		5	%
	At December 31, 2014 and December 31, 2013, management believes that the Corporation and the Bank continued to meet all capital adequacy requirements to which they are subject. The Corporation, like other bank holding companies, currently is required to maintain Tier 1 Capital and Total Capital (the sum of Tier 1, Tier 2 and Tier 3 capital) equal to at least 4.0% and 8.0%, respectively, of its total risk-weighted assets (including various off-balance-sheet items, such as standby letters of credit). The Bank, like other depository institutions, is required to maintain similar capital levels under capital adequacy guidelines. For a depository institution to be considered “well capitalized” under the regulatory framework for prompt corrective action, its Tier 1 and Total Capital ratios must be at least 6.0% and 10.0% on a risk-adjusted basis, respectively. At December 31, 2014, the Bank is categorized as “well capitalized” under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the Bank’s category.
	In July 2013, the federal bank regulatory agencies adopted final rules revising the agencies’ capital adequacy guidelines and prompt corrective action rules, designed to enhance such requirements and implement the revised standards of the Basel Committee on Banking Supervision, commonly referred to as Basel III. The July 2013 final rules generally implement higher minimum capital requirements, add a new common equity Tier 1 capital requirement, and establish criteria that instruments must meet to be considered common equity Tier 1 capital, additional Tier 1 capital or Tier 2 capital. The new minimum capital to risk-adjusted assets requirements include a common equity Tier 1 capital ratio of 4.5% (6.5% to be considered “well capitalized”) and a Tier 1 capital ratio of 6.0%, increased from 4.0% (and increased from 6.0% to 8.0% to be considered “well capitalized”); the total capital ratio remains at 8.0% under the new rules (10.0% to be considered “well capitalized”). Under the new rules, in order to avoid limitations on capital distributions (including dividend payments and certain discretionary bonus payments to executive officers), a banking organization must hold a capital conservation buffer comprised of common equity Tier 1 capital above its minimum risk-based capital requirements in an amount greater than 2.5% of total risk-weighted assets. The final rules permit institutions, other than certain large institutions, to elect to continue to treat certain components of accumulated other comprehensive income as permitted under the current general risk-based capital rules, and not reflect unrealized gains and losses on available-for-sale securities in common equity Tier 1 calculations. The new minimum capital requirements became effective on January 1, 2015. The capital contribution buffer requirements phase in over a three-year period beginning January 1, 2016. Management believes that, as of December 31, 2014, the Corporation and the Bank would have met the capital adequacy requirements under Basel III if such requirements had been in effect. The Corporation and the Bank expect to be well capitalized upon the adoption of BASEL III in 2015. The Corporation will continue to analyze the impact of the new rules as it grows and as the capital conservation buffer requirements are phased in.
	Dividends and Other Restrictions
	The primary source of the Corporation’s dividends paid to its shareholders is from the earnings of its subsidiaries paid to the Corporation in the form of dividends.
	The approval of the Federal Reserve Board of Governors is required for a state bank member in the Federal Reserve system to pay dividends if the total of all dividends declared in any calendar year exceeds the Bank’s net profits (as defined) for that year combined with its retained net profits for the preceding two calendar years. Under this formula, the Bank can declare dividends in 2015 without approval of the Federal Reserve Board of Governors of approximately $12.8 million plus an additional amount equal to the Bank’s net profits for 2015 up to the date of any such dividend declaration.
	Federal Reserve Board policy applicable to the holding company also provides that, as a general matter, a bank holding company should inform the Federal Reserve and should eliminate, defer or significantly reduce the holding company’s dividends if the holding company’s net income for the preceding four quarters, net of dividends paid during the period, is not sufficient to fully fund the dividends, the holding company’s prospective rate of earnings retention is inconsistent with capital needs and overall current and prospective financial condition, or the holding company will not meet, or is in danger of not meeting, its minimum regulatory capital adequacy ratios. Federal Reserve Board policy also provides that a bank holding company should inform the Federal Reserve reasonably in advance of declaring or paying a dividend that exceeds earnings for the period or that could result in a material adverse change to the organization’s capital structure.
	The Federal Reserve Act requires that extension of credit by the Bank to certain affiliates, including the Corporation (parent), be secured by readily marketable securities, that extension of credit to any one affiliate be limited to 10% of the Bank’s capital and surplus (as defined), and that extensions of credit to all such affiliates be limited to 20% of the Bank’s capital and surplus.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	In the ordinary course of business, the Corporation has made loans and commitments to extend credit to certain directors and executive officers of the Corporation and companies in which directors have an interest (Related Parties). These loans and commitments have been made on substantially the same terms, including interest rates and collateral, as those prevailing at the same time for comparable transactions with customers not related to the lender and did not involve more than the normal risk of collectability or present other unfavorable terms.
	The following table provides a summary of activity for loans to Related Parties during the year ended December 31, 2014:
	(Dollars in thousands)
	Balance at January 1, 2014	$	27,802
	Additions	10,551
	Amounts collected and other reductions	(7,668		)
	Balance at December 31, 2014	$	30,685
	The Corporation paid $19 thousand during 2014 to Penn Foundation Inc. for the Employee Assistance Program, in the normal course of business on substantially the same terms as available for others. Margaret Zook, a director of the Corporation, is on the Board of Directors of Penn Foundation Inc.
	The following table provides additional information regarding transactions with Related Parties:
	(Dollars in thousands)	At December 31, 2014
	Commitments to extend credit	$	16,453
	Standby and commercial letters of credits	223
	Deposits received	10,342

Segment_Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting
	At December 31, 2014, the Corporation has three reportable business segments: Banking, Wealth Management and Insurance. The Corporation determines its segments based primarily upon product and service offerings, through the types of income generated and the regulatory environment. This is strategically how the Corporation operates and has positioned itself in the marketplace. Accordingly, significant operating decisions are based upon analysis of each of these segments. At December 31, 2014, these segments meet the quantitative thresholds for separate disclosure as a business segment. Non-reportable segments include Univest Delaware, the parent holding company and intercompany eliminations, and are included in the "Other" segment. Prior to 2014, the Corporation had only one reportable segment, Community Banking. During 2014, the Corporation acquired Girard Partners and Sterner Insurance and realigned its investment and trust operations into its Wealth Management Reporting unit; this resulted in the three reportable segments of Banking, Wealth Management and Insurance.
	The Corporation's Banking segment consists of commercial and retail banking. The Wealth Management segment consists of investment advisory services, retirement plan services, trust, municipal pension services and broker/dealer services. The Insurance segment consists of commercial lines, personal lines, benefits and human resources consulting.
	Each segment generates revenue from a variety of products and services it provides. Examples of products and services provided for each reportable segment are indicated below.
	Ÿ	The Banking segment provides financial services to consumers, businesses and governmental units. These services include a full range of banking services such as deposit taking, loan origination and servicing, mortgage banking, other general banking services and equipment lease financing.
	Ÿ	The Wealth Management segment offers trust and investment advisory services, guardian and custodian of employee benefits and other trust and brokerage services, as well as a registered investment advisory managing private investment accounts for both individuals and institutions.
	Ÿ	The Insurance segment includes a full-service insurance brokerage agency offering commercial property and casualty insurance, group life and health coverage, employee benefit solutions and personal insurance lines.
	The accounting policies, used in the disclosure of the operating segments, are the same as those described in Note 1, “Summary of Significant Accounting Policies".
	The following tables provide reportable segment-specific information and reconciliations to consolidated financial information for the years ended December 31, 2014, 2013 and 2012. Prior period information is shown for comparative purposes as if the realignment of Wealth Management occurred at the beginning of each period.
	(Dollars in thousands)	Banking		Wealth Management		Insurance		Other			Consolidated
	For the Year Ended December 31, 2014
	Interest income	$	75,850	$	1	$	—	$	34		$	75,885
	Interest expense	3,998		—		—		(2		)	3,996
	Net interest income	71,852		1		—		36			71,889
	Provision for loan and lease losses	3,607		—		—		—			3,607
	Noninterest income	16,170		19,918		12,038		525			48,651
	Noninterest expense*	63,120		13,855		11,435		(1,156		)	87,254
	Income before income taxes	21,295		6,064		603		1,717			29,679
	Income taxes	4,043		2,269		256		880			7,448
	Net income	$	17,252	$	3,795	$	347	$	837		$	22,231
	Total assets	$	2,154,485	$	34,195	$	22,930	$	23,711		$	2,235,321
	Capital expenditures	$	2,824	$	100	$	593	$	169		$	3,686
	For the Year Ended December 31, 2013
	Interest income	$	77,517	$	1	$	—	$	61		$	77,579
	Interest expense	4,641		—		—		476			5,117
	Net interest income	72,876		1		—		(415		)	72,462
	Provision for loan and lease losses	11,228		—		—		—			11,228
	Noninterest income	22,053		14,938		9,959		(166		)	46,784
	Noninterest expense*	60,759		10,079		8,749		1,546			81,133
	Income (expense) before income taxes	22,942		4,860		1,210		(2,127		)	26,885
	Income tax expense (benefit)	4,255		1,850		497		(906		)	5,696
	Net income	$	18,687	$	3,010	$	713	$	(1,221	)	$	21,189
	Total assets	$	2,129,314	$	22,737	$	19,524	$	19,984		$	2,191,559
	Capital expenditures	$	2,679	$	13	$	46	$	692		$	3,430
	For the Year Ended December 31, 2012
	Interest income	$	80,568	$	3	$	3	$	80		$	80,654
	Interest expense	6,983		—		—		1,191			8,174
	Net interest income	73,585		3		3		(1,111		)	72,480
	Provision for loan and lease losses	10,035		—		—		—			10,035
	Noninterest income	18,018		12,906		8,079		1,257			40,260
	Noninterest expense*	57,917		9,626		7,782		957			76,282
	Income (expense) before income taxes	23,651		3,283		300		(811		)	26,423
	Income tax expense (benefit)	4,318		1,266		113		(146		)	5,551
	Net income	$	19,333	$	2,017	$	187	$	(665	)	$	20,872
	Capital expenditures	$	2,950	$	53	$	37	$	190		$	3,230
	*Includes an allocation of general and administrative expenses from both the parent holding company and the Bank. Generally speaking, these expenses are allocated based upon number of employees and square footage usage.

Condensed_Financial_Informatio

Condensed Financial Information - Parent Company Only	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information - Parent Company Only	Condensed Financial Information - Parent Company Only
	Condensed financial statements of the Corporation, parent company only, follow:
	(Dollars in thousands)	At December 31,
	Balance Sheets	2014			2013
	Assets:
	Cash and due from banks	$	3,120		$	2,999
	Investments in securities	1,336			2,347
	Investments in subsidiaries, at equity in net assets:
	Bank	283,166			271,147
	Non-banks	—			—
	Other assets	21,115			17,658
	Total assets	$	308,737		$	294,151
	Liabilities:
	Dividends payable	$	3,243		$	3,257
	Other liabilities	20,940			10,388
	Total liabilities	24,183			13,645
	Shareholders' equity:	284,554			280,506
	Total liabilities and shareholders' equity	$	308,737		$	294,151
	(Dollars in thousands)	For the Years Ended December 31,
	Statements of Income	2014			2013			2012
	Dividends from bank	$	12,482		$	18,482		$	20,482
	Dividends from non-bank	—			—			1,200
	Other-than-temporary impairment on equity securities	—			—			(13		)
	Net gain on sales of securities	306			644			70
	Loss on termination of interest rate swap	—			(1,866		)	—
	Other income	18,334			18,306			17,463
	Total operating income	31,122			35,566			39,202
	Operating expenses	16,924			19,203			18,323
	Income before income tax expense (benefit) and equity in undistributed income (loss) of subsidiaries	14,198			16,363			20,879
	Income tax expense (benefit)	880			(903		)	(143		)
	Income before equity in undistributed income (loss) of subsidiaries	13,318			17,266			21,022
	Equity in undistributed income (loss) of subsidiaries:
	Bank	8,913			3,929			(140		)
	Non-banks	—			(6		)	(10		)
	Net income	$	22,231		$	21,189		$	20,872
	(Dollars in thousands)	For the Years Ended December 31,
	Statements of Cash Flows	2014			2013			2012
	Cash flows from operating activities:
	Net income	$	22,231		$	21,189		$	20,872
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net (income) loss of subsidiaries	(8,913		)	(3,923		)	150
	Other-than-temporary impairment on equity securities	—			—			13
	Net gain on sales of securities	(306		)	(644		)	(70		)
	Loss on termination of interest rate swap	—			1,866			—
	Bank owned life insurance income	(238		)	(1,070		)	(255		)
	Depreciation of premises and equipment	364			344			358
	Stock based compensation	1,141			978			1,267
	Contributions to pension and other postretirement benefit plans	(254		)	(2,243		)	(8,215		)
	Decrease in other assets	714			671			6,270
	(Decrease) increase in other liabilities	(639		)	(2,426		)	2,451
	Net cash provided by operating activities	14,100			14,742			22,841
	Cash flow from investing activities:
	Proceeds from sales of securities	1,131			1,244			2,666
	Liquidation of subsidiary, net of cash acquired	—			15,011			1,096
	Proceeds from bank owned life insurance	—			772			178
	Other, net	(281		)	(713		)	1,280
	Net cash provided by investing activities	850			16,314			5,220
	Cash flows from financing activities:
	Repayment of long-term debt	—			(375		)	(1,500		)
	Payment for repurchase of trust preferred securities	—			(20,619		)	—
	Purchases of treasury stock	(4,605		)	(12,012		)	(2,319		)
	Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit plans	2,462			2,422			2,515
	Proceeds from exercise of stock options	310			—			—
	Cash dividends paid	(12,996		)	(10,029		)	(16,755		)
Net cash used in financing activities	(14,829		)	(40,613		)	(18,059		)
Net increase (decrease) in cash and due from financial institutions	121			(9,557		)	10,002
Cash and due from financial institutions at beginning of year	2,999			12,556			2,554
Cash and due from financial institutions at end of year	$	3,120		$	2,999		$	12,556
Supplemental disclosures of cash flow information:
Cash paid during the year for:
Interest	$	2		$	754		$	1,194
Income tax, net of refunds received	5,300			5,017			1,180

Quarterly_Financial_Data_unaud

Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Quarterly Financial Data (Unaudited)
	The unaudited results of operations for the quarters for the years ended December 31, 2014 and 2013 were as follows:
	(Dollars in thousands, except per share data)
	2014 Quarterly Financial Data:	Fourth		Third		Second		First
	Interest income	$	18,995	$	19,219	$	18,725	$	18,946
	Interest expense	1,039		978		981		998
	Net interest income	17,956		18,241		17,744		17,948
	Provision for loan and lease losses	648		233		1,251		1,475
	Net interest income after provision for loan and lease losses	17,308		18,008		16,493		16,473
	Noninterest income	12,076		12,510		11,924		12,141
	Noninterest expense	22,562		22,019		21,790		20,883
	Income before income taxes	6,822		8,499		6,627		7,731
	Income taxes	1,632		2,264		1,547		2,005
	Net income	$	5,190	$	6,235	$	5,080	$	5,726
	Per share data:
	Basic	$	0.32	$	0.38	$	0.31	$	0.35
	Diluted	$	0.32	$	0.38	$	0.31	$	0.35
	Dividends per share	$	0.2	$	0.2	$	0.2	$	0.2
	2013 Quarterly Financial Data:	Fourth		Third		Second		First
	Interest income	$	19,172	$	19,457	$	19,461	$	19,489
	Interest expense	1,080		1,138		1,353		1,546
	Net interest income	18,092		18,319		18,108		17,943
	Provision for loan and lease losses	1,614		4,094		3,446		2,074
	Net interest income after provision for loan and lease losses	16,478		14,225		14,662		15,869
	Noninterest income	11,116		13,202		10,991		11,475
	Noninterest expense	21,623		19,988		19,286		20,236
	Income before income taxes	5,971		7,439		6,367		7,108
	Income taxes	1,049		1,400		1,537		1,710
	Net income	$	4,922	$	6,039	$	4,830	$	5,398
	Per share data:
	Basic	$	0.3	$	0.36	$	0.29	$	0.32
	Diluted	$	0.3	$	0.36	$	0.29	$	0.32
	Dividends per share	$	0.2	$	0.2	$	0.2	$	0.2

Subsequent_Event

Subsequent Event	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event
	Valley Green Bank
	On January 1, 2015, the Corporation completed its acquisition of Valley Green Bank. The merger of Valley Green Bank with and into the Bank was effected pursuant to the terms and conditions of the Merger Agreement dated June 17, 2014. Pursuant to the Merger Agreement, each share of Valley Green Bank common stock was cancelled and converted into the right to receive 1.3541 shares of Univest common stock, $5 par value, with any fractional share entitled to payment in cash. As a result, the Corporation delivered approximately 3,787,866 shares of the Corporation's common stock to the former shareholders of Valley Green Bank. Valley Green Bank outstanding stock options of 122,377 were exchanged for cash and related payroll taxes of $2.2 million. Approximately $3 thousand in cash was paid for fractional shares.
	The transaction is being accounted for using the acquisition method of accounting, which requires the Corporation to allocate the total consideration transferred to the assets acquired and liabilities assumed, based on their respective fair values at the merger date, with remaining excess consideration recorded as goodwill. The fair value estimates are subject to adjustment if additional information becomes available. Such adjustments, may change the amount of the purchase price allocation to goodwill while changes to other assets and liabilities may impact the statement of income due to adjustments in the yield and/or amortization/accretion of the adjusted assets and liabilities.
	The following table summarizes the consideration paid for Valley Green Bank and the fair value of assets acquired and liabilities assumed at the acquisition date:
	(Dollars in thousands, except share data)
	Purchase price consideration in common stock:
	Valley Green common shares outstanding	2,797,454
	Exchange ratio	1.3541
	Univest shares issued	3,787,866
	Univest closing stock price at December 31, 2014	$	20.24
	Purchase price assigned to Valley Green common shares exchanged for Univest stock				$	76,667
	Purchase price assigned to cash in lieu of fractional shares				3
	Purchase price assigned to Valley Green options settled for cash				2,236
	Total purchase price				$	78,906
	Fair value of assets acquired:
	Cash and due from banks	$	4,919
	Federal funds sold	17,442
	Investment securities available-for-sale	12,766
	Loans held for investment	382,892
	Premises and equipment, net	3,102
	Core deposit intangible	1,867
	Accrued interest receivable and other assets	3,779
	Total identifiable assets				426,767
	Fair value of liabilities assumed:
	Deposits - noninterest bearing	$	49,826
	Deposits - interest bearing	336,086
	Change in control accrued payments	2,070
	Accrued interest payable and other liabilities	1,792
	Total liabilities				389,774
	Net identifiable net assets				36,993
	Goodwill resulting from merger (1)				$	41,913
	(1) - Goodwill is not expected to be deductible for federal income tax purposes. The goodwill is allocated to the Banking business segment.
	The following is a description of the valuation methodologies used to estimate the fair values of major categories of assets acquired and liabilities assumed. In many cases, determining the fair value of the acquired assets and assumed liabilities required the Corporation to estimate cash flows expected to result from those assets and liabilities and to discount those cash flows at appropriate rates of interest, which required the utilization of significant estimates and judgment in accounting for the acquisition.
	Cash and due from banks and federal funds sold: The estimated fair values of cash and due from banks and federal fund sold approximated their stated value.
	Investment securities available-for-sale: The estimated fair values of the investment securities available for sale, comprised of U.S. government and agencies, were determined using Level 2 inputs in the fair value hierarchy. The fair values were determined using independent pricing services and market-participating brokers. The Corporation’s independent pricing service utilized evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information for structured securities, cash flow and, when available, loan performance data. Because many fixed income securities do not trade on a daily basis, the pricing service’s evaluated pricing applications apply information as applicable through processes, such as benchmarking of like securities, sector groupings, and matrix pricing, to prepare evaluations. Management reviewed the data and assumptions used in pricing the securities.
	Loans held for investment: The most significant fair value determination related to the valuation of acquired loans. The acquisition resulted in loans acquired with and without evidence of credit quality deterioration. There was no carryover related allowance for loan and lease losses.
	The acquired loan portfolio was valued based on current guidance which defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Level 3 inputs were utilized to value the portfolio and included the use of present value techniques employing cash flow estimates and the incorporated assumptions that marketplace participants would use in estimating fair values. In instances where reliable market information was not available, the Corporation used its own assumptions in an effort to determine reasonable fair value. Specifically, management utilized three separate fair value analyses which a market participant would employ in estimating the total fair value adjustment. The three separate fair valuation methodologies used were: 1) interest rate loan fair value analysis; 2) general credit fair value adjustment; and 3) specific credit fair value adjustment.
	For loans acquired without evidence of credit quality deterioration, the Corporation prepared the interest rate fair value analysis. Loans were grouped by characteristics such as loan type, term, collateral and rate. Market rates for similar loans were obtained from various external data sources and reviewed by management for reasonableness. The average of these rates was used as the fair value interest rate a market participant would utilize. A present value approach was utilized to calculate the interest rate fair value adjustment. Additionally a general credit fair value adjustment was calculated using a two part general credit fair value analysis: 1) expected lifetime losses; and 2) estimated fair value adjustment for qualitative factors. The expected lifetime losses were calculated using an average of historical losses of the Bank, Valley Green Bank and peer banks. The adjustment related to qualitative factors was impacted by general economic conditions and the risk related to lack of specific familiarity with Valley Green Bank's underwriting process. Valley Green's loan portfolio without evidence of credit quality deterioration was recorded at a current fair value of $381.5 million. A fair value premium of $4.3 million was recognized to reflect the fair values of loans. A fair value discount of $5.8 million was recognized to reflect the general credit risk of the loan portfolio. The adjustment will be substantially recognized as interest income over approximately 10 years on a level yield basis amortization method based upon the expected life of the loans.
	For loans acquired with evidence of credit quality deterioration the Corporation prepared a specific credit fair value adjustment. Management reviewed the acquired loan portfolio for loans meeting the definition of an impaired loan with deteriorated credit quality. Loans meeting this definition were reviewed by comparing the contractual cash flows to expected collectible cash flows. The aggregate expected cash flows less the acquisition date fair value results in an accretable yield amount. The accretable yield amount will be recognized over the life of the loans on a level yield basis as an adjustment to yield.
	At the acquisition date, the Corporation recorded $1.4 million of acquired impaired loans subject to a nonaccretable discount difference of $2.8 million. The aggregate expected cash flows less the acquisition date fair value results in an accretable yield amount of $291 thousand, which will be recognized over the life of the loans on a level yield basis as an adjustment to yield.
	The following is a summary of the acquired impaired loans at January 1, 2015 resulting from the merger with Valley Green:
	(Dollars in thousands)
	Contractually required principal and interest payments	$	4,539
	Contractual cash flows not expected to be collected (nonaccretable difference)	(2,848		)
	Cash flows expected to be collected	1,691
	Interest component of expected cash flows (accretable difference)	(291		)
	Fair value of loans acquired with a deterioration of credit quality	$	1,400
	Bank premises - leased: The Corporation assumed five facility lease contracts and no owned properties. The fair value of the lease contracts represents the present value of the pre-tax differential between the expected contractual payments and current market rate lease payments to the first lease termination date discounted by an assumed required rate of return.
	Core deposit intangible: Core deposit intangible represents the value assigned to demand, interest checking, money market and savings accounts acquired as part of an acquisition. The core deposit intangible fair value represents the future economic benefit, including the present value of future tax benefits, of the potential cost savings from acquiring core deposits as part of an acquisition compared to the cost alternative funding sources and was valued utilizing Level 3 inputs. The core deposit intangible of $1.9 million will be amortized over an estimated life of 10 years.
	Deposits: The fair values of demand and saving deposits, with no stated maturities, approximated the carrying value as these accounts are payable on demand. The fair values of time deposits with fixed maturities were estimated by discounting the final maturity using current market interest rate for similar instruments. A fair value premium of $686 thousand was recognized and will be recognized as a reduction to interest expense using a level yield method over the life of the time deposit. The fair value of time deposits were determined using Level 2 inputs in the fair value hierarchy.
	Deferred tax assets and liabilities: Deferred tax assets and liabilities were established for purchase accounting fair value adjustments as the future amortization/accretion of these adjustments represent temporary differences between book income and taxable income.
	Direct costs related to the acquisition were expensed as incurred. During the year ended December 31, 2014, the Corporation incurred $1.2 million of Valley Green Bank acquisition-related expenses, which have been separately stated in the Corporation's consolidated statements of income.
	Supplemental Pro Forma Financial Information (unaudited)
	The following unaudited pro forma combined consolidated financial information for the years ended December 31, 2014 and 2013 combine the historical consolidated results of the Corporation and Valley Green Bank and give effect to the merger as if the merger occurred on January 1, 2014 and January 1, 2013, respectively. The pro forma information has been prepared to include the estimated adjustments necessary to record the assets and liabilities of Valley Green Bank at their respective fair values and are subject to adjustment if additional information becomes available. Such adjustments, may change the amount of the purchase price allocation to goodwill while changes to other assets and liabilities may impact the statement of income due to adjustments in the yield and/or amortization/accretion of the adjusted assets and liabilities. Furthermore, the unaudited proforma information does not reflect management’s estimate of any revenue-enhancing opportunities or anticipated cost savings
	The pro forma data is not necessarily indicative of the operating results that the Corporation would have achieved had it completed the merger as of the beginning of the period presented and should not be considered as representative of future operations. The unaudited pro forma data presented below is based on, and should be read together with, the historical financial information of the Corporation included in this Form 10-K for the indicated periods and the historical information of Valley Green Bank included in the Corporation's Current Report on Form 8-K filed with the SEC on January 7, 2015.
		Pro Forma For the Years Ended December 31,
	(Dollars in thousands, except share data)	2014				2013
	Net interest income	$	92,356			$	89,897
	Noninterest income	49,325				47,550
	Noninterest expense	98,792				90,456
	Net income	27,503				26,557
	Earnings per share
	Basic	$	1.37			$	1.3
Diluted	1.37				1.3

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization	Organization
	Univest Corporation of Pennsylvania (the Corporation) through its wholly owned subsidiary, Univest Bank and Trust Co. (the Bank), is engaged in domestic commercial and retail banking services and provides a full range of community banking and trust services to its customers. The Bank wholly owns Univest Capital, Inc., which provides lease financing, and Delview, Inc., who through its subsidiaries, Univest Investments, Inc., Univest Insurance, Inc. and Girard Partners provides financial planning, investment management, investment advisory, insurance products and brokerage services. Univest Investments, Inc., Univest Insurance, Inc. and Univest Capital, Inc. were formed to enhance the traditional banking and trust services provided by the Bank, along with the acquisition of Girard Partners.
	At December 31, 2014, the Corporation has three reportable business segments: Banking, Wealth Management and Insurance. The Corporation determines its segments based primarily upon product and service offerings, through the types of income generated and the regulatory environment. This is strategically how the Corporation operates and has positioned itself in the marketplace. Accordingly, significant operating decisions are based upon analysis of each of these segments. At December 31, 2014, these segments meet the quantitative thresholds for separate disclosure as a business segment. For more detailed discussion and financial information on the business segments, see Note 23 “Segment Reporting”.
	The Bank serves Montgomery, Bucks and Chester Counties and the Lehigh Valley of Pennsylvania through thirty-one banking offices and provides banking and trust services to the residents and employees of twelve retirement communities. With the acquisition of Valley Green Bank effective January 1, 2015, the Bank operates three full-service banking offices in the greater Philadelphia marketplace. Banking services are also available on-line at the Corporation’s website at www.univest.net.
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of the Corporation and its wholly owned subsidiaries; the Corporation’s primary subsidiary is the Bank. All significant intercompany balances and transactions have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current-year presentation.
Use of Estimates	Use of Estimates
	The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (U.S. GAAP) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes include fair value measurement of investment securities available-for-sale and assessment for impairment of certain investment securities, reserve for loan and lease losses, valuation of goodwill and other intangible assets, mortgage servicing rights, deferred tax assets and liabilities, benefit plans and stock-based compensation expense.
Interest-earning Deposits with Other Banks	Interest-earning Deposits with Other Banks
	Interest-earning deposits with other banks consist of deposit accounts with other financial institutions generally having maturities of three months or less.
Investment Securities	Investment Securities
	Securities are classified as investment securities held-to-maturity and carried at amortized cost if management has the positive intent and ability to hold the securities to maturity. Securities purchased with the intention of recognizing short-term profits are placed in the trading account and are carried at fair value. The Corporation did not have any trading account securities at December 31, 2014 or 2013. Securities not classified as held-to-maturity or trading are designated securities available-for-sale and carried at fair value with unrealized gains and losses reflected in other comprehensive income, net of estimated income taxes. Realized gains and losses on the sale of investment securities are recognized using the specific identification method and are included in the consolidated statements of income. The amortization of premiums and accretion of discounts are included in interest income and calculated using the level yield method.
	Management evaluates debt securities, which are comprised of U.S. government, government sponsored agencies, municipalities, corporate bonds and other issuers, for other-than-temporary impairment by considering the current economic conditions, the length of time and the extent to which the fair value has been less than cost, interest rates and the bond rating of each security. All of the debt securities are rated as investment grade and management believes that it will not incur any losses. The unrealized losses on the Corporation’s investments in debt securities are temporary in nature since they are primarily related to market interest rates and are not related to the underlying credit quality of the issuers within our investment portfolio. The Corporation does not have the intent to sell the debt securities and believes it is more likely than not, that it will not have to sell the securities before recovery of their cost basis. The credit portion of any loss on debt securities is recognized through earnings and the noncredit portion of any loss related to debt securities that the Corporation does not intend to sell, and it is more likely than not that the Corporation will not be required to sell the securities prior to recovery, is recognized in other comprehensive income, net of tax.
	The Corporation evaluates its equity securities for other-than-temporary impairment and recognizes other-than-temporary impairment charges when it has determined that it is probable that the fair value of certain equity securities will not recover to the Corporation’s cost basis in the individual securities within a reasonable period of time due to a decline in the financial stability of the underlying companies. Management evaluates the near-term prospects of the issuers in relation to the severity and duration of the impairment. The Corporation has the intent and ability to hold these securities until recovery of the Corporation’s cost basis occurs.
Loans and Leases	Loans and Leases
	Loans and leases are stated at the principal amount less net deferred fees and unearned discount. Interest income on commercial, consumer, and mortgage loans is recorded on the outstanding balance method, using actual interest rates applied to daily principal balances. Loan commitments are made to accommodate the financial needs of the customers. These commitments represent off-balance sheet items that are unfunded. Accrual of interest income on loans and leases ceases when collectability of interest and/or principal is questionable. If it is determined that the collection of interest previously accrued is uncertain, such accrual is reversed and charged to current earnings. Loans and leases are considered past due based upon failure to comply with contractual terms.
	A loan or lease is typically classified as nonaccrual when the contractual payment of principal or interest has become 90 days past due or management has serious doubts about the further collectability of principal or interest, even though the loan or lease is currently performing. When a loan or lease, including a loan or lease that is impaired, is classified as nonaccrual, the accrual of interest on such a loan or lease is discontinued. A loan or lease may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan or lease is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest payments received on nonaccrual loans and leases are either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. Loans and leases are usually restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time, and the ultimate collectability of the total contractual principal and interest is no longer in doubt. A loan or lease is considered impaired when, based on current information and events, it is probable that the Corporation will be unable to collect all amounts due, including principal and interest, according to the contractual terms of the loan agreement. Interest on impaired loans and leases, which are not classified as nonaccrual, is recognized on the accrual basis.
Loan and Lease Fees	Loan and Lease Fees
	Fees collected upon loan or lease origination and certain direct costs of originating loans and leases are deferred and recognized over the contractual lives of the related loans and leases as yield adjustments using the interest method. Upon prepayment or other disposition of the underlying loans and leases before their contractual maturities, any associated unearned fees or unamortized costs are recognized.
Reserve for Loan and Lease Losses	Reserve for Loan and Lease Losses
	The reserve for loan and lease losses is maintained at a level that management believes is appropriate to absorb known and inherent losses in the loan and lease portfolio. Management’s methodology to determine the adequacy of and the additions to the reserve considers specific credit reviews, past loan and lease loss experience, current economic conditions and trends, and the volume, growth, and composition of the loan portfolio.
	The reserve for loan and lease loss analysis takes into consideration the growth of the loan and lease portfolio, the status of past-due loans and leases, current economic conditions, various types of lending activity, policies, real estate and other loan commitments, and significant changes in charge-off activity. Impaired loans, including nonaccrual loans and leases, troubled debt restructured loans and other accruing impaired loans are evaluated individually. All other loans and leases are evaluated as pools. Based on historical loss experience and qualitative factors, loss factors are determined giving consideration to the areas noted in the first paragraph and applied to the pooled loan and lease categories to develop the general or allocated portion of the reserve.
	The reserve for loan and lease losses is determined at the end of each quarter, and more frequently for management review purposes. Calculating the Corporation's reserve for loan and lease losses considers the Bank's loan portfolio utilizing historical loss data as a starting point, while evaluating the impact of environmental factors in a quantitative manner as they relate to the collectability of outstanding loan obligations. The Corporation utilizes a rolling eight-quarter migration analysis and loss emergence period analysis to determine the annualized net expected loan loss experience.
	Each quarter, the conditions that exist within the look-back period are compared to current conditions to support a conclusion as to which qualitative adjustments are (or are not) deemed necessary for each loan portfolio segment. These factors are evaluated subjectively based on management's experience and supported by the Corporation's defined analytical metrics/drivers relative to the historical look-back period. Factors include, but are not limited to, asset quality trends, portfolio growth trends, changes in lending policies and management, economic trends, concentrations of credit risk and the impact of collateral dependent lending.
	The reserve for loan and lease losses is based on management’s evaluation of the loan and lease portfolio under current economic conditions and such other factors, which deserve recognition in estimating loan and lease losses. This evaluation is inherently subjective, as it requires estimates including the amounts and timing of future cash flows expected to be received on impaired loans and leases that may be susceptible to significant change. Additions to the reserve arise from the provision for loan and lease losses charged to operations or from the recovery of amounts previously charged off. Loan and lease charge-offs reduce the reserve. Loans and leases are charged off when there has been permanent impairment or when in the opinion of management the full amount of the loan or lease will not be realized. Certain impaired loans are reported at the loan’s observable market price or the fair value of the collateral if the loan is collateral dependent, or for certain impaired loans, at the present value of expected future cash flows using the loan’s initial effective interest rate. For commercial impaired loans which are collateral dependent, the fair value of collateral is based on appraisals performed by qualified licensed appraisers hired by the Corporation less management’s estimated costs to sell. Appraisals are updated annually and obtained more frequently if changes in the property or market conditions warrant. Once an updated appraisal is received, if the fair value less estimated costs to sell is less than the carrying amount of the collateral dependent loan, a charge-off to the reserve for loan and lease losses is recorded for the difference.
	The reserve for loan and lease losses consists of an allocated reserve and an unallocated reserve. The allocated reserve is comprised of reserves established on specific loans and leases, and class reserves based on historical loan and lease loss experience and qualitative factors, current trends, and management assessments. The unallocated reserve supports other risk considerations not readily quantifiable through the allocated reserve metrics outlined above, as well as the inherent imprecision of the reserve for loan and lease losses model complexity. These considerations include, but are not limited to, fair value instability within the non-performing category, and the improving credit risk profile of performing loans individually measured for impairment.
	The specific reserve element is based on a regular analysis of impaired commercial and real estate loans. For these loans, the specific reserve established is based on an analysis of related collateral value, cash flow considerations and, if applicable, guarantor capacity.
	The class reserve element is determined by an internal loan and lease grading process in conjunction with associated allowance factors. The Corporation revises the class allowance factors whenever necessary, but no less than quarterly, in order to address improving or deteriorating credit quality trends or specific risks associated with a given loan or lease pool classification.
	The Corporation maintains a reserve in other liabilities for off-balance sheet credit exposures that currently are unfunded in categories with historical loss experience. In addition, the Bank's primary examiner, as a regular part of their examination process, may require the Bank to increase the level of reserves.
Premises and Equipment	Premises and Equipment
	Land is stated at cost, and premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method and charged to operating expenses over the estimated useful lives of the assets. The estimated useful life for new buildings constructed on land owned is forty years, and for new buildings constructed on leased land, is the lesser of forty years or the lease term including anticipated renewable terms. The useful life of purchased existing buildings is the estimated remaining useful life at the time of the purchase. Land improvements are considered to have estimated useful lives of fifteen years or the lease term including anticipated renewable terms. Furniture, fixtures and equipment have estimated useful lives ranging from three to ten years.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	The Corporation accounts for its acquisitions using the purchase accounting method. Purchase accounting requires the total purchase price to be allocated to the estimated fair values of assets acquired and liabilities assumed, including certain intangible assets that must be recognized. Typically, this allocation results in the purchase price exceeding the fair value of net assets acquired, which is recorded as goodwill. Core deposit intangibles are a measure of the value of checking, money market and savings deposits acquired in business combinations accounted for under the purchase method. Core deposit intangibles and other identified intangibles with finite useful lives are amortized using the sum of the year’s digits over their estimated useful lives of up to fifteen years. Customer related intangibles are amortized over their estimated useful lives of five to twelve years. Covenants not to compete are amortized over their three to five-year contractual lives. The Corporation completes a goodwill analysis at least on an annual basis or more often if events and circumstances indicate that there may be impairment. The Corporation also completes an impairment test for other intangible assets on an annual basis or more often if events and circumstances indicate a possible impairment. There can be no assurance that future impairment analyses will not result in a charge to earnings.
	Mortgage servicing rights are recognized as separate assets when mortgage loans are sold and the servicing rights are retained. Capitalized mortgage servicing rights are reported in other intangible assets on the consolidated balance sheets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing period of the underlying mortgage loans. Mortgage servicing rights are evaluated for impairment, on a quarterly basis, based upon the fair value of the servicing rights as compared to amortized cost. The Corporation estimates the fair value of mortgage servicing rights using discounted cash flow models that calculate the present value of estimated future net servicing income. The model uses readily available prepayment speed assumptions for the current interest rates of the portfolios serviced. Mortgage servicing rights are carried at the lower of amortized cost or estimated fair value. Impairment is recognized through a valuation allowance, to the extent that fair value is less than the unamortized capitalized amount.
Bank Owned Life Insurance	Bank Owned Life Insurance
	The Corporation carries bank owned life insurance at the net cash surrender value of the policies. Changes in the net cash surrender value of these policies are reflected in noninterest income. Proceeds from and purchases of bank owned life insurance are reflected in the consolidated statements of cash flows under investing activities. The Corporation recognizes a liability for the future death benefit for certain endorsement split-dollar life insurance arrangements that provide an employee with a death benefit in a postretirement/termination period.
Other Real Estate Owned	Other Real Estate Owned
	Other real estate owned represents properties acquired through customers’ loan defaults and is included in other assets. The real estate is stated at an amount equal to the loan balance prior to foreclosure, plus costs incurred for improvements to the property, but no more than the fair value of the property, less estimated costs to sell. Any write-down, at or prior to the dates the real estate is considered foreclosed, is charged to the allowance for loan losses. Subsequent write‑downs and any gain or loss upon the sale of real estate owned is recorded in other noninterest income. Expenses incurred in connection with holding such assets are recorded in other noninterest expense.
Derivative Financial Instruments	Derivative Financial Instruments
	The Corporation recognizes all derivative financial instruments on its balance sheet at fair value. Derivatives that are not hedges must be adjusted to fair value through income. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative are either offset against the change in fair value of the hedged assets, liabilities, or firm commitments through earnings, or recognized in other comprehensive income until the underlying forecasted transaction is recognized in earnings. The ineffective portion of a derivative's change in fair value is recognized in earnings immediately. To determine fair value, the Corporation uses third party pricing models that incorporate assumptions about market conditions and risks that are current at the reporting date.
	The Corporation may use interest-rate swap agreements to modify interest rate characteristics from variable to fixed or fixed to variable in order to reduce the impact of interest rate changes on future net interest income. The Corporation accounts for its interest-rate swap contracts in cash flow hedging relationships by establishing and documenting the effectiveness of the instrument in offsetting the change in cash flows of assets or liabilities that are being hedged. To determine effectiveness, the Corporation performs an analysis to identify if changes in fair value or cash flow of the derivative correlate to the equivalent changes in the forecasted interest receipts related to a specified hedged item. Recorded amounts related to interest-rate swaps are included in other assets or liabilities. The change in fair value of the ineffective part of the instrument would need to be charged to earnings, potentially causing material fluctuations in reported earnings in the period of the change relative to comparable periods. In a fair value hedge, the fair values of the interest rate swap agreements and changes in the fair values of the hedged items are recorded in the Corporation’s consolidated balance sheet with the corresponding gain or loss being recognized in the consolidated statement of income. The difference between changes in the fair values of interest rate swap agreements and the hedged items represents hedge ineffectiveness and is recorded in net interest income in the consolidated statement of income. The Corporation performs an assessment, both at the inception of the hedge and quarterly thereafter, to determine whether these derivatives are highly effective in offsetting changes in the value of the hedged items.
	In connection with its mortgage banking activities, the Corporation enters into commitments to originate certain fixed-rate residential mortgage loans for customers, also referred to as interest rate locks. In addition, the Corporation enters into forward commitments for the future sale or purchase of mortgage loans to or from third-party investors to hedge the effect of changes in interest rates on the value of the interest rate locks. Forward loan sale commitments may also be in the form of commitments to sell individual mortgage loans at a fixed price at a future date. Both the interest rate locks and the forward loan sale commitments are accounted for as derivatives and carried at fair value, determined as the amount that would be necessary to settle each derivative financial instrument at the balance sheet date. Gross derivative assets and liabilities are recorded within other assets and other liabilities on the consolidated balance sheets, with changes in fair value during the period recorded within the net gain on mortgage banking activities on the consolidated statements of income.
Federal Home Loan Bank Stock, Federal Reserve Bank Stock and Certain Other Investments without Readily Determinable Fair Values	Federal Home Loan Bank Stock, Federal Reserve Bank Stock and Certain Other Investments without Readily Determinable Fair Values
	Federal Home Loan Bank stock, Federal Reserve Bank stock and certain other investments without readily determinable fair values are classified as other assets on the consolidated balance sheets. These investments are carried at cost and evaluated for impairment periodically or if events or circumstances indicate that there may be impairment.
Income Taxes	Income Taxes
	There are two components of income tax expense: current and deferred. Current income tax expense approximates cash to be paid or refunded for taxes for the applicable period. Deferred income taxes are provided for temporary differences between amounts reported for financial statement and tax purposes. Deferred income taxes are computed using the asset and liability method, such that deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between financial reporting amounts and the tax basis of existing assets and liabilities based on currently enacted tax laws and tax rates in effect for the periods in which the differences are expected to reverse. Deferred tax assets are subject to management’s judgment based upon available evidence that future realizations are “more likely than not.” If management determines that the Corporation is not more likely than not, to realize some or all of the net deferred tax asset in the future, a charge to income tax expense may be required to reduce the value of the net deferred tax asset to the expected realizable value. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Penalties are recorded in noninterest expense in the year they are assessed and paid and are treated as a non-deductible expense for tax purposes. Interest is recorded in noninterest expense in the year it is assessed and paid and is treated as a deductible expense for tax purposes.
Retirement Plans and Other Postretirement Benefits	Retirement Plans and Other Postretirement Benefits
	Substantially all employees who were hired before December 8, 2009 are covered by a noncontributory retirement plan. Effective December 31, 2009, the benefits previously accrued under the noncontributory retirement plan were frozen and the plan was amended and converted to a cash balance plan, with participants not losing any pension benefits already earned in the plan. Prior to the cash balance plan conversion effective December 31, 2009, the plan provided benefits based on a formula of each participant’s final average pay. Future benefits under the cash balance plan accrue by crediting participants annually with an amount equal to a percentage of earnings in that year based on years of credited service as defined in the plan. Employees hired on or after December 8, 2009 are not eligible to participate in the noncontributory retirement plan. The Corporation also provides supplemental executive retirement benefits, a portion of which is in excess of limits imposed on qualified plans by federal tax law. These plans are non-qualified benefit plans. The Corporation provides certain postretirement healthcare and life insurance benefits for retired employees. The Corporation’s measurement date for plan assets and obligation is fiscal year-end. The Corporation recognizes on its consolidated balance sheet the funded status of its defined pension plans and changes in the funded status of the plan in the year in which the changes occur. An under-funded position would create a liability and an over-funded position would create an asset, with a correlating deferred tax asset or liability. The net impact would be an adjustment to equity as accumulated other comprehensive income (loss). The Corporation recognizes as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period.
	The Corporation sponsors a 401(k) deferred salary savings plan, which is a qualified defined contribution plan, and which covers all employees of the Corporation and its subsidiaries, and provides that the Corporation make matching contributions as defined by the plan.
	The Corporation sponsors a Supplemental Non-Qualified Pension Plan (SNQPP) which was established in 1981 for employees who have served for several years, with ability and distinction, in one of the primary policy-making senior level positions, with the understanding that the future growth and continued success of the Corporation’s business may well reflect the continued services to be rendered by these employees and the Corporation’s desire to be reasonably assured that these employees would continue to serve. The SNQPP was established prior to the existence of a 401(k) deferred salary savings, employee stock purchase and long-term incentive plans and therefore is not actively offered to new participants. These non-qualified plans are accounted for under guidance for deferred compensation arrangements.
Stock-Based Compensation	Stock-Based Compensation
	The fair value of share based awards is recognized as compensation expense over the vesting period based on the grant-date fair value of the awards. The Corporation uses the Black-Scholes Model to estimate the fair value of each option on the date of grant. The Black-Scholes Model estimates the fair value of employee stock options using a pricing model which takes into consideration the exercise price of the option, the expected life of the option, the current market price and its expected volatility, the expected dividends on the stock and the current risk-free interest rate for the expected life of the option. The Corporation grants stock options to employees with an exercise price equal to the fair value of the shares at the date of grant. The Corporation grants both fixed and variable (performance-based) restricted stock. The performance-based restricted stock awards vest based upon the Corporation’s performance against selected peers with respect to certain financial measures over a three-year period. The fair value of fixed restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period. The fair value of the performance-based restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period adjusted for a probability factor of achieving the performance goals.
Dividend Reinvestment and Employee Stock Purchase Plans	Dividend Reinvestment and Employee Stock Purchase Plans
	The Univest Dividend Reinvestment Plan allows for the issuance of 1,968,750 shares of common stock. During 2014 and 2013, 82,922 and 95,639 shares, respectively, were issued under the dividend reinvestment plan, with 552,181 shares available for future purchase at December 31, 2014.
	The 1996 Employee Stock Purchase Plan allows for the issuance of 984,375 shares of common stock. Employees may elect to make contributions to the plan in an aggregate amount not less than 2% or more than 10% of such employee’s total compensation. These contributions are then used to purchase stock during an offering period determined by the Corporation’s Employee Stock Purchase Plan Committee. The purchase price of the stock is 90% of the closing sale price on the last trading day of each quarter. Compensation expense is recognized as the discount is greater than 5% of the fair value. During 2014 and 2013, 23,271 and 20,195 shares, respectively, were issued under the employee stock purchase plan, with 732,624 shares available for future purchase at December 31, 2014.
Marketing and Advertising Costs	Marketing and Advertising Costs
	The Corporation’s accounting policy is to expense marketing and advertising costs as incurred, when the advertisement first takes place, or over the expected useful life of the related asset, as would be the case with billboards.
Statement of Cash Flows	Statement of Cash Flows
	The Corporation has defined those items included in the caption “Cash and due from banks” as cash and cash equivalents.
Trust Assets	Trust Assets
	Assets held by the Corporation in a fiduciary or agency capacity for its customers are not included in the consolidated financial statements since such items are not assets of the Corporation.
Earnings per Share	Earnings per Share
	Basic earnings per share represent income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if options on common shares had been exercised, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Corporation relate solely to outstanding stock options, and are determined using the treasury stock method. The effects of options to issue common stock are excluded from the computation of diluted earnings per share in periods in which the effect would be antidilutive.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU) regarding revenue from contracts with customers which clarifies the principles for recognizing revenue and develops a common standard for U.S. GAAP and International Financial Reporting Standards. The ASU establishes a core principle that would require an entity to identify the contract(s) with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract and recognize revenue when (or as) the entity satisfies a performance obligation. The ASU provides for improved disclosure requirements that require entities to disclose sufficient information that enables users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. This guidance is effective for fiscal years and interim periods within those years beginning after December 15, 2016, or January 1, 2017 for the Corporation. The Corporation is in the process of evaluating the impact of the adoption of this guidance on its financial statements; however, it is anticipated the impact will be only related to timing.
	In January 2014, the FASB issued an ASU regarding reclassification of residential real estate collateralized consumer mortgage loans upon foreclosure. The ASU clarifies that when an in-substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The ASU was issued to eliminate diversity in practice on this topic. The amendment is effective for fiscal years and interim periods within those years beginning after December 15, 2014, or January 1, 2015 for the Corporation. The Corporation does not anticipate the adoption of this guidance will have a material impact on its financial statements but will result in expanded disclosures effective March 31, 2015.

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Amortized cost and estimated fair value of held to maturity securities and available for sale securities by contractual maturity	The following table shows the amortized cost and the estimated fair value of the held-to-maturity securities and available-for-sale securities at December 31, 2014 and 2013, by contractual maturity within each type:
		At December 31, 2014											At December 31, 2013
	(Dollars in thousands)	Amortized		Gross			Gross			Fair Value			Amortized		Gross			Gross			Fair Value
		Cost		Unrealized			Unrealized						Cost		Unrealized			Unrealized
				Gains			Losses								Gains			Losses
	Securities Held-to-Maturity
	Corporate bonds:
	Within 1 year	$	13,088	$	82		$	—		$	13,170		$	11,148	$	122		$	—		$	11,270
	After 1 year to 5 years	41,259		388			(52		)	41,595			54,855		992			(264		)	55,583
		54,347		470			(52		)	54,765			66,003		1,114			(264		)	66,853
	Total	$	54,347	$	470		$	(52	)	$	54,765		$	66,003	$	1,114		$	(264	)	$	66,853
	Securities Available-for-Sale
	U.S. treasuries:
	After 1 year to 5 years	$	4,972	$	—		$	(127	)	$	4,845		$	—	$	—		$	—		$	—
	After 5 years to 10 years	—		—			—			—			4,966		—			(258		)	4,708
		4,972		—			(127		)	4,845			4,966		—			(258		)	4,708
	U.S. government corporations and agencies:
	Within 1 year	—		—			—			—			5,999		16			—			6,015
	After 1 year to 5 years	122,328		48			(532		)	121,844			112,989		114			(1,226		)	111,877
	After 5 years to 10 years	—		—			—			—			10,816		—			(560		)	10,256
		122,328		48			(532		)	121,844			129,804		130			(1,786		)	128,148
	State and political subdivisions:
	Within 1 year	600		2			—			602			1,564		13			—			1,577
	After 1 year to 5 years	12,326		17			(59		)	12,284			5,305		14			(29		)	5,290
	After 5 years to 10 years	49,554		1,616			(77		)	51,093			41,974		710			(698		)	41,986
	Over 10 years	37,004		1,792			(1		)	38,795			57,899		1,227			(322		)	58,804
		99,484		3,427			(137		)	102,774			106,742		1,964			(1,049		)	107,657
	Residential mortgage-backed securities:
	After 1 year to 5 years	5,066		17			—			5,083			—		—			—			—
	After 5 years to 10 years	4,856		—			(32		)	4,824			10,008		5			(53		)	9,960
	Over 10 years	3,661		75			—			3,736			25,721		20			(221		)	25,520
		13,583		92			(32		)	13,643			35,729		25			(274		)	35,480
	Collateralized mortgage obligations:
	After 1 year to 5 years	—		—			—			—			73		—			—			73
	Over 10 years	3,810		—			(85		)	3,725			7,341		40			(253		)	7,128
		3,810		—			(85		)	3,725			7,414		40			(253		)	7,201
	Corporate bonds:
	Within 1 year	4,998		22			—			5,020			—		—			—			—
	After 1 year to 5 years	29,505		88			(244		)	29,349			18,838		52			(411		)	18,479
	After 5 years to 10 years	20,442		—			(371		)	20,071			16,474		4			(1,117		)	15,361
		54,945		110			(615		)	54,440			35,312		56			(1,528		)	33,840
	Money market mutual funds:
	No stated maturity	11,675		—			—			11,675			16,900		—			—			16,900
		11,675		—			—			11,675			16,900		—			—			16,900
	Equity securities:
	No stated maturity	854		483			—			1,337			1,679		668			—			2,347
		854		483			—			1,337			1,679		668			—			2,347
	Total	$	311,651	$	4,160		$	(1,528	)	$	314,283		$	338,546	$	2,883		$	(5,148	)	$	336,281
Information Related to Sales of Securities Available-for-Sale	The following table presents information related to sales of securities available-for-sale during the years ended December 31, 2014, 2013 and 2012:
		For the Years Ended December 31,
	(Dollars in thousands)	2014		2013			2012
	Securities available-for-sale:
	Proceeds from sales	$	32,967	$	76,361		$	57,186
	Gross realized gains on sales	635		3,396			1,201
	Gross realized losses on sales	—		7			896
	Tax expense related to net realized gains on sales	222		1,186			107
Schedule of Securities in Unrealized Loss Position	The following table shows the fair value of securities that were in an unrealized loss position at December 31, 2014 and 2013 by the length of time those securities were in a continuous loss position:
		Less than					Twelve Months						Total
		Twelve Months					or Longer
	(Dollars in thousands)	Fair Value		Unrealized			Fair Value			Unrealized			Fair Value		Unrealized
				Losses						Losses					Losses
	At December 31, 2014
	Securities Held-to-Maturity
	Corporate bonds	$	15,036	$	(27	)	$	4,987		$	(25	)	$	20,023	$	(52	)
	Total	$	15,036	$	(27	)	$	4,987		$	(25	)	$	20,023	$	(52	)
	Securities Available-for-Sale
	U.S. treasuries	$	—	$	—		$	4,845		$	(127	)	$	4,845	$	(127	)
	U.S. government corporations and agencies	39,607		(80		)	62,140			(452		)	101,747		(532		)
	State and political subdivisions	10,246		(31		)	9,303			(106		)	19,549		(137		)
	Residential mortgage-backed securities	4,824		(32		)	—			—			4,824		(32		)
	Collateralized mortgage obligations	—		—			3,725			(85		)	3,725		(85		)
	Corporate bonds	21,949		(328		)	15,805			(287		)	37,754		(615		)
	Total	$	76,626	$	(471	)	$	95,818		$	(1,057	)	$	172,444	$	(1,528	)
	At December 31, 2013
	Securities Held-to-Maturity
	Corporate bonds	$	19,942	$	(264	)	$	—		$	—		$	19,942	$	(264	)
	Total	$	19,942	$	(264	)	$	—		$	—		$	19,942	$	(264	)
	Securities Available-for-Sale
	U.S. treasuries	$	4,708	$	(258	)	$	—		$	—		$	4,708	$	(258	)
	U.S. government corporations and agencies	101,813		(1,786		)	—			—			101,813		(1,786		)
	State and political subdivisions	30,233		(1,049		)	—			—			30,233		(1,049		)
	Residential mortgage-backed securities	29,444		(274		)	—			—			29,444		(274		)
	Collateralized mortgage obligations	4,091		(253		)	—			—			4,091		(253		)
	Corporate bonds	26,557		(1,528		)	—			—			26,557		(1,528		)
	Total	$	196,846	$	(5,148	)	$	—		$	—		$	196,846	$	(5,148	)

Loans_and_Leases_Tables

Loans and Leases (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Summary of Major Loan and Lease Categories
		At December 31,
	(Dollars in thousands)	2014				2013
	Commercial, financial and agricultural	$	457,827			$	422,816
	Real estate-commercial	628,478				600,353
	Real estate-construction	79,887				90,493
	Real estate-residential secured for business purpose	36,932				37,319
	Real estate-residential secured for personal purpose	166,850				149,164
	Real estate-home equity secured for personal purpose	108,250				95,345
	Loans to individuals	29,941				40,000
	Lease financings	118,460				105,994
	Total loans and leases held for investment, net of deferred income	$	1,626,625			$	1,541,484
	Unearned lease income, included in the above table	$	(14,131	)		$	(14,439	)
	Net deferred costs, included in the above table	3,218				2,744
	Overdraft deposits included in the above table	50				62
Schedule of Future Minimum Lease Payments for Capital Leases
	At December 31, 2014 and 2013, the schedule of minimum lease payments receivable is as follows:
		At December 31,
	(Dollars in thousands)	2014				2013
	Within 1 year	$	50,340			$	43,911
	After 1 year through 2 years	38,084				33,302
	After 2 years through 3 years	25,888				23,723
	After 3 years through 4 years	13,667				14,335
	After 4 years through 5 years	4,312				4,983
	Thereafter	300				179
	Total future minimum lease payments receivable	132,591				120,433
	Less: Unearned income	(14,131		)		(14,439		)
	Total lease financing receivables, net of unearned income	$	118,460			$	105,994
Age Analysis of Past Due Loans and Leases	The following presents, by class of loans and leases, an aging of past due loans and leases, loans and leases which are current and the recorded investment in loans and leases 90 days or more past due which are accruing interest at December 31, 2014 and 2013:
	(Dollars in thousands)	30-59				60-89				90 Days				Total				Current				Total Loans				Recorded
		Days				Days				or more				Past Due								and Leases				Investment 90
		Past Due				Past Due				Past Due												Held for				Days or more
																						Investment				Past Due and
																										Accruing
																										Interest
	At December 31, 2014
	Commercial, financial and agricultural	$	145			$	747			$	2,567			$	3,459			$	454,368			$	457,827			$	—
	Real estate—commercial real estate and construction:
	Commercial real estate	361				913				1,163				2,437				626,041				628,478				—
	Construction	—				405				5,525				5,930				73,957				79,887				—
	Real estate—residential and home equity:
	Residential secured for business purpose	167				56				713				936				35,996				36,932				—
	Residential secured for personal purpose	409				604				60				1,073				165,777				166,850				—
	Home equity secured for personal purpose	348				—				215				563				107,687				108,250				31
	Loans to individuals	365				65				365				795				29,146				29,941				365
	Lease financings	1,610				406				435				2,451				116,009				118,460				55
	Total	$	3,405			$	3,196			$	11,043			$	17,644			$	1,608,981			$	1,626,625			$	451
	At December 31, 2013
	Commercial, financial and agricultural	$	386			$	922			$	2,904			$	4,212			$	418,604			$	422,816			$	12
	Real estate—commercial real estate and construction:
	Commercial real estate	148				262				4,932				5,342				595,011				600,353				—
	Construction	—				—				8,742				8,742				81,751				90,493				—
	Real estate—residential and home equity:
	Residential secured for business purpose	87				276				161				524				36,795				37,319				—
	Residential secured for personal purpose	1,370				—				617				1,987				147,177				149,164				—
	Home equity secured for personal purpose	278				97				100				475				94,870				95,345				23
	Loans to individuals	445				193				319				957				39,043				40,000				319
	Lease financings	2,182				455				389				3,026				102,968				105,994				59
	Total	$	4,896			$	2,205			$	18,164			$	25,265			$	1,516,219			$	1,541,484			$	413
Non-Performing Loans and Leases	The following presents, by class of loans and leases, non-performing loans and leases at December 31, 2014 and 2013:
		At December 31,
		2014																2013
	(Dollars in thousands)	Nonaccrual				Accruing				Loans and				Total Non-				Nonaccrual				Accruing				Loans and				Total Non-
		Loans and				Troubled				Leases				Performing				Loans and				Troubled				Leases				Performing
		Leases*				Debt				90 Days				Loans and				Leases*				Debt				90 Days				Loans and
						Restructured				or more				Leases								Restructured				or more				Leases
						Loans and				Past Due												Loans and				Past Due
						Lease				and												Lease				and
						Modifications				Accruing												Modifications				Accruing
										Interest																Interest
	Commercial, financial and agricultural	$	5,002			$	2,851			$	—			$	7,853			$	4,253			$	1,329			$	12			$	5,594
	Real estate—commercial real estate and construction:
	Commercial real estate	4,413				2,618				—				7,031				8,091				4,271				—				12,362
	Construction	5,931				—				—				5,931				9,159				2,307				—				11,466
	Real estate—residential and home equity:
	Residential secured for business purpose	915				—				—				915				224				—				—				224
	Residential secured for personal purpose	512				—				—				512				1,101				—				—				1,101
	Home equity secured for personal purpose	184				—				31				215				77				—				23				100
	Loans to individuals	—				—				365				365				—				36				319				355
	Lease financings	380				—				55				435				330				—				59				389
	Total	$	17,337			$	5,469			$	451			$	23,257			$	23,235			$	7,943			$	413			$	31,591
	* Includes nonaccrual troubled debt restructured loans and lease modifications of $3.1 million and $1.6 million at December 31, 2014 and December 31, 2013, respectively.
Credit Quality Indicators
	(Dollars in thousands)	Real Estate—				Real Estate—				Loans to				Lease				Total
		Residential				Home Equity				Individuals				Financing
		Secured for				Secured for
		Personal Purpose				Personal Purpose
	At December 31, 2014
	Performing	$	166,338			$	108,035			$	29,576			$	118,025			$	421,974
	Nonperforming	512				215				365				435				1,527
	Total	$	166,850			$	108,250			$	29,941			$	118,460			$	423,501
	At December 31, 2013
	Performing	$	148,063			$	95,245			$	39,645			$	105,605			$	388,558
	Nonperforming	1,101				100				355				389				1,945
	Total	$	149,164			$	95,345			$	40,000			$	105,994			$	390,503
	The following tables present by class, the recorded investment in loans and leases held for investment by credit quality indicator at December 31, 2014 and 2013.
	The Corporation employs a ten (10) grade risk rating system related to the credit quality of commercial loans and residential real estate loans secured for a business purpose of which the first six categories are pass categories (credits not adversely rated). The following is a description of the internal risk ratings and the likelihood of loss related to each risk rating. Loans with risk ratings of one through five are reviewed based on the relationship dollar amount with the borrower: loans with a relationship total of $2.5 million or greater are reviewed quarterly; loans with a relationship balance of less than $2.5 million but greater than $500 thousand are reviewed annually based on the borrower’s fiscal year; loans with a relationship balance of less than $500 thousand are reviewed only if the loan becomes 60 days or more past due. Loans with risk ratings of six are also reviewed based on the relationship dollar amount with the borrower: loans with a relationship balance of $2.0 million or greater are reviewed quarterly; loans with a relationship balance of less than $2.0 million but greater than $500 thousand are reviewed annually; loans with a relationship balance of less than $500 thousand are reviewed only if the loan becomes 60 days or more past due. Loans with risk ratings of seven are reviewed at least quarterly, and as often as monthly, at management’s discretion. Loans with risk ratings of eight through ten are reviewed monthly.
	1	Cash Secured—No credit risk
	2	Fully Secured—Negligible credit risk
	3	Strong—Minimal credit risk
	4	Satisfactory—Nominal credit risk
	5	Acceptable—Moderate credit risk
	6	Pre-Watch—Marginal, but stable credit risk
	7	Special Mention—Potential weakness
	8	Substandard—Well-defined weakness
	9	Doubtful—Collection in-full improbable
	10	Loss—Considered uncollectible
	Commercial Credit Exposure Credit Risk by Internally Assigned Grades
	(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Total
		Financial and				Commercial				Construction				Residential Secured
		Agricultural												for Business Purpose
	At December 31, 2014
	Grade:
	1. Cash secured/ 2. Fully secured	$	4,248			$	—			$	1,262			$	—			$	5,510
	3. Strong	14,013				8,504				3,897				—				26,414
	4. Satisfactory	23,931				30,587				8,731				339				63,588
	5. Acceptable	301,425				402,719				55,111				24,535				783,790
	6. Pre-watch	65,993				123,129				4,956				5,384				199,462
	7. Special Mention	7,166				17,505				—				1,304				25,975
	8. Substandard	41,051				46,034				5,930				5,370				98,385
	9. Doubtful	—				—				—				—				—
	10.Loss	—				—				—				—				—
	Total	$	457,827			$	628,478			$	79,887			$	36,932			$	1,203,124
	At December 31, 2013
	Grade:
	1. Cash secured/ 2. Fully secured	4,763				2,014				1,682				—				8,459
	3. Strong	6,051				8,515				4,300				—				18,866
	4. Satisfactory	34,650				17,758				1,500				261				54,169
	5. Acceptable	251,203				384,061				54,464				26,694				716,422
	6. Pre-watch	84,201				113,181				16,084				5,884				219,350
	7. Special Mention	10,095				19,445				—				1,841				31,381
	8. Substandard	31,508				55,331				12,463				2,639				101,941
	9. Doubtful	345				48				—				—				393
	10.Loss	—				—				—				—				—
	Total	$	422,816			$	600,353			$	90,493			$	37,319			$	1,150,981
Reserve for Loan and Lease Losses and Recorded Investment in Loans and Leases	The following presents, by portfolio segment, a summary of the activity in the reserve for loan and lease losses for the years ended December 31, 2014, 2013 and 2012:
	(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Loans to				Lease				Unallocated				Total
		Financial				Commercial				Residential				Residential				Individuals				Financings
		and				and				Secured for				and Home
		Agricultural				Construction				Business				Equity
										Purpose				Secured for
														Personal
														Purpose
	For the Year Ended December 31, 2014
	Reserve for loan and lease losses:
	Beginning balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
	Charge-offs	(2,834		)		(4,363		)		(140		)		(141		)		(796		)		(576		)		N/A				(8,850		)
	Recoveries	247				524				60				34				265				281				N/A				1,411
	Provision (recovery of provision)	(282		)		4,002				(219		)		(53		)		197				(5		)		(33		)		3,607
	Ending balance	$	6,920			$	8,943			$	763			$	1,124			$	360			$	985			$	1,567			$	20,662
	For the Year Ended December 31, 2013
	Reserve for loan and lease losses:
	Beginning balance	$	11,594			$	7,507			$	639			$	980			$	679			$	1,326			$	2,021			$	24,746
	Charge-offs	(3,213		)		(8,667		)		(112		)		(195		)		(641		)		(791		)		N/A				(13,619		)
	Recoveries	320				1,104				13				13				174				515				N/A				2,139
	Provision (recovery of provision)	1,088				8,836				522				486				482				235				(421		)		11,228
	Ending balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
	For the Year Ended December 31, 2012
	Reserve for loan and lease losses:
	Beginning balance	$	11,262			$	13,317			$	823			$	735			$	730			$	1,344			$	1,659			$	29,870
	Charge-offs *	(9,974		)		(4,803		)		—				(156		)		(578		)		(1,224		)		N/A				(16,735		)
	Recoveries	484				334				60				7				130				561				N/A				1,576
	Provision (recovery of provision)	9,822				(1,341		)		(244		)		394				397				645				362				10,035
	Ending balance	$	11,594			$	7,507			$	639			$	980			$	679			$	1,326			$	2,021			$	24,746
	* Includes charge-offs of $1.3 million on commercial real estate loans which were subsequently transferred to loans held for sale in 2012 and sold during 2012.
	N/A – Not applicable
	The following presents, by portfolio segment, the balance in the reserve for loan and lease losses disaggregated on the basis of impairment method and the recorded investment in loans and leases disaggregated on the basis of impairment method at December 31, 2014 and 2013:
	(Dollars in thousands)	Commercial,				Real Estate—				Real Estate—				Real Estate—				Loans to				Lease				Unallocated				Total
		Financial				Commercial				Residential				Residential				Individuals				Financings
		and				and				Secured for				and Home
		Agricultural				Construction				Business				Equity
										Purpose				Secured for
														Personal
														Purpose
	At December 31, 2014
	Reserve for loan and lease losses:
	Ending balance: individually evaluated for impairment	$	920			$	78			$	—			$	—			$	—			$	—			N/A				$	998
	Ending balance: collectively evaluated for impairment	6,000				8,865				763				1,124				360				985				1,567				19,664
	Total ending balance	$	6,920			$	8,943			$	763			$	1,124			$	360			$	985			$	1,567			$	20,662
	Loans and leases held for investment:
	Ending balance: individually evaluated for impairment	$	16,561			$	35,926			$	3,008			$	696			$	—			$	—							$	56,191
	Ending balance: collectively evaluated for impairment	441,266				672,439				33,924				274,404				29,941				118,460								1,570,434
	Total ending balance	$	457,827			$	708,365			$	36,932			$	275,100			$	29,941			$	118,460							$	1,626,625
	At December 31, 2013
	Reserve for loan and lease losses:
	Ending balance: individually evaluated for impairment	$	2,398			$	—			$	501			$	64			$	—			$	—			N/A				$	2,963
	Ending balance: collectively evaluated for impairment	7,391				8,780				561				1,220				694				1,285				1,600				21,531
	Total ending balance	$	9,789			$	8,780			$	1,062			$	1,284			$	694			$	1,285			$	1,600			$	24,494
	Loans and leases held for investment:
	Ending balance: individually evaluated for impairment	$	14,105			$	41,240			$	1,774			$	1,178			$	36			$	—							$	58,333
	Ending balance: collectively evaluated for impairment	408,711				649,606				35,545				243,331				39,964				105,994								1,483,151
	Total ending balance	$	422,816			$	690,846			$	37,319			$	244,509			$	40,000			$	105,994							$	1,541,484
	N/A – Not applicable
Impaired Loans	The following presents, by class of loans, the recorded investment and unpaid principal balance of impaired loans, the amounts of the impaired loans for which there is not an allowance for credit losses and the amounts for which there is an allowance for credit losses at December 31, 2014 and 2013:
		At December 31,
		2014												2013
	(Dollars in thousands)	Recorded				Unpaid				Related				Recorded				Unpaid				Related
		Investment				Principal				Allowance				Investment				Principal				Allowance
						Balance												Balance
	Impaired loans with no related allowance recorded:
	Commercial, financial and agricultural	$	12,628			$	13,050							$	10,890			$	11,749
	Real estate—commercial real estate	29,779				30,810								28,883				35,700
	Real estate—construction	5,931				6,474								12,357				14,540
	Real estate—residential secured for business purpose	3,008				3,044								224				235
	Real estate—residential secured for personal purpose	512				547								131				131
	Real estate—home equity secured for personal purpose	184				184								77				77
	Loans to individuals	—				—								36				54
	Total impaired loans with no related allowance recorded	$	52,042			$	54,109							$	52,598			$	62,486
	Impaired loans with an allowance recorded:
	Commercial, financial and agricultural	$	3,933			$	3,935			$	920			$	3,215			$	3,272			$	2,398
	Real estate—commercial real estate	216				216				78				—				—				—
	Real estate—residential secured for business purpose	—				—				—				1,550				1,550				501
	Real estate—residential secured for personal purpose	—				—				—				970				976				64
	Total impaired loans with an allowance recorded	$	4,149			$	4,151			$	998			$	5,735			$	5,798			$	2,963
	Total impaired loans:
	Commercial, financial and agricultural	$	16,561			$	16,985			$	920			$	14,105			$	15,021			$	2,398
	Real estate—commercial real estate	29,995				31,026				78				28,883				35,700				—
	Real estate—construction	5,931				6,474				—				12,357				14,540				—
	Real estate—residential secured for business purpose	3,008				3,044				—				1,774				1,785				501
	Real estate—residential secured for personal purpose	512				547				—				1,101				1,107				64
	Real estate—home equity secured for personal purpose	184				184				—				77				77				—
	Loans to individuals	—				—				—				36				54				—
	Total impaired loans	$	56,191			$	58,260			$	998			$	58,333			$	68,284			$	2,963
Average Recorded Investment in Impaired Loans and Leases and Analysis of Interest on Impaired Loans	The following presents by class of loans, the average recorded investment in impaired loans and an analysis of interest on impaired loans. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. Therefore, interest income on accruing impaired loans is recognized using the accrual method.
		For the Years Ended December 31,
		2014												2013												2012
	(Dollars in thousands)	Average				Interest				Additional				Average				Interest				Additional				Average				Interest				Additional
		Recorded				Income				Interest Income				Recorded				Income				Interest Income				Recorded				Income				Interest Income
		Investment				Recognized*				That Would				Investment				Recognized*				That Would				Investment				Recognized*				That Would
										Have Been												Have Been												Have Been
										Recognized												Recognized												Recognized
										Under Original												Under Original												Under Original
										Terms												Terms												Terms
	Commercial, financial and agricultural	$	15,334			$	540			$	258			$	6,412			$	172			$	200			$	5,189			$	82			$	288
	Real estate—commercial real estate	26,662				1,143				323				25,728				837				717				20,756				348				1,086
	Real estate—construction	10,412				103				463				14,621				124				680				16,207				117				763
	Real estate—residential secured for business purpose	2,524				77				61				672				19				10				156				—				7
	Real estate—residential secured for personal purpose	719				—				49				760				—				45				293				—				17
	Real estate—home equity secured for personal purpose	106				—				10				8				—				—				2				—				—
	Loans to individuals	4				—				—				40				4				—				47				5				—
	Total	$	55,761			$	1,863			$	1,164			$	48,241			$	1,156			$	1,652			$	43,242			$	552			$	2,161
	*	Includes interest income recognized on a cash basis for nonaccrual loans of $23 thousand, $6 thousand and $67 thousand for the years ended December 31, 2014, 2013 and 2012, respectively and interest income recognized on the accrual method for accruing impaired loans of $1.8 million, $1.2 million and $485 thousand for the years ended December 31, 2014, 2013 and 2012, respectively.
Troubled Debt Restructured Loans	The following presents, by class of loans, information regarding accruing and nonaccrual loans that were restructured during the years ended December 31, 2014 and 2013:
		For the Years Ended December 31,
		2014															2013
	(Dollars in thousands)	Number			Pre-				Post-				Related				Number			Pre-				Post-				Related
		of			Restructuring				Restructuring				Allowance				of			Restructuring				Restructuring				Allowance
		Loans			Outstanding				Outstanding								Loans			Outstanding				Outstanding
					Recorded				Recorded											Recorded				Recorded
					Investment				Investment											Investment				Investment
	Accruing Troubled Debt Restructured Loans:
	Commercial, financial and agricultural	6			$	1,824			$	1,824			$	507			2			$	1,025			$	1,025			$	—
	Real estate—commercial real estate	1			1,000				1,000				—				3			1,569				1,569				—
	Real estate—construction	—			—				—				—				1			459				459				—
	Total	7			$	2,824			$	2,824			$	507			6			$	3,053			$	3,053			$	—
	Nonaccrual Troubled Debt Restructured Loans:
	Real estate—commercial real estate	1			$	50			$	50			$	—			—			$	—			$	—			$	—
	Real estate—residential secured for business purpose	2			688				688				—				—			—				—				—
	Total	3			$	738			$	738			$	—			—			$	—			$	—			$	—
Concessions Granted on Accruing and Nonaccrual Loans Restructured	The following presents, by class of loans, information regarding the types of concessions granted on accruing and nonaccrual loans that were restructured during the years ended December 31, 2014 and 2013:
		Interest Only Term							Temporary Payment							Interest Rate							Maturity Date							Payments Suspended						Total Concessions
		Extension							Reduction							Reduction							Extension													Granted
	(Dollars in thousands)	No. of			Amount				No. of			Amount				No. of			Amount				No. of			Amount				No. of			Amount			No. of	Amount
		Loans							Loans							Loans							Loans							Loans						Loans
	For the Year Ended December 31, 2014
	Accruing Troubled Debt Restructured Loans:
	Commercial, financial and agricultural	—			$	—			—			$	—			—			$	—			5			$	1,699			1			$	125		6	$	1,824
	Real estate—commercial real estate	—			—				—			—				—			—				1			1,000				—			—			1	1,000
	Total	—			$	—			—			$	—			—			$	—			6			$	2,699			1			$	125		7	$	2,824
	Nonaccrual Troubled Debt Restructured Loans:
	Real estate—commercial real estate	—			$	—			—			$	—			1			$	50			—			$	—			—			$	—		1	$	50
	Real estate—residential secured for business purpose	—			—				—			—				1			55				1			633				—			—			2	688
	Total	—			$	—			—			$	—			2			$	105			1			$	633			—			$	—		3	$	738
	For the Year Ended December 31, 2013
	Accruing Troubled Debt Restructured Loans:
	Commercial, financial and agricultural	1			$	1,000			—			$	—			—			$	—			1			$	25			—			$	—		2	$	1,025
	Real estate—commercial real estate	—			—				1			756				—			—				2			813				—			—			3	1,569
	Real estate—construction	—			—				—			—				—			—				1			459				—			—			1	459
	Total	1			$	1,000			1			$	756			—			$	—			4			$	1,297			—			$	—		6	$	3,053
	Nonaccrual Troubled Debt Restructured Loans:
	Total	—			$	—			—			$	—			—			$	—			—			$	—			—			$	—		—	$	—
Accruing and Nonaccrual Troubled Debt Restructured Loans with Payment Defaults	The following presents, by class of loans, information regarding accruing and nonaccrual troubled debt restructured loans, for which there were payment defaults within twelve months of the restructuring date:
		For the Years Ended December 31,
		2014							2013
	(Dollars in thousands)	Number			Recorded				Number			Recorded
		of Loans			Investment				of Loans			Investment
	Accruing Troubled Debt Restructured Loans:
	Commercial, financial and agricultural	—			$	—			1			$	1,000
	Total	—			$	—			1			$	1,000
	Nonaccrual Troubled Debt Restructured Loans:
	Total	—			$	—			—			$	—

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Components of Premises and Equipment	The following table reflects the components of premises and equipment:
		At December 31,
	(Dollars in thousands)	2014			2013
	Land and land improvements	$	10,576		$	9,987
	Premises and improvements	37,348			35,225
	Furniture and equipment	24,303			22,295
	Total cost	72,227			67,507
	Less: accumulated depreciation	(35,218		)	(33,378		)
	Net book value	$	37,009		$	34,129

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes in Carrying Amount of Goodwill	Changes in the carrying amount of the Corporation's goodwill by business segment for the years ended December 31, 2014 and 2013 were as follows:
	(Dollars in thousands)	Banking			Wealth Management			Insurance			Consolidated
	Balance at December 31, 2012	$	35,058		$	8,625		$	12,555		$	56,238
	Addition to goodwill from acquisitions	—			—			1,279			1,279
	Balance at December 31, 2013	35,058			8,625			13,834			57,517
	Addition to goodwill from acquisitions	—			6,809			3,391			10,200
	Balance at December 31, 2014	$	35,058		$	15,434		$	17,225		$	67,717
Components of Intangible Assets	The following table reflects the components of intangible assets at the dates indicated:
		At December 31, 2014									At December 31, 2013
	(Dollars in thousands)	Gross Carrying Amount			Accumulated Amortization and Fair Value Adjustments			Net Carrying Amount			Gross Carrying Amount		Accumulated Amortization and Fair Value Adjustments		Net Carrying Amount
	Amortized intangible assets:
	Customer related intangibles	$	13,397		$	6,726		$	6,671		$	7,513	$	4,854	$	2,659
	Mortgage servicing rights	10,559			5,050			5,509			10,965		5,446		5,519
	Total amortized intangible assets	$	23,956		$	11,776		$	12,180		$	18,478	$	10,300	$	8,178
Estimated Aggregate Amortization Expense	The estimated aggregate amortization expense for customer related intangibles for each of the five succeeding fiscal years follows:
	Year	(Dollars in thousands)	Amount
	2015		$	1,730
	2016		1,411
	2017		1,162
	2018		868
	2019		622
	Thereafter		878
	The estimated amortization expense of mortgage servicing rights for each of the five succeeding fiscal years is as follows:
	Year	(Dollars in thousands)	Amount
	2015		$	923
	2016		787
	2017		662
	2018		556
	2019		466
	Thereafter		2,115
Changes in Mortgage Servicing Rights	Changes in the mortgage servicing rights balance are summarized as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Beginning of period	$	5,519		$	4,152		$	2,739
	Servicing rights capitalized	1,118			2,485			2,727
	Amortization of servicing rights	(1,378		)	(1,365		)	(1,610		)
	Changes in valuation allowance	250			247			296
	End of period	$	5,509		$	5,519		$	4,152
	Mortgage loans serviced for others	$	796,835		$	751,891		$	604,801
Activity in Valuation Allowance for Mortgage Servicing Rights	Activity in the valuation allowance for mortgage servicing rights was as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Valuation allowance, beginning of period	$	(250	)	$	(497	)	$	(793	)
	Additions	—			—			—
	Reductions	250			247			296
	Direct write-downs	—			—			—
	Valuation allowance, end of period	$	—		$	(250	)	$	(497	)

Accrued_Interest_Receivable_an1

Accrued Interest Receivable and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Details of Accrued Interest Receivable and Other Assets	The following table provides the details of accrued interest receivable and other assets:
		At December 31,
	(Dollars in thousands)	2014		2013
	Other real estate owned	$	955	$	1,650
	Accrued interest receivable	6,086		6,262
	Accrued income and other receivables	2,655		3,539
	Fair market value of derivative financial instruments	788		346
	Other prepaid expenses	13,963		9,624
	Federal Reserve Bank stock, Federal Home Loan Bank stock and other not readily marketable equity securities	4,487		6,632
	Net federal deferred tax assets	10,756		12,335
	Total accrued interest and other assets	$	39,690	$	40,388

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Provision for Federal and State Income Taxes	The provision for federal and state income taxes included in the accompanying consolidated statements of income consists of the following:
		For the Years Ended December 31,
	(Dollars in thousands)	2014				2013				2012
	Current:
	Federal	$	2,509			$	4,172			$	2,753
	State	777				591				258
	Deferred:
	Federal	4,027				922				2,397
	State	135				11				143
		$	7,448			$	5,696			$	5,551
Income Tax Provision Differences from Expected Statutory Provision	The provision for income taxes differs from the expected statutory provision as follows:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Expected provision at statutory rate	35	%		35	%		35	%
	Difference resulting from:
	Tax exempt interest income	(11.2	)		(11.7	)		(12.1	)
	Increase in value of bank owned life insurance assets	(1.9	)		(3.9	)		(3.5	)
	Other, including state income taxes, valuation allowances and rate differentials	3.2			1.8			1.6
		25.1	%		21.2	%		21	%
Components of Deferred Tax Assets and Liabilities	The assets and liabilities giving rise to the Corporation’s deferred tax assets and liabilities are as follows:
		At December 31,
	(Dollars in thousands)	2014				2013
	Deferred tax assets:
	Loan and lease loss	$	7,358			$	8,785
	Deferred compensation	2,492				2,675
	Actuarial adjustments on retirement benefits*	8,625				4,568
	Interest on nonaccrual loans	—				2,268
	State net operating losses	1,621				1,743
	Other-than-temporary impairments on equity securities	577				759
	Alternative minimum tax credits**	1,067				1,367
	Net unrealized holding losses on securities available-for-sale*	—				792
	Other	1,125				280
	Gross deferred tax assets	22,865				23,237
	Valuation allowance	(1,461		)		(1,630		)
	Total deferred tax assets, net of valuation allowance	21,404				21,607
	Deferred tax liabilities:
	Market discount	2,224				1,722
	Retirement plans	5,700				5,602
	Intangible assets	2,308				2,212
	Net unrealized holding gains on securities available-for-sale and swaps*	837				—
	Total deferred tax liabilities	11,069				9,536
	Net deferred tax assets	$	10,335			$	12,071
	*Represents the amount of deferred taxes recorded in accumulated other comprehensive loss.
	** The alternative minimum tax credits have an indefinite life.

Retirement_Plans_and_Other_Pos1

Retirement Plans and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Summary of Retirement Plans and Other Postretirement Benefits	Information with respect to the Retirement Plans and Other Postretirement Benefits follows:
		Retirement Plans								Other Postretirement Benefits
	(Dollars in thousands)	2014				2013				2014			2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	39,593			$	42,879			$	2,330		$	2,518
	Service cost	528				621				75			86
	Interest cost	1,900				1,712				128			118
	Actuarial loss (gain)	11,462				(3,818		)		455			(313		)
	Benefits paid	(2,093		)		(1,801		)		(92		)	(79		)
	Benefit obligation at end of year	$	51,390			$	39,593			$	2,896		$	2,330
	Change in plan assets:
	Fair value of plan assets at beginning of year	$	40,547			$	34,420			$	—		$	—
	Actual return on plan assets	2,821				5,764				—			—
	Benefits paid	(2,093		)		(1,801		)		(92		)	(79		)
	Employer contribution and non-qualified benefit payments	162				2,164				92			79
	Fair value of plan assets at end of year	$	41,437			$	40,547			$	—		$	—
	Funded status	(9,953		)		954				(2,896		)	(2,330		)
	Unrecognized net actuarial loss	25,010				14,138				950			510
	Unrecognized prior service costs	(1,309		)		(1,590		)		—			(7		)
	Net amount recognized	$	13,748			$	13,502			$	(1,946	)	$	(1,827	)
Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets	Information for the pension plans with an accumulated benefit obligation in excess of the fair value of plan assets is shown below. The accumulated benefit obligation did not exceed the fair value of plan assets at December 31, 2013 but is shown for comparative purposes.
		At December 31,
	(Dollars in thousands)	2014				2013
	Projected benefit obligation	$	48,928			$	37,912
	Accumulated benefit obligation	45,003				36,683
	Fair value of plan assets	41,437				40,547
Components of Net Periodic Benefit Cost (Income)	Components of net periodic benefit cost (income) were as follows:
		Retirement Plans											Other Post Retirement
													Benefits
	(Dollars in thousands)	2014				2013				2012			2014			2013			2012
	Service cost	$	528			$	621			$	622		$	75		$	86		$	82
	Interest cost	1,900				1,712				1,726			128			118			116
	Expected return on plan assets	(2,929		)		(2,527		)		(2,254		)	—			—			—
	Amortization of net actuarial loss	649				1,259				1,147			17			23			23
	Accretion of prior service cost	(281		)		(235		)		(235		)	(7		)	(20		)	(20		)
	Net periodic benefit (income) cost	$	(133	)		$	830			$	1,006		$	213		$	207		$	201
Expected Amortization Expense
	(Dollars in thousands)	Retirement Plans				Other Postretirement Benefits
	Expected amortization expense for 2015:
	Amortization of net actuarial loss	$	1,308			$	54
	Accretion of prior service cost	(280		)		—
Summary of Benefit Payments Expected to be Paid	The following benefits payments, which reflect expected future service, as appropriate, are expected to be paid:
	(Dollars in thousands)		Retirement Plans				Other Postretirement Benefits
	For the fiscal year ending:
	2015		$	2,390			$	113
	2016		2,429				116
	2017		2,463				121
	2018		2,514				126
	2019		2,572				130
	Years 2020-2024		13,533				700
Weighted-Average Assumptions Used to Determine Benefit Obligations	Weighted-average assumptions used to determine benefit obligations at December 31, 2014 and 2013 were as follows:
		Retirement Plans						Other Postretirement Benefits
		2014			2013			2014			2013
	Assumed discount rate	3.9	%		4.9	%		3.9	%		4.9	%
	Assumed salary increase rate	3			3			—			—
	The benefit obligation for all plans at December 31, 2014 included the application of a new mortality assumption based on the most recent study by the Society of Actuaries. The adoption of the new RP-2014 mortality table increased the average life expectancy of plan participants by 2 years. The decrease in the discount rate and the adoption of the new mortality assumption increased the benefit obligation for all plans at December 31, 2014.
	Weighted-average assumptions used to determine net periodic costs for the years ended December 31, 2014 and 2013 were as follows:
		Retirement Plans						Other Postretirement Benefits
		2014			2013			2014			2013
	Assumed discount rate	4.9	%		4	%		4.9	%		4	%
	Assumed long-term rate of investment return	7.5			7.5			—			—
	Assumed salary increase rate	3			3			—			—
Summary of Assumed Health Care Cost Trend Rates
	Assumed Health Care Cost Trend Rates		2014			2013			2012
	Health care cost trend rate assumed for next year		6	%		6.5	%		6.5	%
	Rate to which the cost trend rate is assumed to decline		5			5			5
	Year that the rate reaches the ultimate rate		2016			2015			2014
Effect of One Percentage-Point Change in Assumed Health Care Cost Trend Rates	A one-percentage-point change in the assumed health care cost trend rates would have the following effects:
		One Percentage Point
	(Dollars in thousands)	Increase				Decrease
	Effect on total of service and interest cost components	$	10			$	(10	)
	Effect on postretirement benefit obligation	114				(101		)
Summary of Corporation's Pension Plan Asset Allocation	The Corporation's pension plan asset allocation at December 31, 2014 and 2013, by asset category was as follows:
		Percentage of Plan Assets at December 31,
		2014			2013
	Asset Category:
	Equity securities	65	%		64	%
	Debt securities	34			35
	Other	1			1
	Total	100	%		100	%
Major Categories of Assets in Corporation's Pension Plan	The major categories of assets in the Corporation’s pension plan at year-end are presented in the following table. Assets are segregated by the level of the valuation inputs within the fair value hierarchy described in Note 18, “Fair Value Disclosures.”
		Fair Value Measurements at December 31,
	(Dollars in thousands)	2014				2013
	Level 1:
	Mutual funds:
	U.S. Large Cap	17,482				16,710
	U.S. Mid Cap	2,218				2,169
	U.S. Small Cap	2,290				2,341
	International	4,961				4,634
	Income	972				686
	Short-term investments	585				650
	Level 2:
	U.S. governement obligations	3,273				3,790
	Corporate bonds	5,621				5,228
	Level 3:
	Certificates of deposit	4,035				4,339
	Total fair value of plan assets	$	41,437			$	40,547
Reconciliation of Beginning and Ending Balances for Measurements in Hierarchy Level 3	The following table provides a reconciliation of the beginning and ending balances for measurements in hierarchy Level 3 at December 31, 2014 and 2013:
	(Dollars in thousands)	Balance at December 31, 2013				Total Unrealized (Losses) or Gains				Total Realized Gains or (Losses)			Purchases			Maturities/ Redemptions			Balance at December 31, 2014
	Certificates of deposit	$	4,339			$	—			$	—		$	595		$	(899	)	$	4,035
	Total Level 3 assets	$	4,339			$	—			$	—		$	595		$	(899	)	$	4,035
	(Dollars in thousands)	Balance at December 31, 2012				Total Unrealized (Losses) or Gains				Total Realized Gains or (Losses)			Purchases			Maturities/ Redemptions			Balance at December 31, 2013
	Certificates of deposit	$	4,503			$	—			$	—		$	280		$	(444	)	$	4,339
	Total Level 3 assets	$	4,503			$	—			$	—		$	280		$	(444	)	$	4,339

StockBased_Incentive_Plan_Tabl

Stock-Based Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Status of Options Granted Under Long-Term Incentive Plan	The following table is a summary of the status of options under the Corporation’s long-term incentive plans:
	(Dollars in thousands, except per share data)	Shares Under Option			Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value at December 31, 2014
	Outstanding at December 31, 2013	612,050			$	19.41
	Granted	114,000			18.78
	Expired	—			—
	Forfeited	(35,500	)		17.06
	Exercised	(17,334	)		17.92
	Outstanding at December 31, 2014	673,216			19.46				5.2		$	1,201
	Exercisable at December 31, 2014	393,662			21.07				3.1		351
Aggregated Assumptions Used to Estimate Fair Value of Options Granted	The following aggregated assumptions were used to estimate the fair value of options granted for the periods indicated:
		For the Years Ended December 31,
		2014				2013				2012
	Expected option life in years	8.2				8.9				8.2
	Risk free interest rate	2.51		%		1.99		%		1.63		%
	Expected dividend yield	4.26		%		4.74		%		5.4		%
	Expected volatility	50.16		%		49.3		%		50.74		%
	Fair value of options	$	6.53			$	5.32			$	4.37
Summary of Nonvested Restricted Stock Awards	Following is a summary of nonvested restricted stock awards at December 31, 2014 including changes during the year:
	(Dollars in thousands, except per share data)	Nonvested Share Awards			Weighted Average Grant Date Fair Value
	Nonvested share awards at December 31, 2013	185,423			$	16.4
	Granted	74,304			18.63
	Vested	(39,297	)		17.24
	Forfeited	(43,452	)		16.91
	Nonvested share awards at December 31, 2014	176,978			17.02
Certain Information Regarding Restricted Stock	The fair value of restricted stock is equivalent to the fair value on the date of grant and is amortized over the vesting period. Certain information regarding restricted stock is summarized below for the periods indicated:
	(Dollars in thousands, except per share data)	For the Years Ended December 31,
		2014				2013				2012
	Shares granted	74,304				70,041				71,157
	Weighted average grant date fair value	$	18.63			$	16.76			$	15.29
	Intrinsic value of awards vested	$	735			$	505			$	625
Compensation Expense Related to Stock Incentive Plans Recognized	The following table presents information related to the Corporation’s compensation expense related to stock incentive plans recognized for the periods indicated:
		For the Years Ended December 31,
	(Dollars in thousands)	2014				2013				2012
	Stock-based compensation expense:
	Stock options	$	463			$	517			$	408
	Restricted stock awards	679				461				859
	Employee stock purchase plan	46				38				36
	Total	$	1,188			$	1,016			$	1,303
	Tax benefit on nonqualified stock option expense, restricted stock awards and disqualifying dispositions of incentive stock options	$	244			$	162			$	296

Time_Deposits_Tables

Time Deposits (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Scheduled Maturities of Time Deposits over $100 Thousand	At December 31, 2014, the scheduled maturities of time deposits in denominations of $100 thousand or more are as follows:
	(Dollars in thousands)
	Due in 2015	$	41,844
	Due in 2016	20,140
	Due in 2017	9,232
	Due in 2018	2,251
	Due in 2019	1,967
	Thereafter	1,392
	Total	$	76,826

Borrowings_Tables

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Customer Repurchase Agreements	The following table details key information pertaining to customer repurchase agreements on an overnight basis for the periods indicated:
	(Dollars in thousands)	2014			2013			2012
	Balance at December 31	$	41,974		$	37,256		$	96,282
	Weighted average interest rate at year end	0.06		%	0.07		%	0.07		%
	Maximum amount outstanding at any month's end	$	43,266		$	110,228		$	117,291
	Average amount outstanding during the year	41,048			72,211			106,206
	Weighted average interest rate during the year	0.06		%	0.06		%	0.13		%

Earnings_per_Share_Tables

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share, Basic and Diluted [Abstract]
Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share:
		For the Years Ended December 31,
	(Dollars and shares in thousands)	2014		2013		2012
	Numerator for basic and diluted earnings per share—income available to common shareholders	$	22,231	$	21,189	$	20,872
	Denominator for basic earnings per share—weighted-average shares outstanding	16,235		16,605		16,761
	Effect of dilutive securities—employee stock options and awards	90		70		55
	Denominator for diluted earnings per share—adjusted weighted-average shares outstanding	16,325		16,675		16,816
	Basic earnings per share	$	1.37	$	1.28	$	1.25
	Diluted earnings per share	$	1.36	$	1.27	$	1.24
	Average anti-dilutive options and awards excluded from computation of diluted earnings per share	499		546		581

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes	The following table shows the components of accumulated other comprehensive loss, net of tax benefit, for the periods presented:
	(Dollars in thousands)	Net Unrealized				Net Change				Net Change				Accumulated
		Gains (Losses) on				Related to				Related to				Other
		Available-for-Sale				Derivatives Used				Defined Benefit				Comprehensive
		Investment				for Cash Flow				Pension Plans				Loss
		Securities				Hedges
	Balance, December 31, 2011	$	7,306			$	(932	)		$	(12,475	)		$	(6,101	)
	Net Change	1,038				(309		)		(1,548		)		(819		)
	Balance, December 31, 2012	8,344				(1,241		)		(14,023		)		(6,920		)
	Net Change	(9,816		)		1,241				5,540				(3,035		)
	Balance, December 31, 2013	(1,472		)		—				(8,483		)		(9,955		)
	Net Change	3,183				(157		)		(7,533		)		(4,507		)
	Balance, December 31, 2014	$	1,711			$	(157	)		$	(16,016	)		$	(14,462	)
Amounts Reclassified Out of Each Component of Accumulated Comprehensive (Loss) Income	The following table illustrates the amounts reclassified out of each component of accumulated comprehensive loss for the periods presented:
	Details about Accumulated Other		Amount Reclassified from Accumulated												Affected Line Item in the
	Comprehensive Loss Components		Other Comprehensive Loss												Statement of Income
			For the years ended December 31,
	(Dollars in thousands)		2014				2013				2012
	Net unrealized holding gains on available-for-sale investment securities:
			$	635			$	3,389			$	305			Net gain on sales of investment securities
			—				—				(13		)		Other-than-temporary impairment on equity securities
			635				3,389				292				Total before tax
			(222		)		(1,186		)		(102		)		Tax expense
			$	413			$	2,203			$	190			Net of tax
	Cash flow hedge derivative:
			$	—			$	(1,866	)		$	—			Net loss on interest rate swap
			—				(1,866		)		—				Total before tax
			—				653				—				Tax benefit
			$	—			$	(1,213	)		$	—			Net of tax
	Defined benefit pension plans:
	Amortization of net loss included in net periodic pension costs*		$	(666	)		$	(1,282	)		$	(1,170	)
	Accretion of prior service cost included in net periodic pension costs*		288				255				255
			(378		)		(1,027		)		(915		)		Total before tax
			132				360				320				Tax benefit
			$	(246	)		$	(667	)		$	(595	)		Net of tax
	*	These accumulated other comprehensive loss components are included in the computation of net periodic pension cost. (See Note 10—Retirement Plans and Other Postretirement Benefits for additional details.)

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Off-balance Sheet Financial Instruments	The following schedule summarizes the Corporation’s off-balance sheet financial instruments at December 31, 2014:
	(Dollars in thousands)	Contract/Notional Amount
	Financial instruments representing credit risk:
	Commitments to extend credit	$	538,488
	Performance letters of credit	19,240
	Financial standby letters of credit	27,526
	Other letters of credit	101
Summary of Future Minimum Rental Commitments Under Non-cancelable Operating Leases Net of Related Sublease Revenue	A summary of the future minimum rental commitments under non-cancelable operating leases with original or remaining terms greater than one year is as follows:
	(Dollars in thousands)
	Year	Amount
	2015	$	2,297
	2016	2,269
	2017	2,080
	2018	2,096
	2019	1,705
	Thereafter	23,092
	Total	$	33,539
Summary of Rental Expense Charged to Operations	The following table summarizes rental expense charged to operations for the periods indicated:
		For the Years Ended December 31,
	(Dollars in thousands)	2014			2013			2012
	Rental expense	$	2,732		$	2,304		$	2,250
	Sublease rental income	(238		)	(278		)	(396		)
	Net rental expense	$	2,494		$	2,026		$	1,854

Derivative_Instruments_and_Hed1

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts and Fair Values of Derivatives Not Designated as Hedging Instruments	The following table presents the notional amounts and fair values of derivatives not designated as hedging instruments recorded on the consolidated balance sheets at December 31, 2014 and 2013:
						Derivative Assets				Derivative Liabilities
	(Dollars in thousands)	Notional				Balance Sheet	Fair			Balance Sheet		Fair
		Amount				Classification	Value			Classification		Value
	At December 31, 2014
	Interest rate locks with customers	$	27,007			Other assets	$	788				$	—
	Forward loan sale commitments	30,537					—			Other liabilities		112
	Total	$	57,544				$	788				$	112
	At December 31, 2013
	Interest rate locks with customers	$	15,176			Other assets	$	321				$	—
	Forward loan sale commitments	17,425				Other assets	25					—
	Total	$	32,601				$	346				$	—
Notional Amounts and Fair Values of Derivatives Designated as Hedging Instruments	The following table presents the notional amounts and fair values of derivatives designated as hedging instruments recorded on the consolidated balance sheets at December 31, 2014 and 2013:
						Derivative Assets				Derivative Liabilities
	(Dollars in thousands)	Notional				Balance Sheet	Fair			Balance Sheet		Fair
		Amount				Classification	Value			Classification		Value
	At December 31, 2014
	Interest rate swap - cash flow hedge	$	19,945				$	—		Other liabilities		$	241
	Total	$	19,945				$	—				$	241
	At December 31, 2013
	Interest rate swap - cash flow hedge	$	—				$	—				$	—
	Total	$	—				$	—				$	—
Income for Derivatives Not Designated as Hedging Instruments	The following table presents amounts included in the consolidated statements of income for derivatives not designated as hedging instruments for the periods indicated:
		Statement of Income Classification		For the Years Ended December 31,
	(Dollars in thousands)			2014			2013			2012
	Interest rate locks with customers	Net gain (loss) on mortgage banking activities		$	467		$	(1,226	)	$	467
	Forward loan sale commitments	Net (loss) gain on mortgage banking activities		(137		)	79			248
	Total			$	330		$	(1,147	)	$	715
Income for Derivatives Designated as Hedging Instruments	The following table presents amounts included in the consolidated statements of income for derivatives designated as hedging instruments for the periods indicated:
		Statement of Income Classification		For the Years Ended December 31,
	(Dollars in thousands)			2014			2013			2012
	Interest rate swap—cash flow hedge—loss on termination	Net loss on termination of interest rate swap		$	—		$	(1,866	)	$	—
	Interest rate swap—cash flow hedge—interest payments	Interest expense		66			124			448
	Interest rate swap—cash flow hedge—ineffectiveness	Interest expense		—			—			—
	Net loss			$	(66	)	$	(1,990	)	$	(448	)
Amounts Included in Accumulated Other Comprehensive (Loss) Income for Derivatives Designated as Hedging Instruments	The following table presents amounts included in accumulated other comprehensive (loss) income for derivatives designated as hedging instruments for the periods indicated:
		Accumulated Other		For the Years Ended December 31,
	(Dollars in thousands)	Comprehensive (Loss) Income		2014			2013			2012
	Interest rate swap—cash flow hedge	Fair value, net of taxes		$	(157	)	$	—		$	(1,241	)
	Total			$	(157	)	$	—		$	(1,241	)

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table presents the assets and liabilities measured at fair value on a recurring basis at December 31, 2014 and 2013, classified using the fair value hierarchy:
		At December 31, 2014
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/
										Liabilities at
										Fair Value
	Assets:
	Available-for-sale securities:
	U.S. treasuries	$	4,845	$	—		$	—		$	4,845
	U.S. government corporations and agencies	—		121,844			—			121,844
	State and political subdivisions	—		102,774			—			102,774
	Residential mortgage-backed securities	—		13,643			—			13,643
	Collateralized mortgage obligations	—		3,725			—			3,725
	Corporate bonds	—		54,440			—			54,440
	Money market mutual funds	11,675		—			—			11,675
	Equity securities	1,337		—			—			1,337
	Total available-for-sale securities	17,857		296,426			—			314,283
	Interest rate locks with customers	—		788			—			788
	Total assets	$	17,857	$	297,214		$	—		$	315,071
	Liabilities:
	Interest rate swap	$	—	$	241		$	—		$	241
	Forward loan sale commitments	—		112			—			112
	Contingent consideration liability	—		—			6,541			6,541
	Total liabilities	$	—	$	353		$	6,541		$	6,894
		At December 31, 2013
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/
										Liabilities at
										Fair Value
	Assets:
	Available-for-sale securities:
	U.S. treasuries	$	4,708	$	—		$	—		$	4,708
	U.S. government corporations and agencies	—		128,148			—			128,148
	State and political subdivisions	—		107,657			—			107,657
	Residential mortgage-backed securities	—		35,480			—			35,480
	Collateralized mortgage obligations	—		7,201			—			7,201
	Corporate bonds	—		33,840			—			33,840
	Money market mutual funds	16,900		—			—			16,900
	Equity securities	2,347		—			—			2,347
	Total available-for-sale securities	23,955		312,326			—			336,281
	Interest rate locks with customers	—		321			—			321
	Forward loan sale commitments	—		25			—			25
	Total assets	$	23,955	$	312,672		$	—		$	336,627
	Liabilities:
	Contingent consideration liability	$	—	$	—		$	501		$	501
	Total liabilities	$	—	$	—		$	501		$	501
Contingent Consideration Liability Change in Amount	The following table presents the change in the balance of the contingent consideration liability related to acquisitions for which the Corporation utilized Level 3 inputs to determine fair value on a recurring basis for the years ended December 31, 2014 and 2013:
		For the Year Ended December 31, 2014
	(Dollars in thousands)	Balance at		Contingent			Payment of			Adjustment			Balance at December 31, 2014
		December 31,		Consideration			Contingent			of Contingent
		2013		from New			Consideration			Consideration
				Acquisition
	Sterner Insurance Associates	$	—	$	635		$	—		$	45		$	680
	Girard Partners	—		5,470			—			33			5,503
	John T. Fretz Insurance Agency	501		—			(310		)	167			358
	Total contingent consideration liability	$	501	$	6,105		$	(310	)	$	245		$	6,541
		For the Year Ended December 31, 2013
	(Dollars in thousands)	Balance at		Contingent			Payment of			Adjustment			Balance at December 31, 2013
		December 31,		Consideration			Contingent			of Contingent
		2012		from New			Consideration			Consideration
				Acquisition
	John T. Fretz Insurance Agency	$	—	$	454		$	—		$	47		$	501
	Javers Group	903		—			—			(903		)	—
	Total contingent consideration liability	$	903	$	454		$	—		$	(856	)	$	501
Assets Measured at Fair Value on Non-Recurring Basis	The following table represents assets measured at fair value on a non-recurring basis at December 31, 2014 and 2013:
		At December 31, 2014
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/Liabilities at
										Fair Value
	Impaired loans held for investment	$	—	$	—		$	55,193		$	55,193
	Total	$	—	$	—		$	55,193		$	55,193
		At December 31, 2013
	(Dollars in thousands)	Level 1		Level 2			Level 3			Assets/Liabilities at
										Fair Value
	Impaired loans held for investment	$	—	$	—		$	55,370		$	55,370
	Total	$	—	$	—		$	55,370		$	55,370
Assets, Liabilities and Off-Balance Sheet Items Not Measured at Fair Value	The following table presents assets and liabilities and off-balance sheet items not measured at fair value on a recurring or non-recurring basis in the Corporation’s consolidated balance sheets but for which the fair value is required to be disclosed at December 31, 2014 and 2013. The disclosed fair values are classified using the fair value hierarchy.
		At December 31, 2014
	(Dollars in thousands)	Level 1		Level 2			Level 3			Fair			Carrying
										Value			Amount
	Assets:
	Cash and short-term interest-earning assets	$	38,565	$	—		$	—		$	38,565		$	38,565
	Held-to-maturity securities	—		54,765			—			54,765			54,347
	Loans held for sale	—		3,374			—			3,374			3,302
	Net loans and leases held for investment	—		—			1,555,033			1,555,033			1,550,770
	Mortgage servicing rights	—		—			6,941			6,941			5,509
	Other real estate owned	—		955			—			955			955
	Total assets	$	38,565	$	59,094		$	1,561,974		$	1,659,633		$	1,653,448
	Liabilities:
	Deposits:
	Demand and savings deposits, non-maturity	$	1,608,748	$	—		$	—		$	1,608,748		$	1,608,748
	Time deposits	—		254,224			—			254,224			252,593
	Total deposits	1,608,748		254,224			—			1,862,972			1,861,341
	Short-term borrowings	—		38,631			—			38,631			41,974
	Total liabilities	$	1,608,748	$	292,855		$	—		$	1,901,603		$	1,903,315
	Off-Balance-Sheet:
	Commitments to extend credit	$	—	$	(1,420	)	$	—		$	(1,420	)	$	—
		At December 31, 2013
	(Dollars in thousands)	Level 1		Level 2			Level 3			Fair			Carrying
										Value			Amount
	Assets:
	Cash and short-term interest-earning assets	$	69,169	$	—		$	—		$	69,169		$	69,169
	Held-to-maturity securities	—		66,853			—			66,853			66,003
	Loans held for sale	—		2,267			—			2,267			2,267
	Net loans and leases held for investment	—		—			1,477,945			1,477,945			1,461,620
	Mortgage servicing rights	—		7,188			—			7,188			5,519
	Other real estate owned	—		1,650			—			1,650			1,650
	Total assets	$	69,169	$	77,958		$	1,477,945		$	1,625,072		$	1,606,228
	Liabilities:
	Deposits:
	Demand and savings deposits, non-maturity	$	1,573,709	$	—		$	—		$	1,573,709		$	1,573,709
	Time deposits	—		268,909			—			268,909			270,789
	Total deposits	1,573,709		268,909			—			1,842,618			1,844,498
	Short-term borrowings	—		35,687			—			35,687			37,256
	Total liabilities	$	1,573,709	$	304,596		$	—		$	1,878,305		$	1,881,754
	Off-Balance-Sheet:
	Commitments to extend credit	$	—	$	(1,357	)	$	—		$	(1,357	)	$	—

Restructuring_Charges_Tables

Restructuring Charges (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Roll Forward of Accrued Restructuring Expense	A roll-forward of the accrued restructuring expense is as follows:
	(Dollars in thousands)	Severance
	Accrued at January 1, 2013	$	—
	Restructuring charge	437
	Payments	(432		)
	Adjustment of restructuring charge	(5		)
	Accrued at December 31, 2013	$	—

Regulatory_Matters_Tables

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	Quantitative measures established by regulation to ensure capital adequacy require the Corporation and the Bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined).
	(Dollars in thousands)	Actual				For Capital Adequacy				To Be Well-Capitalized
						Purposes				Under Prompt
										Corrective Action
										Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
	At December 31, 2014
	Total Capital (to Risk-Weighted Assets):
	Corporation	$	249,388	12.91	%	$	154,589	8	%	$	193,237	10	%
	Bank	232,080		12.15		152,796		8	%	190,995		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	227,907		11.79		77,295		4	%	115,942		6	%
	Bank	210,816		11.04		76,398		4	%	114,597		6	%
	Tier 1 Capital (to Average Assets):
	Corporation	227,907		10.55		86,371		4	%	107,964		5	%
	Bank	210,816		9.8		86,005		4	%	107,506		5	%
	At December 31, 2013
	Total Capital (to Risk-Weighted Assets):
	Corporation	$	256,329	13.9	%	$	147,568	8	%	$	184,460	10	%
	Bank	238,336		13.06		145,991		8	%	182,489		10	%
	Tier 1 Capital (to Risk-Weighted Assets):
	Corporation	232,946		12.63		73,784		4	%	110,676		6	%
	Bank	215,497		11.81		72,995		4	%	109,493		6	%
	Tier 1 Capital (to Average Assets):
	Corporation	232,946		10.85		85,876		4	%	107,346		5	%
	Bank	215,497		10.11		85,277		4	%	106,597		5	%

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Summary of Activity for Loans to Related Parties	The following table provides a summary of activity for loans to Related Parties during the year ended December 31, 2014:
	(Dollars in thousands)
	Balance at January 1, 2014	$	27,802
	Additions	10,551
	Amounts collected and other reductions	(7,668		)
	Balance at December 31, 2014	$	30,685
Summary of Transactions with Related Parties	The following table provides additional information regarding transactions with Related Parties:
	(Dollars in thousands)	At December 31, 2014
	Commitments to extend credit	$	16,453
	Standby and commercial letters of credits	223
	Deposits received	10,342

Segment_Reporting_Tables

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Segment Reporting	The following tables provide reportable segment-specific information and reconciliations to consolidated financial information for the years ended December 31, 2014, 2013 and 2012. Prior period information is shown for comparative purposes as if the realignment of Wealth Management occurred at the beginning of each period.
	(Dollars in thousands)	Banking		Wealth Management		Insurance		Other			Consolidated
	For the Year Ended December 31, 2014
	Interest income	$	75,850	$	1	$	—	$	34		$	75,885
	Interest expense	3,998		—		—		(2		)	3,996
	Net interest income	71,852		1		—		36			71,889
	Provision for loan and lease losses	3,607		—		—		—			3,607
	Noninterest income	16,170		19,918		12,038		525			48,651
	Noninterest expense*	63,120		13,855		11,435		(1,156		)	87,254
	Income before income taxes	21,295		6,064		603		1,717			29,679
	Income taxes	4,043		2,269		256		880			7,448
	Net income	$	17,252	$	3,795	$	347	$	837		$	22,231
	Total assets	$	2,154,485	$	34,195	$	22,930	$	23,711		$	2,235,321
	Capital expenditures	$	2,824	$	100	$	593	$	169		$	3,686
	For the Year Ended December 31, 2013
	Interest income	$	77,517	$	1	$	—	$	61		$	77,579
	Interest expense	4,641		—		—		476			5,117
	Net interest income	72,876		1		—		(415		)	72,462
	Provision for loan and lease losses	11,228		—		—		—			11,228
	Noninterest income	22,053		14,938		9,959		(166		)	46,784
	Noninterest expense*	60,759		10,079		8,749		1,546			81,133
	Income (expense) before income taxes	22,942		4,860		1,210		(2,127		)	26,885
	Income tax expense (benefit)	4,255		1,850		497		(906		)	5,696
	Net income	$	18,687	$	3,010	$	713	$	(1,221	)	$	21,189
	Total assets	$	2,129,314	$	22,737	$	19,524	$	19,984		$	2,191,559
	Capital expenditures	$	2,679	$	13	$	46	$	692		$	3,430
	For the Year Ended December 31, 2012
	Interest income	$	80,568	$	3	$	3	$	80		$	80,654
	Interest expense	6,983		—		—		1,191			8,174
	Net interest income	73,585		3		3		(1,111		)	72,480
	Provision for loan and lease losses	10,035		—		—		—			10,035
	Noninterest income	18,018		12,906		8,079		1,257			40,260
	Noninterest expense*	57,917		9,626		7,782		957			76,282
	Income (expense) before income taxes	23,651		3,283		300		(811		)	26,423
	Income tax expense (benefit)	4,318		1,266		113		(146		)	5,551
	Net income	$	19,333	$	2,017	$	187	$	(665	)	$	20,872
	Capital expenditures	$	2,950	$	53	$	37	$	190		$	3,230
	*Includes an allocation of general and administrative expenses from both the parent holding company and the Bank. Generally speaking, these expenses are allocated based upon number of employees and square footage usage.

Condensed_Financial_Informatio1

Condensed Financial Information - Parent Company Only (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Schedule of Condensed Balance Sheet	Condensed financial statements of the Corporation, parent company only, follow:
	(Dollars in thousands)	At December 31,
	Balance Sheets	2014			2013
	Assets:
	Cash and due from banks	$	3,120		$	2,999
	Investments in securities	1,336			2,347
	Investments in subsidiaries, at equity in net assets:
	Bank	283,166			271,147
	Non-banks	—			—
	Other assets	21,115			17,658
	Total assets	$	308,737		$	294,151
	Liabilities:
	Dividends payable	$	3,243		$	3,257
	Other liabilities	20,940			10,388
	Total liabilities	24,183			13,645
	Shareholders' equity:	284,554			280,506
	Total liabilities and shareholders' equity	$	308,737		$	294,151
Schedule of Condensed Income Statement
	(Dollars in thousands)	For the Years Ended December 31,
	Statements of Income	2014			2013			2012
	Dividends from bank	$	12,482		$	18,482		$	20,482
	Dividends from non-bank	—			—			1,200
	Other-than-temporary impairment on equity securities	—			—			(13		)
	Net gain on sales of securities	306			644			70
	Loss on termination of interest rate swap	—			(1,866		)	—
	Other income	18,334			18,306			17,463
	Total operating income	31,122			35,566			39,202
	Operating expenses	16,924			19,203			18,323
	Income before income tax expense (benefit) and equity in undistributed income (loss) of subsidiaries	14,198			16,363			20,879
	Income tax expense (benefit)	880			(903		)	(143		)
	Income before equity in undistributed income (loss) of subsidiaries	13,318			17,266			21,022
	Equity in undistributed income (loss) of subsidiaries:
	Bank	8,913			3,929			(140		)
	Non-banks	—			(6		)	(10		)
	Net income	$	22,231		$	21,189		$	20,872
Schedule of Condensed Cash Flow Statement
	(Dollars in thousands)	For the Years Ended December 31,
	Statements of Cash Flows	2014			2013			2012
	Cash flows from operating activities:
	Net income	$	22,231		$	21,189		$	20,872
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net (income) loss of subsidiaries	(8,913		)	(3,923		)	150
	Other-than-temporary impairment on equity securities	—			—			13
	Net gain on sales of securities	(306		)	(644		)	(70		)
	Loss on termination of interest rate swap	—			1,866			—
	Bank owned life insurance income	(238		)	(1,070		)	(255		)
	Depreciation of premises and equipment	364			344			358
	Stock based compensation	1,141			978			1,267
	Contributions to pension and other postretirement benefit plans	(254		)	(2,243		)	(8,215		)
	Decrease in other assets	714			671			6,270
	(Decrease) increase in other liabilities	(639		)	(2,426		)	2,451
	Net cash provided by operating activities	14,100			14,742			22,841
	Cash flow from investing activities:
	Proceeds from sales of securities	1,131			1,244			2,666
	Liquidation of subsidiary, net of cash acquired	—			15,011			1,096
	Proceeds from bank owned life insurance	—			772			178
	Other, net	(281		)	(713		)	1,280
	Net cash provided by investing activities	850			16,314			5,220
	Cash flows from financing activities:
	Repayment of long-term debt	—			(375		)	(1,500		)
	Payment for repurchase of trust preferred securities	—			(20,619		)	—
	Purchases of treasury stock	(4,605		)	(12,012		)	(2,319		)
	Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit plans	2,462			2,422			2,515
	Proceeds from exercise of stock options	310			—			—
	Cash dividends paid	(12,996		)	(10,029		)	(16,755		)
	Net cash used in financing activities	(14,829		)	(40,613		)	(18,059		)
	Net increase (decrease) in cash and due from financial institutions	121			(9,557		)	10,002
	Cash and due from financial institutions at beginning of year	2,999			12,556			2,554
	Cash and due from financial institutions at end of year	$	3,120		$	2,999		$	12,556
	Supplemental disclosures of cash flow information:
	Cash paid during the year for:
	Interest	$	2		$	754		$	1,194
	Income tax, net of refunds received	5,300			5,017			1,180

Quarterly_Financial_Data_unaud1

Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	The unaudited results of operations for the quarters for the years ended December 31, 2014 and 2013 were as follows:
	(Dollars in thousands, except per share data)
	2014 Quarterly Financial Data:	Fourth		Third		Second		First
	Interest income	$	18,995	$	19,219	$	18,725	$	18,946
	Interest expense	1,039		978		981		998
	Net interest income	17,956		18,241		17,744		17,948
	Provision for loan and lease losses	648		233		1,251		1,475
	Net interest income after provision for loan and lease losses	17,308		18,008		16,493		16,473
	Noninterest income	12,076		12,510		11,924		12,141
	Noninterest expense	22,562		22,019		21,790		20,883
	Income before income taxes	6,822		8,499		6,627		7,731
	Income taxes	1,632		2,264		1,547		2,005
	Net income	$	5,190	$	6,235	$	5,080	$	5,726
	Per share data:
	Basic	$	0.32	$	0.38	$	0.31	$	0.35
	Diluted	$	0.32	$	0.38	$	0.31	$	0.35
	Dividends per share	$	0.2	$	0.2	$	0.2	$	0.2
	2013 Quarterly Financial Data:	Fourth		Third		Second		First
	Interest income	$	19,172	$	19,457	$	19,461	$	19,489
	Interest expense	1,080		1,138		1,353		1,546
	Net interest income	18,092		18,319		18,108		17,943
	Provision for loan and lease losses	1,614		4,094		3,446		2,074
	Net interest income after provision for loan and lease losses	16,478		14,225		14,662		15,869
	Noninterest income	11,116		13,202		10,991		11,475
	Noninterest expense	21,623		19,988		19,286		20,236
	Income before income taxes	5,971		7,439		6,367		7,108
	Income taxes	1,049		1,400		1,537		1,710
	Net income	$	4,922	$	6,039	$	4,830	$	5,398
	Per share data:
	Basic	$	0.3	$	0.36	$	0.29	$	0.32
	Diluted	$	0.3	$	0.36	$	0.29	$	0.32
	Dividends per share	$	0.2	$	0.2	$	0.2	$	0.2

Subsequent_Event_Tables

Subsequent Event (Tables)	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the consideration paid for Valley Green Bank and the fair value of assets acquired and liabilities assumed at the acquisition date:
	(Dollars in thousands, except share data)
	Purchase price consideration in common stock:
	Valley Green common shares outstanding	2,797,454
	Exchange ratio	1.3541
	Univest shares issued	3,787,866
	Univest closing stock price at December 31, 2014	$	20.24
	Purchase price assigned to Valley Green common shares exchanged for Univest stock				$	76,667
	Purchase price assigned to cash in lieu of fractional shares				3
	Purchase price assigned to Valley Green options settled for cash				2,236
	Total purchase price				$	78,906
	Fair value of assets acquired:
	Cash and due from banks	$	4,919
	Federal funds sold	17,442
	Investment securities available-for-sale	12,766
	Loans held for investment	382,892
	Premises and equipment, net	3,102
	Core deposit intangible	1,867
	Accrued interest receivable and other assets	3,779
	Total identifiable assets				426,767
	Fair value of liabilities assumed:
	Deposits - noninterest bearing	$	49,826
	Deposits - interest bearing	336,086
	Change in control accrued payments	2,070
	Accrued interest payable and other liabilities	1,792
	Total liabilities				389,774
	Net identifiable net assets				36,993
	Goodwill resulting from merger (1)				$	41,913
	(1) - Goodwill is not expected to be deductible for federal income tax purposes. The goodwill is allocated to the Banking business segment.
Schedule Of Impaired Financing Receivable Table	The following is a summary of the acquired impaired loans at January 1, 2015 resulting from the merger with Valley Green:
	(Dollars in thousands)
	Contractually required principal and interest payments	$	4,539
	Contractual cash flows not expected to be collected (nonaccretable difference)	(2,848		)
	Cash flows expected to be collected	1,691
	Interest component of expected cash flows (accretable difference)	(291		)
	Fair value of loans acquired with a deterioration of credit quality	$	1,400
Business Acquisition, Pro Forma Information	The unaudited pro forma data presented below is based on, and should be read together with, the historical financial information of the Corporation included in this Form 10-K for the indicated periods and the historical information of Valley Green Bank included in the Corporation's Current Report on Form 8-K filed with the SEC on January 7, 2015.
		Pro Forma For the Years Ended December 31,
	(Dollars in thousands, except share data)	2014				2013
	Net interest income	$	92,356			$	89,897
	Noninterest income	49,325				47,550
	Noninterest expense	98,792				90,456
	Net income	27,503				26,557
	Earnings per share
	Basic	$	1.37			$	1.3
	Diluted	1.37				1.3

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2015
	community		Office
	Office
	segment
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments (in segments)	3
Number of banking offices (in offices)	31
Number of retirement communities with banking and trust services (in communities)	12
Number of days loan or lease past due for nonaccrual of interest status	90 days
Maximum stock issuable under Univest Dividend Reinvestment Plan	1,968,750
Stock issued under Univest dividend reinvestment plan	82,922	95,639
Shares available for future purchase under Univest dividend reinvestment plan	552,181
Maximum stock issuable under employees stock purchase plan	2,000,000
Nineteen Ninety Six Employee Stock Purchase Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum stock issuable under employees stock purchase plan	984,375
Minimum employees contributions to the purchase plan	2.00%
Maximum employees contributions to the purchase plan	10.00%
Employee Stock Purchase Plan, Percentage of Purchase Price of Stock Based on closing price on Last Trading Day of Each Quarter End	90.00%
Maximum discount from fair value to recognize compensation expense for employee stock purchase plan	5.00%
Stock issued under employee stock purchase plans	23,271	20,195
Shares available for future purchase under employee stock purchase plans	732,624
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	3 years
Minimum [Member] | Customer Related [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	5 years
Minimum [Member] | Noncompete Agreements [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	10 years
Maximum [Member] | Core Deposits and Other Intangible Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	15 years
Maximum [Member] | Customer Related [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	12 years
Maximum [Member] | Noncompete Agreements [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	5 years
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Building [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Land Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	15 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	10 years
Restricted Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	3 years
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of banking offices operated in greater Philadelphia marketplace (in offices)			3

Restrictions_on_Cash_and_Due_f1

Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]
Reserve requirement at Federal Reserve Bank	$2,500,000	$8,300,000
Average balances at Federal Reserve Bank	31,500,000	44,500,000
Interest-earning deposit accounts pledged for Risk Participation Agreements	$370,000	$690,000

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended		12 Months Ended	0 Months Ended
	Jul. 01, 2014	Jun. 17, 2014	Dec. 31, 2014	Jan. 27, 2014	Dec. 31, 2013
			community
			Office
Business Acquisition [Line Items]
Total assets			$2,235,321,000		$2,191,559,000
Deposits			1,861,341,000		1,844,498,000
Assets under management, Carrying amount				3,000,000,000
Sterner Insurance Associates Inc [Member]
Business Acquisition [Line Items]
Acquisition completion date	1-Jul-14
Cash paid for acquisition	3,900,000
Fair value of assumed liabilities with additional contingent consideration	940,000
Potential cash payments from contingent consideration, period of measurement (in years)	3 years
Potential cash payments from contingent consideration, end date	30-Jun-17
Fair value of contingent consideration liability	635,000
Original potential cash payments from contingent consideration, minimum	0
Original potential cash payments from contingent consideration, maximum	5,700,000
Business Combination, Contingent Consideration, Cumulative Period	3 years
Goodwill related to acquisition, tax deductible	3,400,000
Customer-related intangibles	1,600,000
Amortization period	9 years
Valley Green Bank [Member]
Business Acquisition [Line Items]
Business merger, Date of merger agreement		17-Jun-14
Total purchase price		78,900,000
Total assets			425,000,000
Loan			386,000,000
Deposits			385,000,000
Number of banking offices operated in greater Philadelphia marketplace (in offices)			3
Number of loan production offices in Philadelphia marketplace			2
Girard Partners [Member]
Business Acquisition [Line Items]
Acquisition completion date				27-Jan-14
Cash paid for acquisition				5,400,000
Potential cash payments from contingent consideration, period of measurement (in years)				5 years
Potential cash payments from contingent consideration, end date				31-Dec-18
Fair value of contingent consideration liability				5,500,000
Original potential cash payments from contingent consideration, minimum				0
Original potential cash payments from contingent consideration, maximum				14,500,000
Goodwill related to acquisition, tax deductible				6,800,000
Customer-related intangibles				4,300,000
Assets under management, Carrying amount				$500,000,000
Effective date of acquisition				1-Jan-14
Customer related intangibles amortized period				9 years

Investment_Securities_HeldtoMa

Investment Securities - Held-to-Maturity and Available-for-Sale, Scheduled Maturities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Held-to-maturity Securities [Abstract]
Securities Held-to-Maturity, Amortized Cost	$54,347	$66,003
Securities Held-to-Maturity, Gross Unrealized Gains	470	1,114
Securities Held-to-Maturity, Gross Unrealized Losses	-52	-264
Securities Held-to-Maturity, Fair Value	54,765	66,853
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost	311,651	338,546
Securities Available-for-Sale, Gross Unrealized Gains	4,160	2,883
Securities Available-for-Sale, Gross Unrealized Losses	-1,528	-5,148
Securities Available-for-Sale, Fair Value	314,283	336,281
U.S. Treasuries [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	4,972	0
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	-127	0
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	4,845	0
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	0	4,966
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	0	-258
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	0	4,708
Securities Available-for-Sale, Amortized Cost	4,972	4,966
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Securities Available-for-Sale, Gross Unrealized Losses	-127	-258
Securities Available-for-Sale, Fair Value	4,845	4,708
U.S. Government Corporations and Agencies [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 year	0	5,999
Securities Available-for-Sale, Gross Unrealized Gains, Within 1 year	0	16
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 year	0	0
Securities Available-for-Sale, Fair Value, Within 1 year	0	6,015
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	122,328	112,989
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	48	114
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	-532	-1,226
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	121,844	111,877
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	0	10,816
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	0	-560
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	0	10,256
Securities Available-for-Sale, Amortized Cost	122,328	129,804
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	48	130
Securities Available-for-Sale, Gross Unrealized Losses	-532	-1,786
Securities Available-for-Sale, Fair Value	121,844	128,148
State and Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 year	600	1,564
Securities Available-for-Sale, Gross Unrealized Gains, Within 1 year	2	13
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 year	0	0
Securities Available-for-Sale, Fair Value, Within 1 year	602	1,577
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	12,326	5,305
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	17	14
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	-59	-29
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	12,284	5,290
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	49,554	41,974
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	1,616	710
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	-77	-698
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	51,093	41,986
Securities Available-for-Sale, Amortized Cost, Over 10 years	37,004	57,899
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	1,792	1,227
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	-1	-322
Securities Available-for-Sale, Fair Value, Over 10 years	38,795	58,804
Securities Available-for-Sale, Amortized Cost	99,484	106,742
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	3,427	1,964
Securities Available-for-Sale, Gross Unrealized Losses	-137	-1,049
Securities Available-for-Sale, Fair Value	102,774	107,657
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	5,066	0
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	17	0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	0	0
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	5,083	0
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	4,856	10,008
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	0	5
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	-32	-53
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	4,824	9,960
Securities Available-for-Sale, Amortized Cost, Over 10 years	3,661	25,721
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	75	20
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	0	-221
Securities Available-for-Sale, Fair Value, Over 10 years	3,736	25,520
Securities Available-for-Sale, Amortized Cost	13,583	35,729
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	92	25
Securities Available-for-Sale, Gross Unrealized Losses	-32	-274
Securities Available-for-Sale, Fair Value	13,643	35,480
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	0	73
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	0	0
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	0	73
Securities Available-for-Sale, Amortized Cost, Over 10 years	3,810	7,341
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	0	40
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	-85	-253
Securities Available-for-Sale, Fair Value, Over 10 years	3,725	7,128
Securities Available-for-Sale, Amortized Cost	3,810	7,414
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	40
Securities Available-for-Sale, Gross Unrealized Losses	-85	-253
Securities Available-for-Sale, Fair Value	3,725	7,201
Corporate Bonds [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 year	4,998	0
Securities Available-for-Sale, Gross Unrealized Gains, Within 1 year	22	0
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 year	0	0
Securities Available-for-Sale, Fair Value, Within 1 year	5,020	0
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	29,505	18,838
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	88	52
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	-244	-411
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	29,349	18,479
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	20,442	16,474
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	0	4
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	-371	-1,117
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	20,071	15,361
Securities Available-for-Sale, Amortized Cost	54,945	35,312
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	110	56
Securities Available-for-Sale, Gross Unrealized Losses	-615	-1,528
Securities Available-for-Sale, Fair Value	54,440	33,840
Money Market Mutual Funds [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost	11,675	16,900
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Securities Available-for-Sale, Gross Unrealized Losses	0	0
Securities Available-for-Sale, Fair Value	11,675	16,900
Equity Securities [Member]
Available-for-sale Securities [Abstract]
Equity Securities Available-for-Sale, Amortized Cost, No stated maturity	854	1,679
Equity Securities Available-for-Sale, Gross Unrealized Gains, No stated maturity	483	668
Equity Securities Available-for-Sale, Gross Unrealized Loss, No stated maturity	0	0
Equity Securities Available-for-Sale, Fair Value, No stated maturity	1,337	2,347
Equity Securities Available-for-Sale, Amortized Cost	854	1,679
Equity Securities Available-for-Sale, Gross Unrealized Gains	483	668
Equity Securities Available-for-Sale, Gross Unrealized Loss	0	0
Equity Securities Available-for-Sale, Fair Value	1,337	2,347
Corporate Bonds [Member]
Held-to-maturity Securities [Abstract]
Securities Held-to-Maturity, Amortized Cost, Within 1 year	13,088	11,148
Securities Held-to-Maturity, Gross Unrealized Gains, Within 1 year	82	122
Securities Held-to-Maturity, Gross Unrealized Losses, Within 1 year	0	0
Securities Held-to-Maturity, Fair Value, Within 1 year	13,170	11,270
Securities Held-to-Maturity, Amortized Cost, After 1 year to 5 years	41,259	54,855
Securities Held-to-Maturity, Gross Unrealized Gains, After 1 year to 5 years	388	992
Securities Held-to-Maturity, Gross Unrealized Losses, After 1 year to 5 years	-52	-264
Securities Held-to-Maturity, Fair Value, After 1 year to 5 years	41,595	55,583
Securities Held-to-Maturity, Amortized Cost	54,347	66,003
Securities Held-to-Maturity, Gross Unrealized Gains	470	1,114
Securities Held-to-Maturity, Gross Unrealized Losses	-52	-264
Securities Held-to-Maturity, Fair Value	$54,765	$66,853

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Investment	Investment
Investments, Debt and Equity Securities [Abstract]
Carrying value of securities pledged to secure public deposits and for other purposes as required by law	$230.90	$271.10
Number of investments in non-federal issuer representing more than 10% of shareholders' equity	0	0
Maximum investment in any single non-federal issuer representing shareholders' equity	10.00%	10.00%

Investment_Securities_Informat

Investment Securities - Information Related to Sales of Securities Available-for-Sale (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Securities available-for-sale:
Proceeds from sales	$32,967	$76,361	$57,186
Gross realized gains on sales	635	3,396	1,201
Gross realized losses on sales	0	7	896
Tax expense related to net realized gains on sales	$222	$1,186	$107

Investment_Securities_Amount_o

Investment Securities - Amount of Securities in Unrealized Loss Position (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$15,036	$19,942
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-27	-264
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4,987	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-25	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	20,023	19,942
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	-52	-264
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	76,626	196,846
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-471	-5,148
Twelve Months or Longer, Fair Value	95,818	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-1,057	0
Total, Fair Value	172,444	196,846
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-1,528	-5,148
Corporate Bonds [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,036	19,942
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-27	-264
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4,987	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-25	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	20,023	19,942
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	-52	-264
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	21,949	26,557
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-328	-1,528
Twelve Months or Longer, Fair Value	15,805	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-287	0
Total, Fair Value	37,754	26,557
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-615	-1,528
U.S. Treasuries [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	0	4,708
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	-258
Twelve Months or Longer, Fair Value	4,845	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-127	0
Total, Fair Value	4,845	4,708
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-127	-258
U.S. Government Corporations and Agencies [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	39,607	101,813
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-80	-1,786
Twelve Months or Longer, Fair Value	62,140	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-452	0
Total, Fair Value	101,747	101,813
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-532	-1,786
State and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	10,246	30,233
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-31	-1,049
Twelve Months or Longer, Fair Value	9,303	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-106	0
Total, Fair Value	19,549	30,233
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-137	-1,049
Residential Mortgage-Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	4,824	29,444
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-32	-274
Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Total, Fair Value	4,824	29,444
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	-32	-274
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than Twelve Months, Fair Value	0	4,091
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	-253
Twelve Months or Longer, Fair Value	3,725	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	-85	0
Total, Fair Value	3,725	4,091
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	($85)	($253)

Loans_and_Leases_Summary_of_Ma

Loans and Leases - Summary of Major Loan and Lease Categories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	$1,626,625	$1,541,484
Unearned lease income, included in the above table	-14,131	-14,439
Net deferred costs, included in the above table	3,218	2,744
Overdraft deposits included in the above table	50	62
Commercial, Financial and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	457,827	422,816
Real Estate-Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	628,478	600,353
Real Estate-Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	79,887	90,493
Real Estate-Residential Secured for Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	36,932	37,319
Real Estate-Residential Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	166,850	149,164
Real Estate-Home Equity Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	108,250	95,345
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	29,941	40,000
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases held for investment, net of deferred income	$118,460	$105,994

Loans_and_Leases_Lease_Payment

Loans and Leases - Lease Payments Receivables (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Receivables [Abstract]
Within 1 year	$50,340	$43,911
After 1 year through 2 years	38,084	33,302
After 2 years through 3 years	25,888	23,723
After 3 years through 4 years	13,667	14,335
After 4 years through 5 years	4,312	4,983
Thereafter	300	179
Total future minimum lease payments receivable	132,591	120,433
Less: Unearned income	-14,131	-14,439
Total lease financing receivables, net of unearned income	$118,460	$105,994

Loans_and_Leases_Age_Analysis_

Loans and Leases - Age Analysis of Past Due Loans and Leases (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$3,405	$4,896
60-89 Days Past Due	3,196	2,205
90 Days or more Past Due	11,043	18,164
Total Past Due	17,644	25,265
Current	1,608,981	1,516,219
Total Loans and Leases Held for Investment	1,626,625	1,541,484
Recorded Investment 90 Days or more Past Due and Accruing Interest	451	413
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	145	386
60-89 Days Past Due	747	922
90 Days or more Past Due	2,567	2,904
Total Past Due	3,459	4,212
Current	454,368	418,604
Total Loans and Leases Held for Investment	457,827	422,816
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	12
Real Estate-Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	361	148
60-89 Days Past Due	913	262
90 Days or more Past Due	1,163	4,932
Total Past Due	2,437	5,342
Current	626,041	595,011
Total Loans and Leases Held for Investment	628,478	600,353
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	405	0
90 Days or more Past Due	5,525	8,742
Total Past Due	5,930	8,742
Current	73,957	81,751
Total Loans and Leases Held for Investment	79,887	90,493
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	167	87
60-89 Days Past Due	56	276
90 Days or more Past Due	713	161
Total Past Due	936	524
Current	35,996	36,795
Total Loans and Leases Held for Investment	36,932	37,319
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	409	1,370
60-89 Days Past Due	604	0
90 Days or more Past Due	60	617
Total Past Due	1,073	1,987
Current	165,777	147,177
Total Loans and Leases Held for Investment	166,850	149,164
Recorded Investment 90 Days or more Past Due and Accruing Interest	0	0
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	348	278
60-89 Days Past Due	0	97
90 Days or more Past Due	215	100
Total Past Due	563	475
Current	107,687	94,870
Total Loans and Leases Held for Investment	108,250	95,345
Recorded Investment 90 Days or more Past Due and Accruing Interest	31	23
Loans to Individuals [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	365	445
60-89 Days Past Due	65	193
90 Days or more Past Due	365	319
Total Past Due	795	957
Current	29,146	39,043
Total Loans and Leases Held for Investment	29,941	40,000
Recorded Investment 90 Days or more Past Due and Accruing Interest	365	319
Lease Financings [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,610	2,182
60-89 Days Past Due	406	455
90 Days or more Past Due	435	389
Total Past Due	2,451	3,026
Current	116,009	102,968
Total Loans and Leases Held for Investment	118,460	105,994
Recorded Investment 90 Days or more Past Due and Accruing Interest	$55	$59

Loans_and_Leases_NonPerforming

Loans and Leases - Non-Performing Loans and Leases (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	$17,337,000	$23,235,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	5,469,000	7,943,000
Loans and Leases 90 Days or more Past Due and Accruing Interest	451,000	413,000
Total Non- Performing Loans and Leases	23,257,000	31,591,000
Nonaccrual Troubled Debt Restructured Loans And Lease Modifications	3,100,000	1,600,000
Commercial, Financial and Agricultural [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,002,000	4,253,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	2,851,000	1,329,000
Loans and Leases 90 Days or more Past Due and Accruing Interest	0	12,000
Total Non- Performing Loans and Leases	7,853,000	5,594,000
Real Estate-Commercial [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	4,413,000	8,091,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	2,618,000	4,271,000
Loans and Leases 90 Days or more Past Due and Accruing Interest	0	0
Total Non- Performing Loans and Leases	7,031,000	12,362,000
Real Estate-Construction [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	5,931,000	9,159,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	2,307,000
Loans and Leases 90 Days or more Past Due and Accruing Interest	0	0
Total Non- Performing Loans and Leases	5,931,000	11,466,000
Real Estate-Residential Secured for Business Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	915,000	224,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	0
Loans and Leases 90 Days or more Past Due and Accruing Interest	0	0
Total Non- Performing Loans and Leases	915,000	224,000
Real Estate-Residential Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	512,000	1,101,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	0
Loans and Leases 90 Days or more Past Due and Accruing Interest	0	0
Total Non- Performing Loans and Leases	512,000	1,101,000
Real Estate-Home Equity Secured for Personal Purpose [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	184,000	77,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	0
Loans and Leases 90 Days or more Past Due and Accruing Interest	31,000	23,000
Total Non- Performing Loans and Leases	215,000	100,000
Loans to Individuals [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	0	0
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	36,000
Loans and Leases 90 Days or more Past Due and Accruing Interest	365,000	319,000
Total Non- Performing Loans and Leases	365,000	355,000
Lease Financings [Member]
Non-Performing Loans and Leases [Line Items]
Nonaccrual Loans and Leases	380,000	330,000
Accruing Troubled Debt Restructured Loans and Lease Modifications	0	0
Loans and Leases 90 Days or more Past Due and Accruing Interest	55,000	59,000
Total Non- Performing Loans and Leases	$435,000	$389,000

Loans_and_Leases_Additional_In

Loans and Leases - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Measure taken to reduce the risk of difference in actual value and residual value of the leased assets at maturity	The Corporation greatly reduces this risk primarily by using $1.00 buyout leases, in which the entire cost of the leased equipment is included in the contractual payments, leaving no residual payment at the end of the lease terms.
Other accruing impaired loans	$33,800,000	$27,500,000
Specific reserves for other accruing impaired loans	476,000	1,600,000
Maximum modification period on short-term basis	up to one year
Restructured loan past due period	less than ninety days past due
Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Amount of loan relationship with risk ratings of grade 1-5 reviewed quarterly	2,500,000
Amount of loan relationship with risk ratings of grade 1-5 reviewed annually	500,000
Amount of loan relationship due for review after 60 or more past due days	500,000
Aging period due of reviewing loans rated 1 through 6	60 days
Amount of loan relationship with risk ratings of grade six reviewed quarterly	2,000,000
Amount of loan relationship with risk ratings of grade six reviewed annually	500,000
Loan-to-value ratio for residential mortgage loans with private mortgage insurance	80.00%
Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Amount of loan relationship with risk ratings of grade 1-5 reviewed annually	2,500,000
Amount of loan relationship due for review after 60 or more past due days	500,000
Amount of loan relationship with risk ratings of grade six reviewed annually	$2,000,000
Loan-to-value ratio for residential mortgage loans without private mortgage insurance	80.00%
Combined loan-to-value ratio for home equity loans without private mortgage insurance	80.00%
Combined loan-to-value ratio for home equity loans without private mortgage insurance for corporations strongest profile borrower	85.00%

Loans_and_Leases_Credit_Qualit

Loans and Leases - Credit Quality Indicators (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	$1,626,625	$1,541,484
Grade: 1. Cash secured/ 2. Fully secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	5,510	8,459
Grade: 3. Strong [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	26,414	18,866
Grade: 4. Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	63,588	54,169
Grade: 5. Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	783,790	716,422
Grade: 6. Pre-watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	199,462	219,350
Grade: 7. Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	25,975	31,381
Grade: 8. Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	98,385	101,941
Grade: 9. Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	393
Grade: 10. Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Internally Assigned Grades [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	1,203,124	1,150,981
Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	421,974	388,558
Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	1,527	1,945
Performing and Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	423,501	390,503
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	457,827	422,816
Commercial, Financial and Agricultural [Member] | Grade: 1. Cash secured/ 2. Fully secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	4,248	4,763
Commercial, Financial and Agricultural [Member] | Grade: 3. Strong [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	14,013	6,051
Commercial, Financial and Agricultural [Member] | Grade: 4. Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	23,931	34,650
Commercial, Financial and Agricultural [Member] | Grade: 5. Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	301,425	251,203
Commercial, Financial and Agricultural [Member] | Grade: 6. Pre-watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	65,993	84,201
Commercial, Financial and Agricultural [Member] | Grade: 7. Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	7,166	10,095
Commercial, Financial and Agricultural [Member] | Grade: 8. Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	41,051	31,508
Commercial, Financial and Agricultural [Member] | Grade: 9. Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	345
Commercial, Financial and Agricultural [Member] | Grade: 10. Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Commercial, Financial and Agricultural [Member] | Internally Assigned Grades [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	457,827	422,816
Real Estate-Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	628,478	600,353
Real Estate-Commercial [Member] | Grade: 1. Cash secured/ 2. Fully secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	2,014
Real Estate-Commercial [Member] | Grade: 3. Strong [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	8,504	8,515
Real Estate-Commercial [Member] | Grade: 4. Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	30,587	17,758
Real Estate-Commercial [Member] | Grade: 5. Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	402,719	384,061
Real Estate-Commercial [Member] | Grade: 6. Pre-watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	123,129	113,181
Real Estate-Commercial [Member] | Grade: 7. Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	17,505	19,445
Real Estate-Commercial [Member] | Grade: 8. Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	46,034	55,331
Real Estate-Commercial [Member] | Grade: 9. Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	48
Real Estate-Commercial [Member] | Grade: 10. Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Commercial [Member] | Internally Assigned Grades [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	628,478	600,353
Real Estate-Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	79,887	90,493
Real Estate-Construction [Member] | Grade: 1. Cash secured/ 2. Fully secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	1,262	1,682
Real Estate-Construction [Member] | Grade: 3. Strong [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	3,897	4,300
Real Estate-Construction [Member] | Grade: 4. Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	8,731	1,500
Real Estate-Construction [Member] | Grade: 5. Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	55,111	54,464
Real Estate-Construction [Member] | Grade: 6. Pre-watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	4,956	16,084
Real Estate-Construction [Member] | Grade: 7. Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Construction [Member] | Grade: 8. Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	5,930	12,463
Real Estate-Construction [Member] | Grade: 9. Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Construction [Member] | Grade: 10. Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Construction [Member] | Internally Assigned Grades [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	79,887	90,493
Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	36,932	37,319
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 1. Cash secured/ 2. Fully secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 3. Strong [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 4. Satisfactory [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	339	261
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 5. Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	24,535	26,694
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 6. Pre-watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	5,384	5,884
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 7. Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	1,304	1,841
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 8. Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	5,370	2,639
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 9. Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Residential Secured for Business Purpose [Member] | Grade: 10. Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	0	0
Real Estate-Residential Secured for Business Purpose [Member] | Internally Assigned Grades [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	36,932	37,319
Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	166,850	149,164
Real Estate-Residential Secured for Personal Purpose [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	166,338	148,063
Real Estate-Residential Secured for Personal Purpose [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	512	1,101
Real Estate-Residential Secured for Personal Purpose [Member] | Performing and Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	166,850	149,164
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	108,250	95,345
Real Estate-Home Equity Secured for Personal Purpose [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	108,035	95,245
Real Estate-Home Equity Secured for Personal Purpose [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	215	100
Real Estate-Home Equity Secured for Personal Purpose [Member] | Performing and Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	108,250	95,345
Loans to Individuals [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	29,941	40,000
Loans to Individuals [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	29,576	39,645
Loans to Individuals [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	365	355
Loans to Individuals [Member] | Performing and Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	29,941	40,000
Lease Financings [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	118,460	105,994
Lease Financings [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	118,025	105,605
Lease Financings [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	435	389
Lease Financings [Member] | Performing and Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and leases held for investment	$118,460	$105,994

Loans_and_Leases_Reserve_for_L

Loans and Leases - Reserve for Loan and Lease Losses Roll Forward (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$24,494,000				$24,746,000	$24,494,000	$24,746,000	$29,870,000
Charge-offs									-8,850,000	-13,619,000	-16,735,000
Recoveries									1,411,000	2,139,000	1,576,000
Provision (recovery of provision)	648,000	233,000	1,251,000	1,475,000	1,614,000	4,094,000	3,446,000	2,074,000	3,607,000	11,228,000	10,035,000
Ending balance	20,662,000				24,494,000				20,662,000	24,494,000	24,746,000
Amount of Loans Charged Off Prior to Being Transferred to Loans Held for Sale											1,300,000
Commercial, Financial and Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				9,789,000				11,594,000	9,789,000	11,594,000	11,262,000
Charge-offs									-2,834,000	-3,213,000	-9,974,000
Recoveries									247,000	320,000	484,000
Provision (recovery of provision)									-282,000	1,088,000	9,822,000
Ending balance	6,920,000				9,789,000				6,920,000	9,789,000	11,594,000
Real Estate-Commercial and Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				8,780,000				7,507,000	8,780,000	7,507,000	13,317,000
Charge-offs									-4,363,000	-8,667,000	-4,803,000
Recoveries									524,000	1,104,000	334,000
Provision (recovery of provision)									4,002,000	8,836,000	-1,341,000
Ending balance	8,943,000				8,780,000				8,943,000	8,780,000	7,507,000
Real Estate-Residential Secured for Business Purpose [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				1,062,000				639,000	1,062,000	639,000	823,000
Charge-offs									-140,000	-112,000	0
Recoveries									60,000	13,000	60,000
Provision (recovery of provision)									-219,000	522,000	-244,000
Ending balance	763,000				1,062,000				763,000	1,062,000	639,000
Real Estate-Residential and Home Equity Secured for Personal Purpose [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				1,284,000				980,000	1,284,000	980,000	735,000
Charge-offs									-141,000	-195,000	-156,000
Recoveries									34,000	13,000	7,000
Provision (recovery of provision)									-53,000	486,000	394,000
Ending balance	1,124,000				1,284,000				1,124,000	1,284,000	980,000
Loans to Individuals [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				694,000				679,000	694,000	679,000	730,000
Charge-offs									-796,000	-641,000	-578,000
Recoveries									265,000	174,000	130,000
Provision (recovery of provision)									197,000	482,000	397,000
Ending balance	360,000				694,000				360,000	694,000	679,000
Lease Financings [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				1,285,000				1,326,000	1,285,000	1,326,000	1,344,000
Charge-offs									-576,000	-791,000	-1,224,000
Recoveries									281,000	515,000	561,000
Provision (recovery of provision)									-5,000	235,000	645,000
Ending balance	985,000				1,285,000				985,000	1,285,000	1,326,000
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				1,600,000				2,021,000	1,600,000	2,021,000	1,659,000
Provision (recovery of provision)									-33,000	-421,000	362,000
Ending balance	$1,567,000				$1,600,000				$1,567,000	$1,600,000	$2,021,000

Loans_and_Leases_Reserve_for_L1

Loans and Leases - Reserve for Loan and Lease Losses and Recorded Investment in Loans and Leases (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	$998	$2,963
Ending balance: collectively evaluated for impairment	19,664	21,531
Total ending balance	20,662	24,494	24,746	29,870
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	56,191	58,333
Ending balance: collectively evaluated for impairment	1,570,434	1,483,151
Total Loans and Leases Held for Investment	1,626,625	1,541,484
Commercial, Financial and Agricultural [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	920	2,398
Ending balance: collectively evaluated for impairment	6,000	7,391
Total ending balance	6,920	9,789	11,594	11,262
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	16,561	14,105
Ending balance: collectively evaluated for impairment	441,266	408,711
Total Loans and Leases Held for Investment	457,827	422,816
Real Estate-Commercial and Construction [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	78	0
Ending balance: collectively evaluated for impairment	8,865	8,780
Total ending balance	8,943	8,780	7,507	13,317
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	35,926	41,240
Ending balance: collectively evaluated for impairment	672,439	649,606
Total Loans and Leases Held for Investment	708,365	690,846
Real Estate-Residential Secured for Business Purpose [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	0	501
Ending balance: collectively evaluated for impairment	763	561
Total ending balance	763	1,062	639	823
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	3,008	1,774
Ending balance: collectively evaluated for impairment	33,924	35,545
Total Loans and Leases Held for Investment	36,932	37,319
Real Estate-Residential and Home Equity Secured for Personal Purpose [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	0	64
Ending balance: collectively evaluated for impairment	1,124	1,220
Total ending balance	1,124	1,284	980	735
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	696	1,178
Ending balance: collectively evaluated for impairment	274,404	243,331
Total Loans and Leases Held for Investment	275,100	244,509
Loans to Individuals [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	360	694
Total ending balance	360	694	679	730
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	0	36
Ending balance: collectively evaluated for impairment	29,941	39,964
Total Loans and Leases Held for Investment	29,941	40,000
Lease Financings [Member]
Reserve for loan and lease losses:
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	985	1,285
Total ending balance	985	1,285	1,326	1,344
Loans and leases held for investment:
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	118,460	105,994
Total Loans and Leases Held for Investment	118,460	105,994
Unallocated [Member]
Reserve for loan and lease losses:
Ending balance: collectively evaluated for impairment	1,567	1,600
Total ending balance	$1,567	$1,600	$2,021	$1,659

Loans_and_Leases_Impaired_Loan

Loans and Leases - Impaired Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	$52,042	$52,598
Impaired loans with an allowance recorded, Recorded Investment	4,149	5,735
Impaired loans with no related allowance, Unpaid Principal Balance	54,109	62,486
Impaired loans with an allowance recorded, Unpaid Principal Balance	4,151	5,798
Total impaired loans, Recorded Investment	56,191	58,333
Total impaired loans, Unpaid Principal Balance	58,260	68,284
Total impaired loans, Related Allowance	998	2,963
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	12,628	10,890
Impaired loans with an allowance recorded, Recorded Investment	3,933	3,215
Impaired loans with no related allowance, Unpaid Principal Balance	13,050	11,749
Impaired loans with an allowance recorded, Unpaid Principal Balance	3,935	3,272
Total impaired loans, Recorded Investment	16,561	14,105
Total impaired loans, Unpaid Principal Balance	16,985	15,021
Total impaired loans, Related Allowance	920	2,398
Real Estate-Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	29,779	28,883
Impaired loans with an allowance recorded, Recorded Investment	216	0
Impaired loans with no related allowance, Unpaid Principal Balance	30,810	35,700
Impaired loans with an allowance recorded, Unpaid Principal Balance	216	0
Total impaired loans, Recorded Investment	29,995	28,883
Total impaired loans, Unpaid Principal Balance	31,026	35,700
Total impaired loans, Related Allowance	78	0
Real Estate-Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	5,931	12,357
Impaired loans with no related allowance, Unpaid Principal Balance	6,474	14,540
Total impaired loans, Recorded Investment	5,931	12,357
Total impaired loans, Unpaid Principal Balance	6,474	14,540
Total impaired loans, Related Allowance	0	0
Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	3,008	224
Impaired loans with an allowance recorded, Recorded Investment	0	1,550
Impaired loans with no related allowance, Unpaid Principal Balance	3,044	235
Impaired loans with an allowance recorded, Unpaid Principal Balance	0	1,550
Total impaired loans, Recorded Investment	3,008	1,774
Total impaired loans, Unpaid Principal Balance	3,044	1,785
Total impaired loans, Related Allowance	0	501
Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	512	131
Impaired loans with an allowance recorded, Recorded Investment	0	970
Impaired loans with no related allowance, Unpaid Principal Balance	547	131
Impaired loans with an allowance recorded, Unpaid Principal Balance	0	976
Total impaired loans, Recorded Investment	512	1,101
Total impaired loans, Unpaid Principal Balance	547	1,107
Total impaired loans, Related Allowance	0	64
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	184	77
Impaired loans with no related allowance, Unpaid Principal Balance	184	77
Total impaired loans, Recorded Investment	184	77
Total impaired loans, Unpaid Principal Balance	184	77
Total impaired loans, Related Allowance	0	0
Loans to Individuals [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance, Recorded Investment	0	36
Impaired loans with no related allowance, Unpaid Principal Balance	0	54
Total impaired loans, Recorded Investment	0	36
Total impaired loans, Unpaid Principal Balance	0	54
Total impaired loans, Related Allowance	$0	$0

Loans_and_Leases_Tables_for_Im

Loans and Leases - Tables for Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$55,761	$48,241	$43,242
Interest Income Recognized	1,863	1,156	552
Additional Interest Income That Would Have Been Recognized Under Original Terms	1,164	1,652	2,161
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	15,334	6,412	5,189
Interest Income Recognized	540	172	82
Additional Interest Income That Would Have Been Recognized Under Original Terms	258	200	288
Real Estate-Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	26,662	25,728	20,756
Interest Income Recognized	1,143	837	348
Additional Interest Income That Would Have Been Recognized Under Original Terms	323	717	1,086
Real Estate-Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	10,412	14,621	16,207
Interest Income Recognized	103	124	117
Additional Interest Income That Would Have Been Recognized Under Original Terms	463	680	763
Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,524	672	156
Interest Income Recognized	77	19	0
Additional Interest Income That Would Have Been Recognized Under Original Terms	61	10	7
Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	719	760	293
Interest Income Recognized	0	0	0
Additional Interest Income That Would Have Been Recognized Under Original Terms	49	45	17
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	106	8	2
Interest Income Recognized	0	0	0
Additional Interest Income That Would Have Been Recognized Under Original Terms	10	0	0
Loans to Individuals [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4	40	47
Interest Income Recognized	0	4	5
Additional Interest Income That Would Have Been Recognized Under Original Terms	$0	$0	$0

Loans_and_Leases_Narrative_for

Loans and Leases - Narrative for Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Interest income recognized on a cash basis for nonaccrual loans	$23	$6	$67
Interest income recognized on accrual method for accruing impaired loans	1,800	1,200	485
Reserve for uncollected interest	1	21
Off-balance Sheet Risks, Amount, Liability	$338	$319

Loans_and_Leases_Troubled_Debt

Loans and Leases - Troubled Debt Restructured Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	Loans	Loans
Accrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	7	6
Pre- Restructuring Outstanding Recorded Investment	$2,824	$3,053
Post- Restructuring Outstanding Recorded Investment	2,824	3,053
Related Allowance	507	0
Accrual Troubled Debt Restructuring Loans [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	6	2
Pre- Restructuring Outstanding Recorded Investment	1,824	1,025
Post- Restructuring Outstanding Recorded Investment	1,824	1,025
Related Allowance	507	0
Accrual Troubled Debt Restructuring Loans [Member] | Real Estate-Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1	3
Pre- Restructuring Outstanding Recorded Investment	1,000	1,569
Post- Restructuring Outstanding Recorded Investment	1,000	1,569
Related Allowance	0	0
Accrual Troubled Debt Restructuring Loans [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	1
Pre- Restructuring Outstanding Recorded Investment	0	459
Post- Restructuring Outstanding Recorded Investment	0	459
Related Allowance	0	0
Nonaccrual Troubled Debt Restructured Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	3	0
Pre- Restructuring Outstanding Recorded Investment	738	0
Post- Restructuring Outstanding Recorded Investment	738	0
Related Allowance	0	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Real Estate-Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	1	0
Pre- Restructuring Outstanding Recorded Investment	50	0
Post- Restructuring Outstanding Recorded Investment	50	0
Related Allowance	0	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2	0
Pre- Restructuring Outstanding Recorded Investment	688	0
Post- Restructuring Outstanding Recorded Investment	688	0
Related Allowance	$0	$0

Loans_and_Leases_Concessions_G

Loans and Leases - Concessions Granted on Accruing and Nonaccrual Loans Restructured (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	Loans	Loans
Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	7	6
Amount	$2,824	$3,053
Accrual Troubled Debt Restructuring Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1
Amount	0	1,000
Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1
Amount	0	756
Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	6	4
Amount	2,699	1,297
Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0
Amount	125	0
Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	3	0
Amount	738	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	2	0
Amount	105	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0
Amount	633	0
Nonaccrual Troubled Debt Restructured Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	6	2
Amount	1,824	1,025
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1
Amount	0	1,000
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	5	1
Amount	1,699	25
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0
Amount	125	0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	3
Amount	1,000	1,569
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1
Amount	0	756
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	2
Amount	1,000	813
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0
Amount	0	0
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0
Amount	50
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1
Amount	50
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1
Amount		459
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		0
Amount		0
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		0
Amount		0
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		0
Amount		0
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		1
Amount		459
Commercial Real Estate Construction Financing Receivable [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		0
Amount		0
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	2	0
Amount	688
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Only Term Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	0
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1
Amount	55
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1
Amount	633
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0
Amount	$0

Loans_and_Leases_Accruing_and_

Loans and Leases - Accruing and Nonaccrual Troubled Debt Restructured Loans with Payment Defaults (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	Loans	Loans
Accrual Troubled Debt Restructuring Loans [Member]
Accruing and nonaccrual troubled debt restructured loans with payment default
Number of Loans	0	1
Recorded Investment	$0	$1,000
Accrual Troubled Debt Restructuring Loans [Member] | Commercial, Financial and Agricultural [Member]
Accruing and nonaccrual troubled debt restructured loans with payment default
Number of Loans	0	1
Recorded Investment	0	1,000
Nonaccrual Troubled Debt Restructured Loans [Member]
Accruing and nonaccrual troubled debt restructured loans with payment default
Number of Loans	0	0
Recorded Investment	$0	$0

Premises_and_Equipment_Compone

Premises and Equipment - Components of Premises and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Total cost	$72,227	$67,507
Less: accumulated depreciation	-35,218	-33,378
Net book value	37,009	34,129
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	10,576	9,987
Premises and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	37,348	35,225
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$24,303	$22,295

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 27, 2014	Jul. 01, 2014
Goodwill And Other Intangible Assets [Line Items]
Amortization of Intangible Assets	$3,300,000	$2,300,000	$2,400,000
Goodwill	67,717,000	57,517,000	56,238,000
Additional goodwill	10,200,000	1,279,000
Goodwill impairment	0	0	0
Material impairment to identifiable intangibles	0	0	0
Aggregate fair value of mortgage servicing rights	6,900,000	7,200,000
Minimum [Member]
Goodwill And Other Intangible Assets [Line Items]
Range of discount rates used for valuation of mortgage servicing rights	10.00%	5.00%
Maximum [Member]
Goodwill And Other Intangible Assets [Line Items]
Range of discount rates used for valuation of mortgage servicing rights		10.00%
Girard Partners [Member]
Goodwill And Other Intangible Assets [Line Items]
Additional goodwill				6,800,000
Sterner Insurance Associates Inc [Member]
Goodwill And Other Intangible Assets [Line Items]
Additional goodwill					3,400,000
Customer Related Intangibles [Member]
Goodwill And Other Intangible Assets [Line Items]
Impairment on customer related intangibles	31,000	83,000	31,000
Customer-Related Intangible Assets [Member] | Girard Partners [Member]
Goodwill And Other Intangible Assets [Line Items]
Customer related intangibles				4,300,000
Customer-Related Intangible Assets [Member] | Sterner Insurance Associates Inc [Member]
Goodwill And Other Intangible Assets [Line Items]
Customer related intangibles					$1,600,000

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning Balance	$57,517	$56,238
Goodwill, Acquired During Period	10,200	1,279
Goodwill, Ending Balance	67,717	57,517
Banking [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	35,058	35,058
Goodwill, Acquired During Period	0	0
Goodwill, Ending Balance	35,058	35,058
Wealth Management [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	8,625	8,625
Goodwill, Acquired During Period	6,809	0
Goodwill, Ending Balance	15,434	8,625
Insurance [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	13,834	12,555
Goodwill, Acquired During Period	3,391	1,279
Goodwill, Ending Balance	$17,225	$13,834

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Components of Intangible Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$23,956	$18,478
Accumulated Amortization and Fair Value Adjustments	11,776	10,300
Net Carrying Amount	12,180	8,178
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,397	7,513
Accumulated Amortization and Fair Value Adjustments	6,726	4,854
Net Carrying Amount	6,671	2,659
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,559	10,965
Accumulated Amortization and Fair Value Adjustments	5,050	5,446
Net Carrying Amount	$5,509	$5,519

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets - Estimated Aggregate Amortization Expense (Detail) (Customer Related Intangibles [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
2015	$1,730
2016	1,411
2017	1,162
2018	868
2019	622
Thereafter	$878

Goodwill_and_Other_Intangible_6

Goodwill and Other Intangible Assets - Changes in Mortgage Servicing Rights (Detail) (Mortgage Servicing Rights [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Servicing Rights [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning of period	$5,519	$4,152	$2,739
Servicing rights capitalized	1,118	2,485	2,727
Amortization of servicing rights	-1,378	-1,365	-1,610
Changes in valuation allowance	250	247	296
End of period	5,509	5,519	4,152
Mortgage loans serviced for others	$796,835	$751,891	$604,801

Goodwill_and_Other_Intangible_7

Goodwill and Other Intangible Assets - Activity in Valuation Allowance for Mortgage Servicing Rights (Detail) (Mortgage Servicing Rights [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Servicing Rights [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance, beginning of period	($250)	($497)	($793)
Additions	0	0	0
Reductions	250	247	296
Direct write-downs	0	0	0
Valuation allowance, end of period	$0	($250)	($497)

Goodwill_and_Other_Intangible_8

Goodwill and Other Intangible Assets - Estimated Amortization Expense of Mortgage Servicing Rights (Detail) (Mortgage Servicing Rights [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
2015	$923
2016	787
2017	662
2018	556
2019	466
Thereafter	$2,115

Accrued_Interest_Receivable_an2

Accrued Interest Receivable and Other Assets - Details of Accrued Interest Receivable and Other Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Interest Receivable and Other Assets [Abstract]
Other real estate owned	$955	$1,650
Accrued interest receivable	6,086	6,262
Accrued income and other receivables	2,655	3,539
Fair market value of derivative financial instruments	788	346
Other prepaid expenses	13,963	9,624
Federal Reserve Bank stock, Federal Home Loan Bank stock and other not readily marketable equity securities	4,487	6,632
Net federal deferred tax assets	10,756	12,335
Total accrued interest and other assets	$39,690	$40,388

Accrued_Interest_Receivable_an3

Accrued Interest Receivable and Other Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Receivable and Other Assets [Abstract]
Federal Reserve Bank stock	$3,300,000	$3,300,000
FHLB Stock	1,100,000	3,300,000
Other-than-temporary impairment of equity securities	$0	$0	$13,000

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Proceeds and Excess Tax Benefit from Share-based Compensation	$0	$1,000
Unrecognized Tax Benefits	0
Deferred Tax Assets Reversed	2,000	28,000
Accrued Interest Or Penalties	0	0
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards	$25,000,000
Operating Loss Carryforwards, Expiration Date	31-Dec-18
Minimum [Member]
Income Tax Contingency [Line Items]
Open tax years	2011
Maximum [Member]
Income Tax Contingency [Line Items]
Open tax years	2013

Income_Taxes_Provision_for_Fed

Income Taxes - Provision for Federal and State Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal									$2,509	$4,172	$2,753
State									777	591	258
Deferred:
Federal									4,027	922	2,397
State									135	11	143
Provision for federal and state income taxes, total	$1,632	$2,264	$1,547	$2,005	$1,049	$1,400	$1,537	$1,710	$7,448	$5,696	$5,551

Income_Taxes_Income_Tax_Provis

Income Taxes - Income Tax Provision Differences from Expected Statutory Provision (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Expected provision at statutory rate	35.00%	35.00%	35.00%
Difference resulting from:
Tax exempt interest income	-11.20%	-11.70%	-12.10%
Increase in value of bank owned life insurance assets	-1.90%	-3.90%	-3.50%
Other, including state income taxes, valuation allowances and rate differentials	3.20%	1.80%	1.60%
Provision for income taxes - effective income tax rate	25.10%	21.20%	21.00%

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Loan and lease loss	$7,358	$8,785
Deferred compensation	2,492	2,675
Actuarial adjustments on retirement benefits	8,625	4,568
Interest on nonaccrual loans	0	2,268
State net operating losses	1,621	1,743
Other-than-temporary impairments on equity securities	577	759
Alternative minimum tax credits	1,067	1,367
Net unrealized holding losses on securities available-for-sale	0	792
Other	1,125	280
Gross deferred tax assets	22,865	23,237
Valuation allowance	-1,461	-1,630
Total deferred tax assets, net of valuation allowance	21,404	21,607
Deferred tax liabilities:
Market discount	2,224	1,722
Retirement plans	5,700	5,602
Intangible assets	2,308	2,212
Net unrealized holding gains on securities available-for-sale and swaps	837	0
Total deferred tax liabilities	11,069	9,536
Net deferred tax assets	$10,335	$12,071

Retirement_Plans_and_Other_Pos2

Retirement Plans and Other Postretirement Benefits - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Employee hire date no longer eligible for noncontributory retirement plan	8-Dec-09
Defined Benefit Plan, Expected Long-Term Rate of Return	7.50%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Maturity Period Of Fixed Income Investments	1 year
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Maturity Period Of Fixed Income Investments		10 years
Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	60.00%
Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	40.00%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	$44	$661	$531
Assumed discount rate	4.90%	4.00%
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	4.90%	4.00%
Expected employer contributions for next fiscal year	166
Defined Benefit Plan, Expected Long-Term Rate of Return	7.50%	7.50%
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	4.90%	4.00%
Expected employer contributions for next fiscal year	113
Defined Benefit Plan, Expected Long-Term Rate of Return	0.00%	0.00%
Deferred Salary Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$836	$765	$667

Retirement_Plans_and_Other_Pos3

Retirement Plans and Other Postretirement Benefits - Summary of Retirement Plans and Other Postretirement Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in plan assets:
Fair value of plan assets at end of year	$41,437	$40,547
Retirement Plans [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	39,593	42,879
Service cost	528	621	622
Interest cost	1,900	1,712	1,726
Actuarial loss (gain)	11,462	-3,818
Benefits paid	-2,093	-1,801
Benefit obligation at end of year	51,390	39,593	42,879
Change in plan assets:
Fair value of plan assets at beginning of year	40,547	34,420
Actual return on plan assets	2,821	5,764
Benefits paid	-2,093	-1,801
Employer contribution and non-qualified benefit payments	162	2,164
Fair value of plan assets at end of year	41,437	40,547	34,420
Funded status	-9,953	954
Unrecognized net actuarial loss	25,010	14,138
Unrecognized prior service costs	-1,309	-1,590
Net amount recognized	13,748	13,502
Other Post Retirement Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	2,330	2,518
Service cost	75	86	82
Interest cost	128	118	116
Actuarial loss (gain)	455	-313
Benefits paid	-92	-79
Benefit obligation at end of year	2,896	2,330	2,518
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Benefits paid	-92	-79
Employer contribution and non-qualified benefit payments	92	79
Fair value of plan assets at end of year	0	0	0
Funded status	-2,896	-2,330
Unrecognized net actuarial loss	950	510
Unrecognized prior service costs	0	-7
Net amount recognized	($1,946)	($1,827)

Retirement_Plans_and_Other_Pos4

Retirement Plans and Other Postretirement Benefits - Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	$48,928	$37,912
Accumulated benefit obligation	45,003	36,683
Fair value of plan assets	$41,437	$40,547

Retirement_Plans_and_Other_Pos5

Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Income) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$528	$621	$622
Interest cost	1,900	1,712	1,726
Expected return on plan assets	-2,929	-2,527	-2,254
Amortization of net actuarial loss	649	1,259	1,147
Accretion of prior service cost	-281	-235	-235
Net periodic benefit (income) cost	-133	830	1,006
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	75	86	82
Interest cost	128	118	116
Expected return on plan assets	0	0	0
Amortization of net actuarial loss	17	23	23
Accretion of prior service cost	-7	-20	-20
Net periodic benefit (income) cost	$213	$207	$201

Retirement_Plans_and_Other_Pos6

Retirement Plans and Other Postretirement Benefits - Expected Amortization Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial loss	$1,308
Accretion of prior service cost	-280
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial loss	54
Accretion of prior service cost	$0

Retirement_Plans_and_Other_Pos7

Retirement Plans and Other Postretirement Benefits - Summary of Benefit Payments Expected to be Paid (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$2,390
2016	2,429
2017	2,463
2018	2,514
2019	2,572
Years 2020-2024	13,533
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	113
2016	116
2017	121
2018	126
2019	130
Years 2020-2024	$700

Retirement_Plans_and_Other_Pos8

Retirement Plans and Other Postretirement Benefits - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Assumed long-term rate of investment return	7.50%
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	3.90%	4.90%
Assumed salary increase rate	3.00%	3.00%
Assumed discount rate	4.90%	4.00%
Assumed long-term rate of investment return	7.50%	7.50%
Assumed salary increase rate	3.00%	3.00%
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	3.90%	4.90%
Assumed salary increase rate	0.00%	0.00%
Assumed discount rate	4.90%	4.00%
Assumed long-term rate of investment return	0.00%	0.00%
Assumed salary increase rate	0.00%	0.00%

Retirement_Plans_and_Other_Pos9

Retirement Plans and Other Postretirement Benefits - Summary of Assumed Health Care Cost Trend Rates (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumed for next year	6.00%	6.50%	6.50%
Rate to which the cost trend rate is assumed to decline	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate rate	2016	2015	2014

Recovered_Sheet1

Retirement Plans and Other Postretirement Benefits - Effect of One Percentage-Point Change in Assumed Health Care Cost Trend Rates (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect on total of service and interest cost components, Increase	$10
Effect on postretirement benefit obligation, Increase	114
Effect on total of service and interest cost components, Decrease	-10
Effect on postretirement benefit obligation, Decrease	($101)

Recovered_Sheet2

Retirement Plans and Other Postretirement Benefits - Summary of Corporation's Pension Plan Asset Allocation (Detail)	Dec. 31, 2014	Dec. 31, 2013
Summary of corporation's pension plan asset allocation
Assets Category, Total	100.00%	100.00%
Equity Securities [Member]
Summary of corporation's pension plan asset allocation
Assets Category, Total	65.00%	64.00%
Debt Securities [Member]
Summary of corporation's pension plan asset allocation
Assets Category, Total	34.00%	35.00%
Other [Member]
Summary of corporation's pension plan asset allocation
Assets Category, Total	1.00%	1.00%

Recovered_Sheet3

Retirement Plans and Other Postretirement Benefits - Major Categories of Assets in Corporation's Pension Plan (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	$41,437	$40,547
Mutual Fund [Member] | Level 1 [Member] | U.S. Large Cap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	17,482	16,710
Mutual Fund [Member] | Level 1 [Member] | U.S. Mid Cap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	2,218	2,169
Mutual Fund [Member] | Level 1 [Member] | U.S. Small Cap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	2,290	2,341
Mutual Fund [Member] | Level 1 [Member] | International [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	4,961	4,634
Mutual Fund [Member] | Level 1 [Member] | Income [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	972	686
Short-term Investments [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	585	650
U.S. Government Obligations [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	3,273	3,790
Corporate Bonds [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	5,621	5,228
Certificates of Deposit [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fair value of plan assets	$4,035	$4,339

Recovered_Sheet4

Retirement Plans and Other Postretirement Benefits - Reconciliation of Beginning and Ending Balances for Measurements in Hierarchy Level 3 (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Beginning Balance	$4,339	$4,503
Total Unrealized (Losses) or Gains	0	0
Total Realized Gains or (Losses)	0	0
Purchases	595	280
Maturities/ Redemptions	-899	-444
Ending Balance	4,035	4,339
Certificates of Deposit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Beginning Balance	4,339	4,503
Total Unrealized (Losses) or Gains	0	0
Total Realized Gains or (Losses)	0	0
Purchases	595	280
Maturities/ Redemptions	-899	-444
Ending Balance	$4,035	$4,339

StockBased_Incentive_Plan_Addi

Stock-Based Incentive Plan - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share awards authorized for issuance	2,000,000
Purchase price of common shares as a percentage of fair market value	100.00%
Contractual term	10 years
Period optioned shares become 100% exercisable	2 years
Percent of optioned shares become exercisable each year from three to five years	33.30%
Options to purchase common stock outstanding	673,216	612,050
Unvested restricted stock awards outstanding under the plan	176,978	185,423
Total intrinsic value of options exercised	$47
Stock options exercised	17,334	0	0
Total unrecognized compensation expense related to nonvested share-based compensation arrangements	$1,500
Unrecognized compensation expense expected to be recognized over weighted average period	2 years 2 months
2013 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards available for future grant	1,831,545
2003 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock awards outstanding under the plan	176,978
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period optioned shares begin to become exercisable	3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period optioned shares begin to become exercisable	10 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common shares as a percentage of fair market value	100.00%
Period optioned shares begin to become exercisable	3 years
Valley Green Bank [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized				473,483

StockBased_Incentive_Plan_Stat

Stock-Based Incentive Plan - Status of Options Granted Under Long-Term Incentive Plan (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Shares Under Option
Shares Under Option, Outstanding, Beginning balance	612,050
Shares Under Option, Granted	114,000
Shares Under Option, Expired	0
Shares Under Option, Forfeited	-35,500
Shares Under Option, Exercised	-17,334	0	0
Share Under Option, Outstanding, Ending balance	673,216	612,050
Shares Under Options, Exercisable at December 31	393,662
Weighted Average Exercise Price Per Share [Abstract]
Weighted Average Exercise Price Per Share, Outstanding, Beginning balance	$19.41
Weighted Average Exercise Price Per Share, Granted	$18.78
Weighted Average Exercise Price Per Share, Expired	$0
Weighted Average Exercise Price Per Share, Forfeited	$17.06
Weighted Average Exercise Price Per Share, Exercised	$17.92
Weighted Average Exercise Price Per Share, Outstanding, Ending balance	$19.46	$19.41
Weighted Average Exercise Price Per Share, Exercisable at December 31, 2014	$21.07
Weighted Average Remaining Contractual Life, Outstanding at December 31, 2014	5 years 2 months
Weighted Average Remaining Contractual Life, Exercisable at December 31, 2014	3 years 1 month
Aggregate Intrinsic Value, Outstanding at December 31, 2014	$1,201
Aggregate Intrinsic Value, Exercisable at December 31, 2014	$351

StockBased_Incentive_Plan_Aggr

Stock-Based Incentive Plan - Aggregated Assumptions Used to Estimate Fair Value of Options Granted (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected option life in years	8 years 2 months	8 years 10 months 24 days	8 years 2 months 12 days
Risk free interest rate	2.51%	1.99%	1.63%
Expected dividend yield	4.26%	4.74%	5.40%
Expected volatility	50.16%	49.30%	50.74%
Fair value of options	$6.53	$5.32	$4.37

StockBased_Incentive_Plan_Summ

Stock-Based Incentive Plan - Summary of Nonvested Restricted Stock Awards (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Share Awards, Beginning balance	185,423
Nonvested Share Awards, Granted	74,304
Nonvested Share Awards, Vested	-39,297
Nonvested Share Awards, Forfeited	-43,452
Nonvested Share awards, Ending balance	176,978
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning balance	$16.40
Weighted Average Grant Date Fair Value, Granted	$18.63
Weighted Average Grant Date Fair Value, Vested	$17.24
Weighted Average Grant Date Fair Value, Forfeited	$16.91
Weighted Average Grant Date Fair Value, Ending balance	$17.02

StockBased_Incentive_Plan_Cert

Stock-Based Incentive Plan - Certain Information Regarding Restricted Stock (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	74,304
Weighted average grant date fair value	$18.63
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	74,304	70,041	71,157
Weighted average grant date fair value	$18.63	$16.76	$15.29
Intrinsic value of awards vested	$735	$505	$625

StockBased_Incentive_Plan_Comp

Stock-Based Incentive Plan - Compensation Expense Related to Stock Incentive Plans Recognized (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation expense:
Total Expense	$1,188	$1,016	$1,303
Tax benefit on nonqualified stock option expense and restricted stock awards	244	162	296
Stock Options [Member]
Stock-based compensation expense:
Total Expense	463	517	408
Restricted Stock Awards [Member]
Stock-based compensation expense:
Total Expense	679	461	859
Employee Stock Purchase Plan [Member]
Stock-based compensation expense:
Total Expense	$46	$38	$36

Time_Deposits_Additional_Infor

Time Deposits - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Aggregate amount of time deposits in denominations of $100 thousand or more	$76,826	$75,900
Interest expense on time deposits $100 thousand or more	$891	$1,000

Time_Deposits_Scheduled_Maturi

Time Deposits - Scheduled Maturities of Time Deposits over $100 Thousand (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Banking and Thrift [Abstract]
Due in 2015	$41,844
Due in 2016	20,140
Due in 2017	9,232
Due in 2018	2,251
Due in 2019	1,967
Thereafter	1,392
Total	$76,826	$75,900

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	31-May-13	14-May-13
Debt Instrument [Line Items]
Maximum borrowing capacity	$518,700,000
Outstanding borrowings with FHLB	0	0
Outstanding short term letters of credit	55,000,000	35,000,000
Maturity date	7-Oct-33
Liquidation amount of trust preferred security	$1,000
Redemption date	7-Jul-13
Settlement date	8-Jul-13
Redemption in securities	619,000
Loss on Trust Preferred Securities hedge	0	-1,866,000	0
Amount of maintained federal fund lines of credit with correspondent banks	82,000,000	82,000,000
Amount of federal fund lines of credit with correspondent banks	0	0
Amount of federal fund line of credit with Federal Reserve Bank of Philadelphia	0	0
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Loss on Trust Preferred Securities hedge				1,900,000
Interest rate swap maturity date	7-Jan-19
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					3.05%
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Aggregate principal balance of capital securities redeemed					20,000,000

Borrowings_Customer_Repurchase

Borrowings - Customer Repurchase Agreements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
Customer repurchase agreements	$41,974	$37,256	$96,282
Weighted average interest rate at year end	0.06%	0.07%	0.07%
Maximum amount outstanding at any month's end	43,266	110,228	117,291
Average amount outstanding during the year	$41,048	$72,211	$106,206
Weighted average interest rate during the year	0.06%	0.06%	0.13%

Earnings_per_Share_Basic_and_D

Earnings per Share - Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic and Diluted [Abstract]
Numerator for basic and diluted earnings per share—income available to common shareholders	$5,190	$6,235	$5,080	$5,726	$4,922	$6,039	$4,830	$5,398	$22,231	$21,189	$20,872
Denominator for basic earnings per share—weighted-average shares outstanding									16,235	16,605	16,761
Effect of dilutive securities—employee stock options and awards									90	70	55
Denominator for diluted earnings per share—adjusted weighted-average shares outstanding									16,325	16,675	16,816
Basic earnings per share	$0.32	$0.38	$0.31	$0.35	$0.30	$0.36	$0.29	$0.32	$1.37	$1.28	$1.25
Diluted earnings per share	$0.32	$0.38	$0.31	$0.35	$0.30	$0.36	$0.29	$0.32	$1.36	$1.27	$1.24
Average anti-dilutive options and awards excluded from computation of diluted earnings per share									499	546	581

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	($9,955)	($6,920)	($6,101)
Net Change	-4,507	-3,035	-819
Ending balance	-14,462	-9,955	-6,920
Net Unrealized Holding (Losses) Gains on Available-for-Sale Investment Securities [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	-1,472	8,344	7,306
Net Change	3,183	-9,816	1,038
Ending balance	1,711	-1,472	8,344
Net Change Related to Derivative Used for Cash Flow Hedge [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	0	-1,241	-932
Net Change	-157	1,241	-309
Ending balance	-157	0	-1,241
Net Change Related to Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance	-8,483	-14,023	-12,475
Net Change	-7,533	5,540	-1,548
Ending balance	($16,016)	($8,483)	($14,023)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss - Amounts Reclassified Out of Each Component of Accumulated Comprehensive (Loss) Income (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain on sales of investment securities									$635	$3,389	$305
Other-than-temporary impairment on equity securities									0	0	-13
Amortization of net loss included in net periodic pension costs									666	1,282	1,170
Accretion of prior service cost included in net periodic pension costs									-288	-255	-255
Income before income taxes	6,822	8,499	6,627	7,731	5,971	7,439	6,367	7,108	29,679	26,885	26,423
Tax (expense) benefit	-1,632	-2,264	-1,547	-2,005	-1,049	-1,400	-1,537	-1,710	-7,448	-5,696	-5,551
Net income	5,190	6,235	5,080	5,726	4,922	6,039	4,830	5,398	22,231	21,189	20,872
Amount Reclassified from Accumulated Other Comprehensive (Loss) Income [Member] | Net Unrealized Holding (Losses) Gains on Available-for-Sale Investment Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain on sales of investment securities									635	3,389	305
Other-than-temporary impairment on equity securities									0	0	-13
Income before income taxes									635	3,389	292
Tax (expense) benefit									-222	-1,186	-102
Net income									413	2,203	190
Amount Reclassified from Accumulated Other Comprehensive (Loss) Income [Member] | Net Change Related to Derivative Used for Cash Flow Hedge [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net loss on interest rate swap									0	-1,866	0
Income before income taxes									0	-1,866	0
Tax (expense) benefit									0	653	0
Net income									0	-1,213	0
Amount Reclassified from Accumulated Other Comprehensive (Loss) Income [Member] | Net Change Related to Defined Benefit Pension Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net loss included in net periodic pension costs									-666	-1,282	-1,170
Accretion of prior service cost included in net periodic pension costs									288	255	255
Income before income taxes									-378	-1,027	-915
Tax (expense) benefit									132	360	320
Net income									($246)	($667)	($595)

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commitments And Contingencies [Line Items]
Off-balance Sheet Risks, Amount, Liability	338,000	$319,000
Reserve for sold mortgages	264,000
Notional amount of RPAs	19,400,000
Negative fair value of RPAs	1,200,000
Interest-earning deposit accounts pledged for Risk Participation Agreements	370,000	690,000
Approximate payment required in event of default of RPAs	1,200,000
Fair value of risk participation agreement guarantee	74,000
Future Rental Income Receivable Under Subleases	183,000
Letter of Credit [Member]
Commitments And Contingencies [Line Items]
Current carrying amount of the contingent obligation	441,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Term of letter of credit	1 year
Terms of the underlying swaps	10 years
Maximum [Member]
Commitments And Contingencies [Line Items]
Term of letter of credit	5 years
Terms of the underlying swaps	13 years
Maximum [Member] | Letter of Credit [Member]
Commitments And Contingencies [Line Items]
Off-balance Sheet Risks, Amount, Liability	46,900,000

Commitments_and_Contingencies_2

Commitments and Contingencies - Off-balance Sheet Financial Instruments (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Off-balance Sheet Risks, Amount, Liability	$338	$319
Commitments to Extend Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Off-balance Sheet Risks, Amount, Liability	538,488
Performance Letters Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Off-balance Sheet Risks, Amount, Liability	19,240
Standby Letters of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Off-balance Sheet Risks, Amount, Liability	27,526
Other Letters Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Off-balance Sheet Risks, Amount, Liability	$101

Commitments_and_Contingencies_3

Commitments and Contingencies - Summary of Future Minimum Rental Commitments Under Non-cancelable Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$2,297
2016	2,269
2017	2,080
2018	2,096
2019	1,705
Thereafter	23,092
Total	$33,539

Commitments_and_Contingencies_4

Commitments and Contingencies - Summary of Rental Expense Charged to Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leases, Rent Expense, Net [Abstract]
Rental expense	$2,732	$2,304	$2,250
Sublease rental income	-238	-278	-396
Net rental expense	$2,494	$2,026	$1,854

Derivative_Instruments_and_Hed2

Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)	0 Months Ended
	Oct. 24, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 23, 2008
Derivatives, Fair Value [Line Items]
Loans Receivable with Fixed Rates of Interest, Pool, Maturity Period	10 years
Loans Receivable with Fixed Rates of Interest	$29,100,000
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		19,945,000	0
Derivative Liabilities, Fair Value		241,000	0
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount				20,000,000
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	20,000,000
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	25,000,000
Derivative, Fixed Interest Rate	2.10%			2.65%
Derivative, Collateral, Right to Reclaim Cash		300,000
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		19,945,000	0
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value		$241,000	$0

Derivative_Instruments_and_Hed3

Derivative Instruments and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Detail) (Not Designated as Hedging Instrument [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$57,544	$32,601
Derivative Assets, Fair Value	788	346
Derivative Liabilities, Fair Value	112	0
Income for derivatives not designated as hedging instruments	330	-1,147	715
Interest Rate Locks with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	27,007	15,176
Forward Loan Sale Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	30,537	17,425
Net (Gain) Loss on Mortgage Banking Activities [Member] | Interest Rate Locks with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income for derivatives not designated as hedging instruments	467	-1,226	467
Net (Gain) Loss on Mortgage Banking Activities [Member] | Forward Loan Sale Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income for derivatives not designated as hedging instruments	-137	79	248
Other Assets [Member] | Interest Rate Locks with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	788	321
Other Assets [Member] | Forward Loan Sale Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets, Fair Value	0	25
Other Liabilities [Member] | Interest Rate Locks with Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	0	0
Other Liabilities [Member] | Forward Loan Sale Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	$112	$0

Derivative_Instruments_and_Hed4

Derivative Instruments and Hedging Activities - Derivatives Designated as Hedging Instruments (Detail) (Designated as Hedging Instrument [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$19,945	$0
Derivative Assets, Fair Value	0	0
Derivative Liabilities, Fair Value	241	0
Net loss	-66	-1,990	-448
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	19,945	0
Derivative Assets, Fair Value	0	0
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Net Loss on Termination of Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap—cash flow hedge—loss on termination	0	-1,866	0
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap—cash flow hedge—interest payments	66	124	448
Interest rate swap—cash flow hedge—ineffectiveness	0	0	0
Other Liabilities [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities, Fair Value	$241	$0

Derivative_Instruments_and_Hed5

Derivative Instruments and Hedging Activities - Amounts Included in Accumulated Other Comprehensive (Loss) Income for Derivatives Designated as Hedging Instruments (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income, fair value, net of taxes	($157)	$0	($1,241)
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated Other Comprehensive (Loss) Income, fair value, net of taxes	($157)	$0	($1,241)

Fair_Value_Disclosures_Additio

Fair Value Disclosures - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 01, 2014	Jan. 27, 2014	1-May-13	Jun. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Valuation adjustments for loans held for sale	$0	$0
Carrying value of impaired loans held for investment	56,191,000	58,333,000
Valuation allowance of impaired loans held for investment	998,000	2,963,000
Mortgage Servicing Rights Carrying Amount Before Valuation Allowance	5,500,000	5,800,000
Mortgage Servicing Rights Valuation Allowance	0	250,000
Goodwill impairment	0	0	0
Impairment of intangible assets	0
Fair Value Measured on Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a recurring basis	315,071,000	336,627,000
Level 3 [Member] | Fair Value Measured on Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets measured at fair value on a recurring basis	0	0
Sterner Insurance Associates Inc [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum				0
Potential cash payments from contingent consideration, maximum				5,700,000
Potential cash payments from contingent consideration, period of measurement (in years)				3 years
Potential cash payments from contingent consideration, end date				30-Jun-17
Fair value of contingent consideration liability				635,000
Original potential cash payments from contingent consideration, minimum				0
Original potential cash payments from contingent consideration, maximum				5,700,000
Girard Partners [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum					0
Potential cash payments from contingent consideration, maximum					14,500,000
Potential cash payments from contingent consideration, period of measurement (in years)					5 years
Potential cash payments from contingent consideration, end date					31-Dec-18
Fair value of contingent consideration liability					5,500,000
Original potential cash payments from contingent consideration, minimum					0
Original potential cash payments from contingent consideration, maximum					14,500,000
John T Fretz Insurance Agency [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, minimum						0
Potential cash payments from contingent consideration, maximum						620,000
Potential cash payments from contingent consideration, end date						30-Apr-16
Remaining potential cash payments from contingent consideration, period of measurement (in years)						2 years
Javers Group [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Potential cash payments from contingent consideration, period of measurement (in years)							3 years
Potential cash payments from contingent consideration, end date							30-Jun-15
Reduction of other noninterest expense							959,000
Fair value of contingent consideration liability	0
Original potential cash payments from contingent consideration, minimum							0
Original potential cash payments from contingent consideration, maximum							$1,700,000

Fair_Value_Disclosures_Assets_

Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets:
Total available-for-sale securities	$314,283,000	$336,281,000
Fair Value Measured on Recurring Basis [Member]
Assets:
Total available-for-sale securities	314,283,000	336,281,000
Total assets	315,071,000	336,627,000
Liabilities:
Total liabilities	6,894,000	501,000
Fair Value Measured on Recurring Basis [Member] | U.S. Treasuries [Member]
Assets:
Total available-for-sale securities	4,845,000	4,708,000
Fair Value Measured on Recurring Basis [Member] | U.S. Government Corporations and Agencies [Member]
Assets:
Total available-for-sale securities	121,844,000	128,148,000
Fair Value Measured on Recurring Basis [Member] | State and Political Subdivisions [Member]
Assets:
Total available-for-sale securities	102,774,000	107,657,000
Fair Value Measured on Recurring Basis [Member] | Residential Mortgage-Backed Securities [Member]
Assets:
Total available-for-sale securities	13,643,000	35,480,000
Fair Value Measured on Recurring Basis [Member] | Collateralized Mortgage Obligations [Member]
Assets:
Total available-for-sale securities	3,725,000	7,201,000
Fair Value Measured on Recurring Basis [Member] | Corporate Bonds [Member]
Assets:
Total available-for-sale securities	54,440,000	33,840,000
Fair Value Measured on Recurring Basis [Member] | Money Market Mutual Funds [Member]
Assets:
Total available-for-sale securities	11,675,000	16,900,000
Fair Value Measured on Recurring Basis [Member] | Equity Securities [Member]
Assets:
Total available-for-sale securities	1,337,000	2,347,000
Fair Value Measured on Recurring Basis [Member] | Interest Rate Locks with Customers [Member]
Assets:
Interest rate locks with customers	788,000	321,000
Fair Value Measured on Recurring Basis [Member] | Interest Rate Swap [Member]
Liabilities:
Derivative liabilities	241,000
Fair Value Measured on Recurring Basis [Member] | Forward Loan Sale Commitments [Member]
Assets:
Interest rate locks with customers		25,000
Liabilities:
Derivative liabilities	112,000
Fair Value Measured on Recurring Basis [Member] | Contingent Consideration Liability [Member]
Liabilities:
Derivative liabilities	6,541,000	501,000
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member]
Assets:
Total available-for-sale securities	17,857,000	23,955,000
Total assets	17,857,000	23,955,000
Liabilities:
Total liabilities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | U.S. Treasuries [Member]
Assets:
Total available-for-sale securities	4,845,000	4,708,000
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | U.S. Government Corporations and Agencies [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | State and Political Subdivisions [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Residential Mortgage-Backed Securities [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Collateralized Mortgage Obligations [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Corporate Bonds [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Money Market Mutual Funds [Member]
Assets:
Total available-for-sale securities	11,675,000	16,900,000
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Equity Securities [Member]
Assets:
Total available-for-sale securities	1,337,000	2,347,000
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Interest Rate Locks with Customers [Member]
Assets:
Interest rate locks with customers	0	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Interest Rate Swap [Member]
Liabilities:
Derivative liabilities	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Forward Loan Sale Commitments [Member]
Assets:
Interest rate locks with customers		0
Liabilities:
Derivative liabilities	0
Fair Value Measured on Recurring Basis [Member] | Level 1 [Member] | Contingent Consideration Liability [Member]
Liabilities:
Derivative liabilities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member]
Assets:
Total available-for-sale securities	296,426,000	312,326,000
Total assets	297,214,000	312,672,000
Liabilities:
Total liabilities	353,000	0
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | U.S. Treasuries [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | U.S. Government Corporations and Agencies [Member]
Assets:
Total available-for-sale securities	121,844,000	128,148,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | State and Political Subdivisions [Member]
Assets:
Total available-for-sale securities	102,774,000	107,657,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Residential Mortgage-Backed Securities [Member]
Assets:
Total available-for-sale securities	13,643,000	35,480,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Collateralized Mortgage Obligations [Member]
Assets:
Total available-for-sale securities	3,725,000	7,201,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Corporate Bonds [Member]
Assets:
Total available-for-sale securities	54,440,000	33,840,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Money Market Mutual Funds [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Equity Securities [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Interest Rate Locks with Customers [Member]
Assets:
Interest rate locks with customers	788,000	321,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Interest Rate Swap [Member]
Liabilities:
Derivative liabilities	241,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Forward Loan Sale Commitments [Member]
Assets:
Interest rate locks with customers		25,000
Liabilities:
Derivative liabilities	112,000
Fair Value Measured on Recurring Basis [Member] | Level 2 [Member] | Contingent Consideration Liability [Member]
Liabilities:
Derivative liabilities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member]
Assets:
Total available-for-sale securities	0	0
Total assets	0	0
Liabilities:
Total liabilities	6,541,000	501,000
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | U.S. Treasuries [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | U.S. Government Corporations and Agencies [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | State and Political Subdivisions [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Residential Mortgage-Backed Securities [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Collateralized Mortgage Obligations [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Corporate Bonds [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Money Market Mutual Funds [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Equity Securities [Member]
Assets:
Total available-for-sale securities	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Interest Rate Locks with Customers [Member]
Assets:
Interest rate locks with customers	0	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Interest Rate Swap [Member]
Liabilities:
Derivative liabilities	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Forward Loan Sale Commitments [Member]
Assets:
Interest rate locks with customers		0
Liabilities:
Derivative liabilities	0
Fair Value Measured on Recurring Basis [Member] | Level 3 [Member] | Contingent Consideration Liability [Member]
Liabilities:
Derivative liabilities	$6,541,000	$501,000

Fair_Value_Disclosures_Conting

Fair Value Disclosures - Contingent Consideration Liability Change in Amount (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	$501	$903
Contingent Consideration from New Acquisition	6,105	454	842
Payment of Contingent Consideration	-310	0	0
Adjustment of Contingent Consideration	245	-856
Ending Balance	6,541	501	903
Sterner Insurance Associates Inc [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	0
Contingent Consideration from New Acquisition	635
Payment of Contingent Consideration	0
Adjustment of Contingent Consideration	45
Ending Balance	680
Girard Partners [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	0
Contingent Consideration from New Acquisition	5,470
Payment of Contingent Consideration	0
Adjustment of Contingent Consideration	33
Ending Balance	5,503
John T Fretz Insurance Agency [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance	501	0
Contingent Consideration from New Acquisition	0	454
Payment of Contingent Consideration	-310	0
Adjustment of Contingent Consideration	167	47
Ending Balance	358	501
Javers Group [Member]
Change in Contingent Consideration Liability [Roll Forward]
Beginning Balance		903
Contingent Consideration from New Acquisition		0
Payment of Contingent Consideration		0
Adjustment of Contingent Consideration		-903
Ending Balance		$0

Fair_Value_Disclosures_Assets_1

Fair Value Disclosures - Assets Measured at Fair Value on Non-recurring Basis (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans held for investment	$55,193,000	$55,370,000
Total assets	55,193,000	55,370,000
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans held for investment	0	0
Total assets	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans held for investment	0	0
Total assets	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans held for investment	55,193,000	55,370,000
Total assets	$55,193,000	$55,370,000

Fair_Value_Disclosures_Assets_2

Fair Value Disclosures - Assets, Liabilities and Off-balance Sheet Items Not Measured at Fair Value (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets:
Held-to-maturity securities	$54,765,000	$66,853,000
Deposits:
Time deposits	252,593,000	270,789,000
Fair Value [Member]
Assets:
Cash and short-term interest-earning assets	38,565,000	69,169,000
Held-to-maturity securities	54,765,000	66,853,000
Loans held for sale	3,374,000	2,267,000
Net loans and leases held for investment	1,555,033,000	1,477,945,000
Mortgage servicing rights	6,941,000	7,188,000
Other real estate owned	955,000	1,650,000
Total assets	1,659,633,000	1,625,072,000
Deposits:
Demand and savings deposits, non-maturity	1,608,748,000	1,573,709,000
Time deposits	254,224,000	268,909,000
Total deposits	1,862,972,000	1,842,618,000
Short-term borrowings	38,631,000	35,687,000
Total liabilities	1,901,603,000	1,878,305,000
Off-Balance-Sheet:
Commitments to extend credit	-1,420,000	-1,357,000
Fair Value [Member] | Level 1 [Member]
Assets:
Cash and short-term interest-earning assets	38,565,000	69,169,000
Held-to-maturity securities	0	0
Loans held for sale	0	0
Net loans and leases held for investment	0	0
Mortgage servicing rights	0	0
Other real estate owned	0	0
Total assets	38,565,000	69,169,000
Deposits:
Demand and savings deposits, non-maturity	1,608,748,000	1,573,709,000
Time deposits	0	0
Total deposits	1,608,748,000	1,573,709,000
Short-term borrowings	0	0
Total liabilities	1,608,748,000	1,573,709,000
Off-Balance-Sheet:
Commitments to extend credit	0	0
Fair Value [Member] | Level 2 [Member]
Assets:
Cash and short-term interest-earning assets	0	0
Held-to-maturity securities	54,765,000	66,853,000
Loans held for sale	3,374,000	2,267,000
Net loans and leases held for investment	0	0
Mortgage servicing rights	0	7,188,000
Other real estate owned	955,000	1,650,000
Total assets	59,094,000	77,958,000
Deposits:
Demand and savings deposits, non-maturity	0	0
Time deposits	254,224,000	268,909,000
Total deposits	254,224,000	268,909,000
Short-term borrowings	38,631,000	35,687,000
Total liabilities	292,855,000	304,596,000
Off-Balance-Sheet:
Commitments to extend credit	-1,420,000	-1,357,000
Fair Value [Member] | Level 3 [Member]
Assets:
Cash and short-term interest-earning assets	0	0
Held-to-maturity securities	0	0
Loans held for sale	0	0
Net loans and leases held for investment	1,555,033,000	1,477,945,000
Mortgage servicing rights	6,941,000	0
Other real estate owned	0	0
Total assets	1,561,974,000	1,477,945,000
Deposits:
Demand and savings deposits, non-maturity	0	0
Time deposits	0	0
Total deposits	0	0
Short-term borrowings	0	0
Total liabilities	0	0
Off-Balance-Sheet:
Commitments to extend credit	0	0
Carrying Amount [Member]
Assets:
Cash and short-term interest-earning assets	38,565,000	69,169,000
Held-to-maturity securities	54,347,000	66,003,000
Loans held for sale	3,302,000	2,267,000
Net loans and leases held for investment	1,550,770,000	1,461,620,000
Mortgage servicing rights	5,509,000	5,519,000
Other real estate owned	955,000	1,650,000
Total assets	1,653,448,000	1,606,228,000
Deposits:
Demand and savings deposits, non-maturity	1,608,748,000	1,573,709,000
Time deposits	252,593,000	270,789,000
Total deposits	1,861,341,000	1,844,498,000
Short-term borrowings	41,974,000	37,256,000
Total liabilities	1,903,315,000	1,881,754,000
Off-Balance-Sheet:
Commitments to extend credit	$0	$0

Restructuring_Charges_Addition

Restructuring Charges - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Percentage of staff reduced by the Corporation	3.40%
Restructuring charges	$539
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	437	437
Fixed Asset Retirement [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$102

Restructuring_Charges_Roll_For

Restructuring Charges - Roll Forward of Accrued Restructuring Expense (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013
Restructuring Reserve [Roll Forward]
Restructuring charge	$539
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning period	0	0
Restructuring charge	437	437
Payments		-432
Adjustment of restructuring charge		-5
Ending period		$0

Share_Repurchase_Plan_Addition

Share Repurchase Plan - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2014	Oct. 23, 2013
Equity, Class of Treasury Stock [Line Items]
Shares, Outstanding		16,221,607
2007 Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Shares repurchased	540,285
Shares repurchased at cost	$9.90
2007 Plan [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Shares authorized to be repurchased	643,782
2013 Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Shares repurchased		110,997
Shares repurchased at cost		$2
Percentage of shares outstanding authorized to be repurchased under new stock repurchase plan			5.00%
2013 Plan [Member] | Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Shares authorized to be repurchased			800,000

Regulatory_Matters_Schedule_of

Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Corporation [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital (to Risk-Weighted Assets) Actual, Amount	$249,388	$256,329
Total Capital (to Risk-Weighted Assets) Actual, Ratio	12.91%	13.90%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Amount	154,589	147,568
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	193,237	184,460
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital (to Risk-Weighted Assets) Actual, Amount	227,907	232,946
Tier 1 Capital (to Risk-Weighted Assets) Actual, Ratio	11.79%	12.63%
Tier 1 Capital (to Risk - Weighed Assets) For Capital Adequacy, Amount	77,295	73,784
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	115,942	110,676
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets):
Tier 1 Capital (to Average Assets) Actual, Amount	227,907	232,946
Tier 1 Capital (to Average Assets) Actual, Ratio	10.55%	10.85%
Tier 1 Capital (to Average Assets) For Capital Adequacy, Amount	86,371	85,876
Tier 1 Capital (to Average Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	107,964	107,346
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
Bank [Member]
Total Capital (to Risk-Weighted Assets):
Total Capital (to Risk-Weighted Assets) Actual, Amount	232,080	238,336
Total Capital (to Risk-Weighted Assets) Actual, Ratio	12.15%	13.06%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Amount	152,796	145,991
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio	8.00%	8.00%
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	190,995	182,489
Total Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets):
Tier 1 Capital (to Risk-Weighted Assets) Actual, Amount	210,816	215,497
Tier 1 Capital (to Risk-Weighted Assets) Actual, Ratio	11.04%	11.81%
Tier 1 Capital (to Risk - Weighed Assets) For Capital Adequacy, Amount	76,398	72,995
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	114,597	109,493
Tier 1 Capital (to Risk-Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets):
Tier 1 Capital (to Average Assets) Actual, Amount	210,816	215,497
Tier 1 Capital (to Average Assets) Actual, Ratio	9.80%	10.11%
Tier 1 Capital (to Average Assets) For Capital Adequacy, Amount	86,005	85,277
Tier 1 Capital (to Average Assets) For Capital Adequacy, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$107,506	$106,597
Tier 1 Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

Regulatory_Matters_Additional_

Regulatory Matters - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Jul. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount available for dividend distribution without prior approval from Regulatory Agency	12.8
Percentage of Bank's capital and surplus of which extensions of credit to a single affiliate are limited	10.00%
Percentage of Bank's capital and surplus of which extensions of credit to all affiliates are limited	20.00%
Basel III New Requirements [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio		6.00%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio		8.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		8.00%
Total Capital (to Risk-Weighted Assets) To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		10.00%
Common Equity Tier 1 Capital		4.50%
Common Equity Tier 1 Capital To Be Well-Capitalized Under Prompt Corrective Action		6.50%
Common Equity Tier 1 capital minimum buffer percent		2.50%
Minimum capital requirements effective date	1-Jan-15
Capital conservation buffer requirement phase in period in years	3 years
Corporation [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio	4.00%
Total Capital (to Risk-Weighted Assets) For Capital Adequacy, Ratio	8.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%
Total Capital (to Risk-Weighted Assets) To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Capital (to Risk - Weighted Assets) For Capital Adequacy, Ratio		4.00%
Tier 1 Capital (to Risk-Weighted Assets) To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		6.00%

Related_Party_Transactions_Sum

Related Party Transactions - Summary of Activity for Loans to Related Parties (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Related Party Transactions [Roll Forward]
Beginning Balance	$27,802
Additions	10,551
Amounts collected and other reductions	-7,668
Ending Balance	$30,685

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (Penn Foundation Inc. [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Penn Foundation Inc. [Member]
Schedule of Other Related Party Transactions [Line Items]
Employee Assistance Program, Expenses	$19

Related_Party_Transactions_Sum1

Related Party Transactions - Summary of Transactions with Related Parties (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Standby and Commercial Letters of Credits [Member]
Related Party Transaction [Line Items]
Amount of transactions with related parties	$223
Commitments to Extend Credit [Member]
Related Party Transaction [Line Items]
Amount of transactions with related parties	16,453
Deposits Received [Member]
Related Party Transaction [Line Items]
Amount of transactions with related parties	$10,342

Segment_Reporting_Details

Segment Reporting (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Interest income	$18,995	$19,219	$18,725	$18,946	$19,172	$19,457	$19,461	$19,489	$75,885	$77,579	$80,654
Interest expense	1,039	978	981	998	1,080	1,138	1,353	1,546	3,996	5,117	8,174
Net interest income	17,956	18,241	17,744	17,948	18,092	18,319	18,108	17,943	71,889	72,462	72,480
Provision for loan and lease losses	648	233	1,251	1,475	1,614	4,094	3,446	2,074	3,607	11,228	10,035
Noninterest income	12,076	12,510	11,924	12,141	11,116	13,202	10,991	11,475	48,651	46,784	40,260
Total noninterest expense	22,562	22,019	21,790	20,883	21,623	19,988	19,286	20,236	87,254	81,133	76,282
Income before income taxes	6,822	8,499	6,627	7,731	5,971	7,439	6,367	7,108	29,679	26,885	26,423
Income taxes	1,632	2,264	1,547	2,005	1,049	1,400	1,537	1,710	7,448	5,696	5,551
Net income	5,190	6,235	5,080	5,726	4,922	6,039	4,830	5,398	22,231	21,189	20,872
Total assets	2,235,321				2,191,559				2,235,321	2,191,559
Capital expenditures									3,686	3,430	3,230
Banking [Member]
Segment Reporting Information [Line Items]
Interest income									75,850	77,517	80,568
Interest expense									3,998	4,641	6,983
Net interest income									71,852	72,876	73,585
Provision for loan and lease losses									3,607	11,228	10,035
Noninterest income									16,170	22,053	18,018
Total noninterest expense									63,120	60,759	57,917
Income before income taxes									21,295	22,942	23,651
Income taxes									4,043	4,255	4,318
Net income									17,252	18,687	19,333
Total assets	2,154,485				2,129,314				2,154,485	2,129,314
Capital expenditures									2,824	2,679	2,950
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income									1	1	3
Interest expense									0	0	0
Net interest income									1	1	3
Provision for loan and lease losses									0	0	0
Noninterest income									19,918	14,938	12,906
Total noninterest expense									13,855	10,079	9,626
Income before income taxes									6,064	4,860	3,283
Income taxes									2,269	1,850	1,266
Net income									3,795	3,010	2,017
Total assets	34,195				22,737				34,195	22,737
Capital expenditures									100	13	53
Insurance [Member]
Segment Reporting Information [Line Items]
Interest income									0	0	3
Interest expense									0	0	0
Net interest income									0	0	3
Provision for loan and lease losses									0	0	0
Noninterest income									12,038	9,959	8,079
Total noninterest expense									11,435	8,749	7,782
Income before income taxes									603	1,210	300
Income taxes									256	497	113
Net income									347	713	187
Total assets	22,930				19,524				22,930	19,524
Capital expenditures									593	46	37
Other Segments [Member]
Segment Reporting Information [Line Items]
Interest income									34	61	80
Interest expense									-2	476	1,191
Net interest income									36	-415	-1,111
Provision for loan and lease losses									0	0	0
Noninterest income									525	-166	1,257
Total noninterest expense									-1,156	1,546	957
Income before income taxes									1,717	-2,127	-811
Income taxes									880	-906	-146
Net income									837	-1,221	-665
Total assets	23,711				19,984				23,711	19,984
Capital expenditures									$169	$692	$190

Condensed_Financial_Informatio2

Condensed Financial Information - Parent Company Only - Schedule of Condensed Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets:
Cash and due from banks	$31,995	$32,646	$98,399	$39,857
Investments in subsidiaries, at equity in net assets:
Total assets	2,235,321	2,191,559
Liabilities:
Other liabilities	47,452	29,299
Total liabilities	1,950,767	1,911,053
Shareholders' equity:	284,554	280,506	284,277	272,979
Total liabilities and shareholders’ equity	2,235,321	2,191,559
Parent Company [Member]
Assets:
Cash and due from banks	3,120	2,999	12,556	2,554
Investments in securities	1,336	2,347
Investments in subsidiaries, at equity in net assets:
Bank	283,166	271,147
Non-banks	0	0
Other assets	21,115	17,658
Total assets	308,737	294,151
Liabilities:
Dividends payable	3,243	3,257
Other liabilities	20,940	10,388
Total liabilities	24,183	13,645
Shareholders' equity:	284,554	280,506
Total liabilities and shareholders’ equity	$308,737	$294,151

Condensed_Financial_Informatio3

Condensed Financial Information - Parent Company Only - Schedule of Condensed Income Statement (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statements of Income
Other-than-temporary impairment on equity securities									$0	$0	($13)
Net gain on sales of investment securities									635	3,389	305
Loss on termination of interest rate swap									0	-1,866	0
Income before income taxes	6,822	8,499	6,627	7,731	5,971	7,439	6,367	7,108	29,679	26,885	26,423
Income taxes	1,632	2,264	1,547	2,005	1,049	1,400	1,537	1,710	7,448	5,696	5,551
Equity in undistributed income (loss) of subsidiaries:
Net income	5,190	6,235	5,080	5,726	4,922	6,039	4,830	5,398	22,231	21,189	20,872
Parent Company [Member]
Statements of Income
Dividends from bank									12,482	18,482	20,482
Dividends from non-bank									0	0	1,200
Other-than-temporary impairment on equity securities									0	0	-13
Net gain on sales of investment securities									306	644	70
Loss on termination of interest rate swap									0	-1,866	0
Other income									18,334	18,306	17,463
Total operating income									31,122	35,566	39,202
Operating expenses									16,924	19,203	18,323
Income before income taxes									14,198	16,363	20,879
Income taxes									880	-903	-143
Income before equity in undistributed income (loss) of subsidiaries									13,318	17,266	21,022
Equity in undistributed income (loss) of subsidiaries:
Bank									8,913	3,929	-140
Non-banks									0	-6	-10
Net income									$22,231	$21,189	$20,872

Condensed_Financial_Informatio4

Condensed Financial Information - Parent Company Only - Schedule of Condensed Cash Flow Statement (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$22,231	$21,189	$20,872
Adjustments to reconcile net income to net cash provided by operating activities:
Other-than-temporary impairment on equity securities	0	0	13
Net gain on sales of investment securities	-635	-3,389	-305
Loss on termination of interest rate swap	0	1,866	0
Bank owned life insurance income	-1,628	-2,968	-2,670
Depreciation of premises and equipment	3,243	2,927	2,903
Stock-based compensation	1,141	978	1,267
Contributions to pension and other postretirement benefit plans	-254	-2,243	-8,215
Decrease in other assets	-1,093	-2,873	8,065
(Decrease) increase in accrued interest payable and other liabilities	-587	1,101	2,119
Net cash provided by operating activities	31,867	32,806	37,139
Cash flows from investing activities:
Proceeds from bank owned life insurance	0	3,540	2,415
Net cash (used in) provided by investing activities	-38,439	21,595	-58,181
Cash flows from financing activities:
Payment for repurchase of trust preferred securities	0	-20,619	0
Purchases of treasury stock	-4,605	-12,012	-2,319
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,462	2,422	2,515
Proceeds from exercise of stock options	310	0	0
Cash dividends paid	-12,996	-10,029	-16,755
Net cash provided by (used in) financing activities	5,921	-120,154	79,584
Net increase (decrease) in cash and due from financial institutions	-651	-65,753	58,542
Cash and due from banks at beginning of year	32,646	98,399	39,857
Cash and due from banks at end of period	31,995	32,646	98,399
Cash paid during the year for:
Interest	4,118	5,997	8,701
Income tax, net of refunds received	5,899	5,352	1,819
Parent Company [Member]
Cash flows from operating activities:
Net income	22,231	21,189	20,872
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net (income) loss of subsidiaries	-8,913	-3,923	150
Other-than-temporary impairment on equity securities	0	0	13
Net gain on sales of investment securities	-306	-644	-70
Loss on termination of interest rate swap	0	1,866	0
Bank owned life insurance income	-238	-1,070	-255
Depreciation of premises and equipment	364	344	358
Stock-based compensation	1,141	978	1,267
Contributions to pension and other postretirement benefit plans	-254	-2,243	-8,215
Decrease in other assets	714	671	6,270
(Decrease) increase in accrued interest payable and other liabilities	-639	-2,426	2,451
Net cash provided by operating activities	14,100	14,742	22,841
Cash flows from investing activities:
Proceeds from sales of securities	1,131	1,244	2,666
Liquidation of subsidiary, net of cash acquired	0	15,011	1,096
Proceeds from bank owned life insurance	0	772	178
Other, net	-281	-713	1,280
Net cash (used in) provided by investing activities	850	16,314	5,220
Cash flows from financing activities:
Repayment of long-term debt	0	-375	-1,500
Payment for repurchase of trust preferred securities	0	-20,619	0
Purchases of treasury stock	-4,605	-12,012	-2,319
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,462	2,422	2,515
Proceeds from exercise of stock options	310	0	0
Cash dividends paid	-12,996	-10,029	-16,755
Net cash provided by (used in) financing activities	-14,829	-40,613	-18,059
Net increase (decrease) in cash and due from financial institutions	121	-9,557	10,002
Cash and due from banks at beginning of year	2,999	12,556	2,554
Cash and due from banks at end of period	3,120	2,999	12,556
Cash paid during the year for:
Interest	2	754	1,194
Income tax, net of refunds received	$5,300	$5,017	$1,180

Quarterly_Financial_Data_unaud2

Quarterly Financial Data (unaudited) - Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest income	$18,995	$19,219	$18,725	$18,946	$19,172	$19,457	$19,461	$19,489	$75,885	$77,579	$80,654
Interest expense	1,039	978	981	998	1,080	1,138	1,353	1,546	3,996	5,117	8,174
Net interest income	17,956	18,241	17,744	17,948	18,092	18,319	18,108	17,943	71,889	72,462	72,480
Provision for loan and lease losses	648	233	1,251	1,475	1,614	4,094	3,446	2,074	3,607	11,228	10,035
Net interest income after provision for loan and lease losses	17,308	18,008	16,493	16,473	16,478	14,225	14,662	15,869	68,282	61,234	62,445
Noninterest income	12,076	12,510	11,924	12,141	11,116	13,202	10,991	11,475	48,651	46,784	40,260
Total noninterest expense	22,562	22,019	21,790	20,883	21,623	19,988	19,286	20,236	87,254	81,133	76,282
Income before income taxes	6,822	8,499	6,627	7,731	5,971	7,439	6,367	7,108	29,679	26,885	26,423
Income taxes	1,632	2,264	1,547	2,005	1,049	1,400	1,537	1,710	7,448	5,696	5,551
Net income	$5,190	$6,235	$5,080	$5,726	$4,922	$6,039	$4,830	$5,398	$22,231	$21,189	$20,872
Net income per share:
Basic (in dollars per share)	$0.32	$0.38	$0.31	$0.35	$0.30	$0.36	$0.29	$0.32	$1.37	$1.28	$1.25
Diluted (in dollars per share)	$0.32	$0.38	$0.31	$0.35	$0.30	$0.36	$0.29	$0.32	$1.36	$1.27	$1.24
Dividends per share	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.20	$0.80	$0.80	$0.80

Subsequent_Event_Narrative_Det

Subsequent Event - Narrative (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 01, 2015
Business Acquisition [Line Items]
Common stock, par value	$5	$5
Business Acquisition, Transaction Costs	$1,270,000	$87,000	$36,000
Subsequent Event [Member] | Valley Green Bank [Member]
Business Acquisition [Line Items]
Exchange ratio				135.41%
Univest shares issued				3,787,866
Business Combination, Employee Stock Options Outstanding Prior to Exchange				122,377
Business Combination, Employee Stock Options, Payroll Tax Expense				2,200,000
Purchase price assigned to cash in lieu of fractional shares				3,000
Loans Receivable, Fair Value Disclosure				381,500,000
Business Combination, Financing Receivable, Fair Value Disclosure, Premium				4,300,000
Business Combination, Financing Receivable, Fair Value Disclosure, Discount				5,800,000
Business Combination, Fair Value Adjustment, Period of Amortization				10 years
Business Combination, Impaired Financing Receivable				1,400,000
Business Combination, Impaired Financing Receivable, Related Allowance				2,848,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield				291,000
Core deposit intangible				1,867,000
Finite-Lived Intangible Asset, Useful Life				10 years
Business Combination, Deposits, Fair Value Disclosure, Premium				686,000
Business Acquisition, Transaction Costs				$1,200,000

Subsequent_Event_Summary_of_Co

Subsequent Event - Summary of Consideration Paid (Details) (Valley Green Bank [Member], USD $)	0 Months Ended
In Thousands, except Share data, unless otherwise specified	Jan. 01, 2015	Dec. 31, 2014
Purchase price consideration in common stock:
Univest closing stock price at December 31, 2014		$20.24
Subsequent Event [Member]
Purchase price consideration in common stock:
Valley Green common shares outstanding	2,797,454
Exchange ratio	135.41%
Univest shares issued	3,787,866
Purchase price assigned to Valley Green common shares exchanged for Univest stock	$76,667
Purchase price assigned to cash in lieu of fractional shares	3
Purchase price assigned to Valley Green options settled for cash	2,236
Total purchase price	78,906
Fair value of assets acquired:
Cash and due from banks	4,919
Federal funds sold	17,442
Investment securities available-for-sale	12,766
Loans held for investment	382,892
Premises and equipment, net	3,102
Core deposit intangible	1,867
Accrued interest receivable and other assets	3,779
Total identifiable assets	426,767
Fair value of liabilities assumed:
Deposits - noninterest bearing	49,826
Deposits - interest bearing	336,086
Change in control accrued payments	2,070
Accrued interest payable and other liabilities	1,792
Total liabilities	389,774
Net identifiable net assets	36,993
Goodwill resulting from merger	$41,913

Subsequent_Event_Summary_of_Ac

Subsequent Event - Summary of Acquired Impaired Loans (Details) (Subsequent Event [Member], Valley Green Bank [Member], USD $)	Jan. 01, 2015
In Thousands, unless otherwise specified
Subsequent Event [Member] | Valley Green Bank [Member]
Business Acquisition [Line Items]
Contractually required principal and interest payments	$4,539
Contractual cash flows not expected to be collected (nonaccretable difference)	-2,848
Cash flows expected to be collected	1,691
Interest component of expected cash flows (accretable difference)	-291
Fair value of loans acquired with a deterioration of credit quality	$1,400

Subsequent_Event_Supplemental_

Subsequent Event - Supplemental Pro Forma Financial Information (Details) (Valley Green Bank [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Valley Green Bank [Member]
Business Acquisition [Line Items]
Net interest income	$92,356	$89,897
Noninterest income	49,325	47,550
Noninterest expense	98,792	90,456
Net income	$27,503	$26,557
Earnings per share
Basic (in dollars per share)	$1.37	$1.30
Diluted (in dollars per share)	$1.37	$1.30