S&T Bancorp (STBA) 10-Q 2 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Entity Registrant Name	S&T BANCORP INC
Entity Central Index Key	719,220
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,979,192

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks, including interest-bearing deposits of $59,725 and $87,201 at September 30, 2017 and December 31, 2016	$ 114,440	$ 139,486
Securities available-for-sale, at fair value	697,954	693,487
Loans held for sale	47,936	3,793
Portfolio loans, net of unearned income	5,820,758	5,611,419
Allowance for loan losses	(56,712)	(52,775)
Portfolio loans, net	5,764,046	5,558,644
Bank owned life insurance	71,639	72,081
Premises and equipment, net	42,888	44,999
Federal Home Loan Bank and other restricted stock, at cost	33,120	31,817
Goodwill	291,670	291,670
Other intangible assets, net	3,956	4,910
Other assets	102,530	102,166
Total Assets	7,170,179	6,943,053
Deposits:
Noninterest-bearing demand	1,348,939	1,263,833
Interest-bearing demand	646,195	638,300
Money market	1,036,726	936,461
Savings	940,989	1,050,131
Certificates of deposit	1,431,431	1,383,652
Deposits held for sale	38,960	0
Total Deposits	5,443,240	5,272,377
Securities sold under repurchase agreements	39,923	50,832
Short-term borrowings	685,000	660,000
Long-term borrowings	12,911	14,713
Junior subordinated debt securities	45,619	45,619
Other liabilities	55,910	57,556
Total Liabilities	6,282,603	6,101,097
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—36,130,480 shares at September 30, 2017 and December 31, 2016 Outstanding— 34,979,192 shares at September 30, 2017 and 34,913,023 shares at December 31, 2016	90,326	90,326
Additional paid-in capital	215,451	213,098
Retained earnings	626,283	585,891
Accumulated other comprehensive (loss) income	(12,604)	(13,784)
Treasury stock (1,151,288 shares at September 30, 2017 and 1,217,457 shares at December 31, 2016, at cost)	(31,880)	(33,575)
Total Shareholders’ Equity	887,576	841,956
Total Liabilities and Shareholders’ Equity	$ 7,170,179	$ 6,943,053

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Cash and due from banks, interest-bearing amounts	$ 59,725	$ 87,201
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	36,130,480	36,130,480
Common stock, shares outstanding (in shares)	34,979,192	34,913,023
Treasury stock, shares (in shares)	1,151,288	1,217,457

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTEREST INCOME
Loans, including fees	$ 62,450	$ 53,956	$ 179,908	$ 157,133
Investment Securities:
Taxable	2,988	2,570	8,783	7,704
Tax-exempt	896	907	2,744	2,764
Dividends	389	375	1,352	1,077
Total Interest Income	66,723	57,808	192,787	168,678
INTEREST EXPENSE
Deposits	6,748	5,119	18,103	14,403
Borrowings and junior subordinated debt securities	2,519	1,234	6,779	3,474
Total Interest Expense	9,267	6,353	24,882	17,877
NET INTEREST INCOME	57,456	51,455	167,905	150,801
Provision for loan losses	2,850	2,516	12,901	12,379
Net Interest Income After Provision for Loan Losses	54,606	48,939	155,004	138,422
NONINTEREST INCOME
Securities gains (losses), net	0	0	3,987	0
Service charges on deposit accounts	3,207	3,208	9,218	9,272
Debit and credit card	3,067	3,163	8,952	8,818
Wealth management	2,406	2,565	7,237	7,947
Insurance	1,333	1,208	4,258	4,187
Bank owned life insurance	1,209	532	2,249	1,569
Mortgage banking	872	1,077	2,280	2,185
Gain on sale of credit card portfolio	0	0	0	2,066
Other	1,457	1,695	4,631	5,669
Total Noninterest Income	13,551	13,448	42,812	41,713
NONINTEREST EXPENSE
Salaries and employee benefits	20,325	19,011	60,770	57,539
Net occupancy	2,692	2,776	8,258	8,413
Data processing	2,284	2,128	6,670	6,758
Furniture and equipment	1,890	1,932	5,746	5,580
Other taxes	1,208	1,080	3,268	3,076
FDIC insurance	1,152	1,005	3,461	2,938
Professional services and legal	870	817	2,871	2,545
Marketing	766	896	2,468	2,872
Other	5,366	4,794	16,448	17,886
Total Noninterest Expense	36,553	34,439	109,960	107,607
Income Before Taxes	31,604	27,948	87,856	72,528
Provision for income taxes	8,883	7,367	24,182	18,795
Net Income	$ 22,721	$ 20,581	$ 63,674	$ 53,733
Earnings per share—basic (in dollars per share)	$ 0.65	$ 0.59	$ 1.83	$ 1.55
Earnings per share—diluted (in dollars per share)	0.65	0.59	1.82	1.54
Dividends declared per share (in dollars per share)	$ 0.20	$ 0.19	$ 0.60	$ 0.57
Comprehensive Income	$ 22,975	$ 19,686	$ 64,854	$ 64,547

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss)/Income	Treasury Stock
Beginning Balance at Dec. 31, 2015	$ 792,237	$ 90,326	$ 210,545	$ 544,228	$ (16,457)	$ (36,405)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	53,733			53,733
Other comprehensive income (loss), net of tax	10,814				10,814
Cash dividends declared ($0.60 and $0.57) (in dollars per share)	(19,824)			(19,824)
Treasury stock issued for restricted awards (90,115 shares, net of 23,946 forfeitures, and 110,643 shares, net of 5,717 forfeitures)	(115)			(2,945)		2,830
Recognition of restricted stock compensation expense	1,862		1,862
Ending Balance at Sep. 30, 2016	838,707	90,326	212,407	575,192	(5,643)	(33,575)
Beginning Balance at Dec. 31, 2016	841,956	90,326	213,098	585,891	(13,784)	(33,575)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	63,674			63,674
Other comprehensive income (loss), net of tax	1,180				1,180
Cash dividends declared ($0.60 and $0.57) (in dollars per share)	(20,899)			(20,899)
Treasury stock issued for restricted awards (90,115 shares, net of 23,946 forfeitures, and 110,643 shares, net of 5,717 forfeitures)	(688)			(2,383)		1,695
Recognition of restricted stock compensation expense	2,353		2,353
Ending Balance at Sep. 30, 2017	$ 887,576	$ 90,326	$ 215,451	$ 626,283	$ (12,604)	$ (31,880)

Consolidated Statements of Cha6

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared per share (in dollars per share)	$ 0.60	$ 0.57
Treasury stock issued for restricted awards, net of forfeitures (in shares)	90,115	110,643
Forfeitures of restricted stock (in shares)	23,946	5,717

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES
Net income	$ 63,674	$ 53,733
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	12,901	12,379
Net (decrease) increase in Provision for unfunded loan commitments	(546)	90
Depreciation, amortization and accretion	1,597	2,858
Net amortization of discounts and premiums on securities	3,065	2,816
Stock-based compensation expense	2,353	1,862
Securities gains	(3,987)	0
Mortgage loans originated for sale	(66,535)	(75,505)
Proceeds from the sale of mortgage loans	66,604	77,009
Gain on the sale of mortgage loans, net	(1,061)	(1,154)
Gain on the sale of credit card portfolio	0	(2,066)
Pension plan curtailment gain	0	(1,017)
Net increase in interest receivable	(3,886)	(4,019)
Net increase in interest payable	448	1,117
Net decrease in other assets	8,735	702
Net increase in other liabilities	69	3,586
Net Cash Provided by Operating Activities	83,431	72,391
INVESTING ACTIVITIES
Purchases of securities available-for-sale	(69,699)	(53,282)
Proceeds from maturities, prepayments and calls of securities available-for-sale	58,601	52,049
Proceeds from sales of securities available-for-sale	7,751	0
Net proceeds from (purchases of) Federal Home Loan Bank stock	1,304	(5,298)
Net increase in loans	(268,132)	(406,370)
Proceeds from sale of loans not originated for resale	3,581	8,433
Purchases of premises and equipment	(3,646)	(2,744)
Proceeds from the sale of premises and equipment	376	20
Proceeds from the sale of credit card portfolio	0	25,019
Net Cash Used in Investing Activities	(269,864)	(382,173)
FINANCING ACTIVITIES
Net increase in deposits	109,637	169,751
Net increase in certificates of deposit	61,048	99,612
Net decrease in securities sold under repurchase agreements	(10,909)	(21,138)
Net increase in short-term borrowings	25,000	209,000
Repayments of long-term borrowings	(1,802)	(101,740)
Treasury shares issued-net	(688)	(115)
Cash dividends paid to common shareholders	(20,899)	(19,824)
Net Cash Provided by Financing Activities	161,387	335,546
Net (decrease) increase in cash and cash equivalents	(25,046)	25,764
Cash and cash equivalents at beginning of period	139,486	99,399
Cash and Cash Equivalents at End of Period	114,440	125,163
Supplemental Disclosures
Loans transferred to held for sale, net	43,151	1,540
Deposits transferred to held for sale	38,960	0
Interest paid	24,682	16,761
Income taxes paid, net of refunds	21,096	17,974
Transfers of loans to other real estate owned	$ 2,116	$ 581

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION Principles of Consolidation The interim Consolidated Financial Statements include the accounts of S&T Bancorp, Inc., or S&T, and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting. Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements of S&T have been prepared in accordance with generally accepted accounting principles, or GAAP, in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements included in our annual report on Form 10-K for the year ended December 31, 2016 , filed with the Securities and Exchange Commission, or SEC, on February 24, 2017. In the opinion of management, the accompanying interim financial information reflects all adjustments, consisting of normal recurring adjustments, necessary to present fairly our financial position and the results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year or any future period. We previously reported in our annual report on Form 10-K, three reportable operating segments: Community Banking, Insurance and Wealth Management. We have reevaluated our segment reporting as of January 1, 2017 and have determined that Insurance and Wealth Management activities are not material to our consolidated financial results, therefore, we are no longer reporting segment information. Reclassification A mounts in prior period financial statements and footnotes are reclassified whenever necessary to conform to the current period presentation. Reclassifications had no effect on our results of operations or financial condition. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. Recently Adopted Accounting Standards Updates, or ASU or Update Stock Compensation - Improvements to Employee Share-Based Payment Accounting On March 31, 2016 the Financial Accounting Standards Board, or FASB, issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to improve the accounting for share-based payment transactions as part of the FASB's simplification initiative. The ASU changes seven aspects of the accounting for share-based payment award transactions, including: 1. accounting for income taxes; 2. classification of excess tax benefits on the statement of cash flows; 3. forfeitures; 4. minimum statutory tax withholding requirements; 5. classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes; 6. practical expedient - expected term (nonpublic only); and 7. intrinsic value (nonpublic only). This ASU is effective for fiscal years beginning after December 15, 2016 and interim periods within those years for public business entities. The adoption of this ASU had no material impact on our results of operations or financial position. Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting, which eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2016. The amendments will be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The adoption of this ASU had no impact on our results of operations or financial position. Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities. The amendments in this ASU affect all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date. This ASU shortens the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount, which continues to be amortized to maturity. This Update is effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. We have early adopted the provisions of this ASU and it had no impact on our results of operations or financial position. Recently Issued Accounting Standards Updates not yet Adopted Compensation - Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post Retirement Benefit Costs In March 2017, the FASB issued ASU No. 2017-07, Compensation Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post Retirement Benefit Costs (Topic 715). The main objective of this ASU is to provide financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. Effective March 31, 2016, our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plan; as such, the provisions of this ASU will have no impact on our results of operations and financial position. Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Assets Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets In February 2017, the FASB issued ASU No. 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20). The main objective in this ASU is intended to provide greater detail on what types of transactions should be accounted for as partial sales of nonfinancial assets. The scope of this ASU, as originally issued in ASU No. 2014-09 (described below), is intended to reduce the complexity of current GAAP requirements by clarifying which accounting guidance applies to various types of contracts that transfer assets or ownership interest to another entity. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017 and at the same time that ASU No. 2014-09 is effective. Early adoption is permitted, but only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The provisions of this ASU will not materially impact our results of operations and financial position. Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment (Topic 350). The main objective in this ASU is intended to simplify the current requirements for testing goodwill for impairment by eliminating step two from the goodwill impairment test. The amendments are expected to reduce the complexity and costs associated with performing the goodwill impairment test, which could result in recording impairment charges sooner than under the current guidance. This Update is effective for any interim and annual impairment tests in reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position. Business Combinations - Clarifying the Definition of a Business In January 2017, the FASB issued ASU No. 2017-01, Business Combinations - Clarifying the Definition of a Business (Topic 805). The main objective of this ASU is to help financial statement preparers evaluate whether a set of transferred assets and activities (either acquired or disposed of) is a business under Topic 805, Business Combinations by changing the definition of a business. The revised definition will result in fewer acquisitions being accounted for as business combinations than under existing guidance. The definition of a business is significant because it affects the accounting for acquisitions, the identification of reporting units, consolidation evaluations and the accounting for dispositions. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted for transactions not yet reflected in financial statements that have been issued or made available for issuance. The provisions of this ASU will have no impact on our results of operations and financial position. Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory In October 2016, the FASB issued ASU No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory. The main objective of this ASU is to require companies to recognize the income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. This represents a change from existing guidance, which requires companies to defer the income tax effects of intercompany transfers of assets until the asset has been sold to an outside party or otherwise recognized. The new guidance will require companies to defer the income tax effects only of intercompany transfers of inventory. This Update is effective for annual periods beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period. If an entity chooses to early adopt the amendments in the ASU, it must do so in the first interim period of its annual financial statements. That is, an entity cannot adopt the amendments in the ASU in a later interim period and apply them as if they were in effect as of the beginning of the year. The provisions of this ASU will have no impact on our results of operations and financial position. Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The provisions of this ASU will not materially impact our results of operations and financial position. Financial Instruments - Credit Losses In June 2016, the FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments of this Update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The collective changes to the recognition and measurement accounting standards for financial instruments and their anticipated impact on the allowance for credit losses modeling have been universally referred to as the CECL, or current expected credit loss, model. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are evaluating the provisions of this ASU to determine the potential impact on our results of operations and financial position. Revenue from Contracts with Customers In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are: 1. identify the contract with the customer; 2. identify the separate performance obligations in the contract; 3. determine the transaction price; 4. allocate the transaction price to the separate performance obligations; and 5. recognize revenue when each performance obligation is satisfied. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date. This ASU defers the effective date of ASU No. 2014-09 for all entities by one year. In March 2016, the FASB issued ASU No. 2016-08, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers, by reducing: 1. The potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis. In April 2016, the FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing, as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers, by reducing: 1. The potential for diversity in practice at initial application, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis. In May 2016, the FASB issued ASU No. 2016-12, Narrow-scope Improvements and Practical Expedients. The amendments in this ASU do not change the core principles of Topic 606, Revenue from Contracts with Customers. These amendments affect only the narrow aspects of Topic 606: 1. Collectibility Criterion, 2. Presentation of Sales Taxes and Other Similar Taxes Collected from Customers, 3. Noncash Consideration, 4. Contract Modifications at Transition, and 5. Completed Contracts at Transition. ASU 2014-09, including transition requirements for all amendments, is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. Our revenue is comprised of net interest income, which is excluded from the scope of ASU 2014-09, and noninterest income. We are substantially complete with our overall assessment of revenue streams and reviewing of related contracts potentially affected by the ASU, including trust and asset management fees, deposit related fees, interchange fees, merchant income and annuity and insurance commissions. Our assessment suggests that adoption of this ASU should not materially change the method in which we currently recognize revenue for these revenue streams. We are also substantially complete with our evaluation of certain costs related to these revenue streams to determine whether such costs should be presented as expenses or contra-revenue. In addition, we are evaluating the ASU’s expanded disclosure requirements. We plan to adopt ASU No. 2014-09 on January 1, 2018 utilizing the modified retrospective approach with a cumulative effect adjustment to opening retained earnings, if such adjustment is deemed to be material. Leases - Section A-Amendments to the FASB Accounting Standards Codification, Section B-Conforming Amendments Related to Leases and Section C-Background Information and Basis for Conclusions In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires lessees to recognize a right-to-use asset and a lease obligation for all leases on the balance sheet. Lessor accounting remains substantially similar to current GAAP. ASU 2016-02 supersedes Topic 840, Leases. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2018. ASU 2016-02 mandates a modified retrospective transition method for all entities. Early adoption of this ASU is permitted. We anticipate that this ASU will impact our financial statements as it relates to the recognition of right-to-use assets and lease obligations on our Consolidated Balance Sheet. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position. Accounting for Financial Instruments - Overall: Classification and Measurement In January 2016, the FASB issued ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement (Subtopic 825-10). The amendments in this ASU address the following: 1. require equity investments to be measured at fair value with changes in fair value recognized in net income; 2. simplify the impairment assessment of equity investments without readily-determinable fair values by requiring a qualitative assessment to identify impairment; 3. eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4. require entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5. require separate presentation in other comprehensive income for the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6. require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements; and 7. clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2017. The provisions of this ASU will not materially impact our results of operations and financial position.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	The following table reconciles the numerators and denominators of basic and diluted earnings per share for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except shares and per share data) 2017 2016 2017 2016 Numerator for Earnings per Share—Basic: Net income $ 22,721 $ 20,581 $ 63,674 $ 53,733 Less: Income allocated to participating shares 73 68 214 167 Net Income Allocated to Shareholders $ 22,648 $ 20,513 $ 63,460 $ 53,566 Numerator for Earnings per Share—Diluted: Net income $ 22,721 $ 20,581 $ 63,674 $ 53,733 Net Income Available to Shareholders $ 22,721 $ 20,581 $ 63,674 $ 53,733 Denominators for Earnings per Share: Weighted Average Shares Outstanding—Basic 34,751,266 34,687,487 34,722,370 34,674,453 Add: Potentially dilutive shares 208,873 81,018 208,139 72,724 Denominator for Treasury Stock Method—Diluted 34,960,139 34,768,505 34,930,509 34,747,177 Weighted Average Shares Outstanding—Basic 34,751,266 34,687,487 34,722,370 34,674,453 Add: Average participating shares outstanding 111,821 114,746 116,969 108,414 Denominator for Two-Class Method—Diluted 34,863,087 34,802,233 34,839,339 34,782,867 Earnings per share—basic $ 0.65 $ 0.59 $ 1.83 $ 1.55 Earnings per share—diluted $ 0.65 $ 0.59 $ 1.82 $ 1.54 Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019 443,575 517,012 452,188 517,012 Restricted stock considered anti-dilutive excluded from potentially dilutive shares 92,577 146,695 95,707 134,983

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivative financial instruments are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, and other repossessed assets, mortgage servicing rights, or MSRs, and certain other assets. Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed based on market data that we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances. The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows: Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets. Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data. Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred. The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis. Recurring Basis Securities Available-for-Sale Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our debt securities. The market valuation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models and vast descriptive terms and conditions databases, as well as extensive quality control programs. Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2. Marketable equity securities that are not readily traded and do not have a quotable market are classified as Level 3. Trading Assets We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Rabbi Trust assets are reported in other assets in the Consolidated Balance Sheets. Derivative Financial Instruments We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparties' nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings. Nonrecurring Basis Loans Held for Sale Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3. Impaired Loans Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish specific reserves based on the following three impairment methods: 1. the present value of expected future cash flows discounted at the loan’s original effective interest rate; 2. the loan’s observable market price; or 3. the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraisals may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3. OREO and Other Repossessed Assets OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3. Mortgage Servicing Rights The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Comprehensive Income. Other Assets We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above. Financial Instruments In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments. Cash and Cash Equivalents The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value. Loans The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is the carrying value less any specific reserve on the loan if it is impaired. The carrying amount of accrued interest approximates fair value. Bank Owned Life Insurance Fair value approximates net cash surrender value of bank owned life insurance. Federal Home Loan Bank, or FHLB, and Other Restricted Stock It is not practical to determine the fair value of our FHLB and other restricted stock due to the restrictions placed on the transferability of these stocks; restricted stock is presented at carrying value. Deposits The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value. Short-Term Borrowings The carrying amounts of securities sold under repurchase agreements, or REPOs, and other short-term borrowings approximate their fair values. Long-Term Borrowings The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values. Junior Subordinated Debt Securities The interest rate on the variable rate junior subordinated debt securities is reset quarterly; therefore, the carrying values approximate their fair values. Loan Commitments and Standby Letters of Credit Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Other Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations. Assets and Liabilities Recorded at Fair Value on a Recurring Basis The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at September 30, 2017 and December 31, 2016 . There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented. September 30, 2017 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Securities available-for-sale: U.S. Treasury securities $ — $ 24,894 $ — $ 24,894 Obligations of U.S. government corporations and agencies — 196,008 — 196,008 Collateralized mortgage obligations of U.S. government corporations and agencies — 114,895 — 114,895 Residential mortgage-backed securities of U.S. government corporations and agencies — 35,197 — 35,197 Commercial mortgage-backed securities of U.S. government corporations and agencies — 192,604 — 192,604 Obligations of states and political subdivisions — 129,304 — 129,304 Marketable equity securities — 5,052 — 5,052 Total securities available-for-sale — 697,954 — 697,954 Trading securities held in a Rabbi Trust 5,039 — — 5,039 Total securities 5,039 697,954 — 702,993 Derivative financial assets: Interest rate swap contracts - commercial loans — 4,814 — 4,814 Interest rate lock commitments - mortgage loans — 452 — 452 Total Assets $ 5,039 $ 703,220 $ — $ 708,259 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 4,786 $ — $ 4,786 Forward sale contracts - mortgage loans — 16 — 16 Total Liabilities $ — $ 4,802 $ — $ 4,802 December 31, 2016 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Securities available-for-sale: U.S. Treasury securities $ — $ 24,811 $ — $ 24,811 Obligations of U.S. government corporations and agencies — 232,179 — 232,179 Collateralized mortgage obligations of U.S. government corporations and agencies — 129,777 — 129,777 Residential mortgage-backed securities of U.S. government corporations and agencies — 37,358 — 37,358 Commercial mortgage-backed securities of U.S. government corporations and agencies — 125,604 — 125,604 Obligations of states and political subdivisions — 132,509 — 132,509 Marketable equity securities — 11,249 — 11,249 Total securities available-for-sale — 693,487 — 693,487 Trading securities held in a Rabbi Trust 4,410 — — 4,410 Total securities 4,410 693,487 — 697,897 Derivative financial assets: Interest rate swap contracts - commercial loans — 6,960 — 6,960 Interest rate lock commitments - mortgage loans — 236 — 236 Total Assets $ 4,410 $ 700,683 $ — $ 705,093 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 6,958 $ — $ 6,958 Forward sale contracts - mortgage loans — 27 — 27 Total Liabilities $ — $ 6,985 $ — $ 6,985 We may be required to measure certain assets and liabilities at fair value on a nonrecurring basis. Nonrecurring assets are recorded at the lower of cost or fair value in our financial statements. There were no liabilities measured at fair value on a nonrecurring basis at either September 30, 2017 or December 31, 2016 . The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS (1) Loans held for sale $ — $ — $ — $ — $ — $ — $ 1,802 $ 1,802 Impaired loans — — 11,407 11,407 — — 10,329 10,329 Other real estate owned — — 718 718 — — 396 396 Mortgage servicing rights — — 481 481 — — 538 538 Total Assets $ — $ — $ 12,606 $ 12,606 $ — $ — $ 13,065 $ 13,065 (1) This table presents only the nonrecurring items that are recorded at fair value in our financial statements. The carrying values and fair values of our financial instruments at September 30, 2017 and December 31, 2016 are presented in the following tables: Carrying Value (1) Fair Value Measurements at September 30, 2017 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 114,440 $ 114,400 $ 114,400 $ — $ — Securities available-for-sale 697,954 697,954 — 697,954 — Loans held for sale 47,936 48,045 — — 48,045 Portfolio loans, net of unearned income 5,820,758 5,758,326 — — 5,758,326 Bank owned life insurance 71,639 71,639 — 71,639 — FHLB and other restricted stock 33,120 33,120 — — 33,120 Trading securities held in a Rabbi Trust 5,039 5,039 5,039 — — Mortgage servicing rights 3,992 4,286 — — 4,286 Interest rate swap contracts - commercial loans 4,814 4,814 — 4,814 — Interest rate lock commitments - mortgage loans 452 452 — 452 — LIABILITIES Deposits $ 5,443,240 $ 5,448,025 $ — $ — $ 5,448,025 Securities sold under repurchase agreements 39,923 39,923 — — 39,923 Short-term borrowings 685,000 685,000 — — 685,000 Long-term borrowings 12,911 13,318 — — 13,318 Junior subordinated debt securities 45,619 45,619 — — 45,619 Interest rate swap contracts - commercial loans 4,786 4,786 — 4,786 — Forward sale contracts - mortgage loans 16 16 — 16 — (1) As reported in the Consolidated Balance Sheets Carrying Value (1) Fair Value Measurements at December 31, 2016 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 139,486 $ 139,486 $ 139,486 $ — $ — Securities available-for-sale 693,487 693,487 — 693,487 — Loans held for sale 3,793 3,815 — — 3,815 Portfolio loans, net of unearned income 5,611,419 5,551,266 — — 5,551,266 Bank owned life insurance 72,081 72,081 — 72,081 — FHLB and other restricted stock 31,817 31,817 — — 31,817 Trading securities held in a Rabbi Trust 4,410 4,410 4,410 — — Mortgage servicing rights 3,744 4,098 — — 4,098 Interest rate swap contracts - commercial loans 6,960 6,960 — 6,960 — Interest rate lock commitments - mortgage loans 236 236 — 236 — LIABILITIES Deposits $ 5,272,377 $ 5,276,499 $ — $ — $ 5,276,499 Securities sold under repurchase agreements 50,832 50,832 — — 50,832 Short-term borrowings 660,000 660,000 — — 660,000 Long-term borrowings 14,713 15,267 — — 15,267 Junior subordinated debt securities 45,619 45,619 — — 45,619 Interest rate swap contracts - commercial loans 6,958 6,958 — 6,958 — Forward sale contracts - mortgage loans 27 27 — 27 — (1) As reported in the Consolidated Balance Sheets

Securities Available-for-Sale

Securities Available-for-Sale	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
SECURITIES AVAILABLE-FOR-SALE	The following table presents the amortized cost and fair value of available-for-sale securities as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. treasury securities $ 24,930 $ 2 $ (38 ) $ 24,894 $ 24,891 $ 47 $ (127 ) $ 24,811 Obligations of U.S. government corporations and agencies 195,194 1,171 (357 ) 196,008 230,989 1,573 (383 ) 232,179 Collateralized mortgage obligations of U.S. government corporations and agencies 115,027 476 (608 ) 114,895 130,046 465 (734 ) 129,777 Residential mortgage-backed securities of U.S. government corporations and agencies 34,452 896 (151 ) 35,197 36,606 984 (232 ) 37,358 Commercial mortgage-backed securities of U.S. government corporations and agencies 193,382 511 (1,289 ) 192,604 127,311 243 (1,950 ) 125,604 Obligations of states and political subdivisions 123,672 5,632 — 129,304 128,783 3,772 (46 ) 132,509 Debt Securities 686,657 8,688 (2,443 ) 692,902 678,626 7,084 (3,472 ) 682,238 Marketable equity securities 3,815 1,237 — 5,052 7,579 3,670 — 11,249 Total $ 690,472 $ 9,925 $ (2,443 ) $ 697,954 $ 686,205 $ 10,754 $ (3,472 ) $ 693,487 The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented: September 30, 2017 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 2 $ 14,903 $ (38 ) — $ — $ — 2 $ 14,903 $ (38 ) Obligations of U.S. government corporations and agencies 8 72,102 (357 ) — — — 8 72,102 (357 ) Collateralized mortgage obligations of U.S. government corporations and agencies 8 62,408 (608 ) — — — 8 62,408 (608 ) Residential mortgage-backed securities of U.S. government corporations and agencies 2 9,071 (151 ) — — — 2 9,071 (151 ) Commercial mortgage-backed securities of U.S. government corporations and agencies 10 100,322 (1,057 ) 1 7,586 (232 ) 11 107,908 (1,289 ) Obligations of states and political subdivisions — — — — — — — — — Debt Securities 30 258,806 (2,211 ) 1 7,586 (232 ) 31 266,392 (2,443 ) Marketable equity securities — — — — — — — — — Total Temporarily Impaired Securities 30 $ 258,806 $ (2,211 ) 1 $ 7,586 $ (232 ) 31 $ 266,392 $ (2,443 ) December 31, 2016 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 1 $ 9,811 $ (127 ) — $ — $ — 1 $ 9,811 $ (127 ) Obligations of U.S. government corporations and agencies 7 62,483 (383 ) — — — 7 62,483 (383 ) Collateralized mortgage obligations of U.S. government corporations and agencies 10 83,031 (734 ) — — — 10 83,031 (734 ) Residential mortgage-backed securities of U.S. government corporations and agencies 2 10,022 (232 ) — — — 2 10,022 (232 ) Commercial mortgage-backed securities of U.S. government corporations and agencies 10 96,576 (1,950 ) — — — 10 96,576 (1,950 ) Obligations of states and political subdivisions 1 5,577 (46 ) — — — 1 5,577 (46 ) Debt Securities 31 267,500 (3,472 ) — — — 31 267,500 (3,472 ) Marketable equity securities — — — — — — — — — Total Temporarily Impaired Securities 31 $ 267,500 $ (3,472 ) — $ — $ — 31 $ 267,500 $ (3,472 ) We do not believe any individual unrealized loss as of September 30, 2017 represents an other than temporary impairment, or OTTI. At September 30, 2017 and December 31, 2016 there were 31 debt securities in an unrealized loss position. There were no marketable equity securities at September 30, 2017 and December 31, 2016 with unrealized losses. The unrealized losses on debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these securities. All debt securities are determined to be investment grade and are paying principal and interest according to the contractual terms of the security. We do not intend to sell and it is not more likely than not that we will be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost. The following table displays net unrealized gains and losses, net of tax, on securities available for sale included in accumulated other comprehensive (loss)/income, for the periods presented: September 30, 2017 December 31, 2016 (dollars in thousands) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Gains/ (Losses) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Gains/ (Losses) Total unrealized gains/(losses) on securities available-for-sale $ 9,925 $ (2,443 ) $ 7,482 $ 10,754 $ (3,472 ) $ 7,282 Income tax expense/(benefit) (3,485 ) 858 (2,627 ) (3,776 ) 1,219 (2,557 ) Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss) $ 6,440 $ (1,585 ) $ 4,855 $ 6,978 $ (2,253 ) $ 4,725 The amortized cost and fair value of securities available-for-sale at September 30, 2017 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2017 (dollars in thousands) Amortized Cost Fair Value Obligations of the U.S. Treasury, U.S. government corporations and agencies, and obligations of states and political subdivisions Due in one year or less $ 63,576 $ 63,646 Due after one year through five years 177,864 180,087 Due after five years through ten years 56,875 58,890 Due after ten years 45,481 47,583 343,796 350,206 Collateralized mortgage obligations of U.S. government corporations and agencies 115,027 114,895 Residential mortgage-backed securities of U.S. government corporations and agencies 34,452 35,197 Commercial mortgage-backed securities of U.S. government corporations and agencies 193,382 192,604 Debt Securities 686,657 692,902 Marketable equity securities 3,815 5,052 Total $ 690,472 $ 697,954 At September 30, 2017 and December 31, 2016 , securities with carrying values of $ 274 million and $342 million were pledged for various regulatory and legal requirements.

Loans and Loans Held for Sale

Loans and Loans Held for Sale	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOANS AND LOANS HELD FOR SALE	Loans are presented net of unearned income of $3.6 million and $5.2 million at September 30, 2017 and December 31, 2016 and net of a discount related to purchase accounting fair value adjustments of $4.6 million and $7.1 million at September 30, 2017 and December 31, 2016 . The following table indicates the composition of loans as of the dates presented: (dollars in thousands) September 30, 2017 December 31, 2016 Commercial Commercial real estate $ 2,681,693 $ 2,498,476 Commercial and industrial 1,446,811 1,401,035 Commercial construction 432,887 455,884 Total Commercial Loans 4,561,391 4,355,395 Consumer Residential mortgage 697,367 701,982 Home equity 487,806 482,284 Installment and other consumer 69,644 65,852 Consumer construction 4,550 5,906 Total Consumer Loans 1,259,367 1,256,024 Total Portfolio Loans 5,820,758 5,611,419 Loans held for sale 47,936 3,793 Total Loans $ 5,868,694 $ 5,615,212 As of September 30, 2017, our acquired loans from the 2015 Integrity Bancshares, Inc. merger, or the Merger, were $415 million which included $219 million of Commercial Real Estate, or CRE, $103 million of Commercial & Industrial, or C&I, $15 million of commercial construction, $60 million of residential mortgage and $18 million of home equity, installment and other consumer construction. As of December 31, 2016 acquired loans were $543 million which included $273 million of CRE, $141 million of C&I, $33.0 million of commercial construction, $74.0 million of residential mortgage and $22.0 million of home equity, installment and other consumer construction. We attempt to limit our exposure to credit risk by diversifying our loan portfolio by segment, geography, collateral and industry and actively managing concentrations. When concentrations exist in certain segments, we monitor this risk by reviewing the relevant economic indicators and internal risk rating trends and through stress testing of the loans in these segments. Total commercial loans represented 78 percent of total portfolio loans at September 30, 2017 and December 31, 2016 . Within our commercial portfolio, the CRE and commercial construction portfolios comprised $3.1 billion or 68 percent of total commercial loans and 54 percent of total portfolio loans at September 30, 2017 and comprised of $3.0 billion or 68 percent of total commercial loans and 53 percent of total portfolio loans at December 31, 2016 . Further segmentation of the CRE and Commercial Construction portfolios by collateral type reveals no concentration in excess of 14 percent of total CRE and Commercial Construction loans at September 30, 2017 and December 31, 2016 . Our market area includes Pennsylvania and the contiguous states of Ohio, West Virginia, New York and Maryland. The majority of our commercial and consumer loans are made to businesses and individuals in this market area, resulting in a regional geographic concentration. We believe our knowledge and familiarity with customers and conditions locally outweighs this geographic concentration risk. The conditions of the local and regional economies are monitored closely through publicly available data as well as information supplied by our customers. Our CRE and Commercial Construction portfolios have out-of-market exposure of 5.1 percent of the total CRE and Commercial Construction portfolios and 2.7 percent of total loans at September 30, 2017 . This compares to 5.2 percent of the total CRE and Commercial Construction portfolios and 2.7 percent of total loans at December 31, 2016 . The increase in loans held for sale of $44.1 million related to $43.4 million of loans that were held for sale due to a branch sale that is expected to close in the fourth quarter of 2017. We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan, to determine if they should be designated as troubled debt restructurings, or TDRs. All TDRs are considered to be impaired loans and will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring. The following table summarizes restructured loans as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Performing TDRs Nonperforming TDRs Total TDRs Performing TDRs Nonperforming TDRs Total TDRs Commercial real estate $ 2,618 $ 1,083 $ 3,701 $ 2,994 $ 646 $ 3,640 Commercial and industrial 4,063 3,580 7,643 1,387 4,493 5,880 Commercial construction 2,914 421 3,335 2,966 430 3,396 Residential mortgage 2,096 4,095 6,191 2,375 5,068 7,443 Home equity 3,871 1,013 4,884 3,683 954 4,637 Installment and other consumer 43 11 54 18 7 25 Total $ 15,605 $ 10,203 $ 25,808 $ 13,423 $ 11,598 $ 25,021 There were no TDRs that returned to accruing status during the three months ended September 30, 2017 and one TDR, totaling $2.0 million , that returned to accruing status during the nine months ended September 30, 2017 . There were no TDRs returned to accruing status during the three and nine months ended September 30, 2016 . The following tables present details related to loans identified as TDRs during the three and nine months ended September 30, 2017 and 2016: Three Months Ended September 30, 2017 Three months ended September 30, 2016 (dollars in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment ( 1) Post-Modification Outstanding Recorded Investment (1) Total Difference in Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment (1) Post-Modification Outstanding Recorded Investment (1) Total Difference in Recorded Investment Commercial real estate Interest rate reduction — — — — 1 248 250 2 Maturity date extension 1 400 400 — — — — — Commercial and industrial Maturity date extension 1 274 816 542 2 4,105 4,162 57 Residential mortgage Chapter 7 bankruptcy(2) 1 148 — (148 ) 3 153 152 (1 ) Maturity date extension and interest rate reduction — — — — 1 280 280 — Home equity Chapter 7 bankruptcy(2) 4 72 70 (2 ) 7 163 161 (2 ) Installment and other consumer Chapter 7 bankruptcy(2) 8 200 185 (15 ) — — — — Total by Concession Type Chapter 7 bankruptcy(2) 13 420 255 (165 ) 10 316 313 (3 ) Interest rate reduction — — — — 1 248 250 2 Maturity date extension and interest rate reduction — — — — 1 280 280 — Maturity date extension 2 674 1,216 542 2 4,105 4,162 57 Total 15 $ 1,094 $ 1,471 $ 377 14 $ 4,949 $ 5,005 $ 56 (1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (dollars in thousands) Number of Pre-Modification (1) Post-Modification (1) Total Difference Number of Pre-Modification ( 1) Post-Modification (1) Total Difference Commercial real estate Principal deferral 1 $ 100 $ 100 $ — 1 $ 4,721 $ 2,270 $ (2,451 ) Chapter 7 bankruptcy (2) — — — — 1 709 681 (28 ) Interest rate reduction — — — — 1 250 248 (2 ) Maturity date extension 1 400 400 — — — — — Commercial and industrial Principal deferral 1 429 429 — 5 985 985 — Maturity Date extension and interest rate reduction 2 1,799 1,799 — — — — — Maturity date extension 1 274 816 542 5 4,860 4,891 31 Commercial Construction Maturity date extension — — — — 5 1,357 1,302 (55 ) Residential mortgage Principal deferral — — — — 1 3,273 3,273 — Chapter 7 bankruptcy (2) 2 181 32 (149 ) 7 439 433 (6 ) Maturity date extension — — — — 1 483 483 — Maturity date extension and interest rate reduction — — — — 1 280 280 — Home equity Principal deferral — — — — 1 47 46 (1 ) Chapter 7 bankruptcy (2) 13 380 375 (5 ) 16 481 470 (11 ) Maturity date extension and interest rate reduction 1 173 120 (53 ) 1 130 128 (2 ) Maturity date extension 1 231 231 — 4 274 272 (2 ) Installment and other consumer Chapter 7 bankruptcy (2) 10 237 220 (17 ) 2 16 13 (3 ) Total by Concession Type Principal deferral 2 529 529 — 8 9,026 6,574 (2,452 ) Chapter 7 bankruptcy (2) 25 798 627 (171 ) 26 1,645 1,597 (48 ) Interest rate reduction — — — — 1 250 248 (2 ) Maturity date extension and interest rate reduction 3 1,972 1,919 (53 ) 2 410 408 (2 ) Maturity date extension 3 905 1,447 542 15 6,974 6,948 (26 ) Total 33 $ 4,204 $ 4,522 $ 318 52 $ 18,305 $ 15,775 $ (2,530 ) (1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. (2) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed. For the three months ended September 30, 2017 , we modified one CRE loan totaling $1.0 million that was not considered to be a TDR. For the nine months ended September 30, 2017, we modified 13 loans totaling $11.8 million of which nine were C&I loans totaling $10.3 million and four CRE loans totaling $1.5 million that were not considered to be TDRs. The 2017 modifications primarily represented insignificant delays in the timing of payments, concessions where we were adequately compensated through principal pay downs, fees or additional collateral or we concluded that no concession was granted. These modifications compare to 12 C&I loans totaling $16.9 million and one CRE loan totaling $1.9 million for the three months ended September 30, 2016 and 15 C&I loans totaling $25.6 million and two CRE loans totaling $2.5 million for the nine months ended September 30, 2016 that were not considered to be TDRs. The 2016 modifications were administrative extensions of maturity dates that were determined not to be a concession. As of September 30, 2017 , we had no commitments to lend additional funds on TDRs. Defaulted TDRs are defined as loans having a payment default of 90 days or more after the restructuring takes place. There were no TDRs that defaulted during the three and nine months ended September 30, 2017 and September 30, 2016. The following table is a summary of nonperforming assets as of the dates presented: Nonperforming Assets (dollars in thousands) September 30, 2017 December 31, 2016 Nonperforming Assets Nonaccrual loans $ 19,290 $ 31,037 Nonaccrual TDRs 10,203 11,598 Total nonaccrual loans 29,493 42,635 OREO 1,033 679 Total Nonperforming Assets $ 30,526 $ 43,314

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
ALLOWANCE FOR LOAN LOSSES	We maintain an allowance for loan losses, or ALL, at a level determined to be adequate to absorb estimated probable credit losses inherent in the loan portfolio as of the balance sheet date. We develop and document a systematic ALL methodology based on the following portfolio segments: 1. CRE, 2. C&I, 3. Commercial Construction, 4. Consumer Real Estate and 5. Other Consumer. The following are key risks within each portfolio segment: CRE —Loans secured by commercial purpose real estate, including both owner occupied properties and investment properties, for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied. C&I —Loans made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often does not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt. Commercial Construction —Loans made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be completed, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer. Consumer Real Estate —Loans secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residential mortgages, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing market can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt. Other Consumer —Loans made to individuals that may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values. We further assess risk within each portfolio segment by pooling loans with similar risk characteristics. For the commercial loan classes, the most important indicator of risk is the internally assigned risk rating, including pass, special mention and substandard. Consumer loans are pooled by type of collateral, lien position and loan to value, or LTV, for Consumer Real Estate loans. Historical loss rates are applied to these loan pools to determine the reserve for loans collectively evaluated for impairment. The ALL methodology for groups of loans collectively evaluated for impairment is comprised of both a quantitative and qualitative analysis. A key assumption in the quantitative component of the reserve is the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. Management monitors various credit quality indicators for both the commercial and consumer loan portfolios, including delinquency, nonperforming status and changes in risk ratings on a monthly basis. The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented: September 30, 2017 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due Nonaccrual Total Past Due Total Loans Commercial real estate $ 2,674,171 $ 530 $ 421 $ 6,571 $ 7,522 $ 2,681,693 Commercial and industrial 1,438,224 499 739 7,349 8,587 1,446,811 Commercial construction 428,744 75 — 4,068 4,143 432,887 Residential mortgage 684,848 3,872 865 7,782 12,519 697,367 Home equity 482,000 1,616 515 3,675 5,806 487,806 Installment and other consumer 69,316 228 52 48 328 69,644 Consumer construction 4,550 — — — — 4,550 Loans held for sale 47,936 — — — — 47,936 Total $ 5,829,789 $ 6,820 $ 2,592 $ 29,493 $ 38,905 $ 5,868,694 December 31, 2016 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due Nonaccrual Total Past Due Total Loans Commercial real estate $ 2,479,513 $ 2,032 $ 759 $ 16,172 $ 18,963 $ 2,498,476 Commercial and industrial 1,391,475 1,061 428 8,071 9,560 1,401,035 Commercial construction 450,410 547 — 4,927 5,474 455,884 Residential mortgage 689,635 1,312 1,117 9,918 12,347 701,982 Home equity 476,866 1,470 509 3,439 5,418 482,284 Installment and other consumer 65,525 176 43 108 327 65,852 Consumer construction 5,906 — — — — 5,906 Loans held for sale 3,793 — — — — 3,793 Total $ 5,563,123 $ 6,598 $ 2,856 $ 42,635 $ 52,089 $ 5,615,212 We continually monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans within the pass rating generally have a lower risk of loss than loans risk rated as special mention or substandard. Our risk ratings are consistent with regulatory guidance and are as follows: Pass —The loan is currently performing and is of high quality. Special Mention —A special mention loan has potential weaknesses that warrant management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects or in the strength of our credit position at some future date. Economic and market conditions, beyond the borrower’s control, may in the future necessitate this classification. Substandard —A substandard loan is not adequately protected by the net worth and/or paying capacity of the borrower or by the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. These loans are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected. The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented: September 30, 2017 (dollars in thousands) Commercial Real Estate % of Total Commercial and Industrial % of Total Commercial Construction % of Total Total % of Total Pass $ 2,587,393 96.5 % $ 1,354,269 93.6 % $ 411,379 95.0 % $ 4,353,041 95.4 % Special mention 55,218 2.1 % 53,853 3.7 % 11,503 2.7 % 120,574 2.6 % Substandard 39,082 1.4 % 38,689 2.7 % 10,005 2.3 % 87,776 2.0 % Total $ 2,681,693 100.0 % $ 1,446,811 100.0 % $ 432,887 100.0 % $ 4,561,391 100.0 % December 31, 2016 (dollars in thousands) Commercial Real Estate % of Total Commercial and Industrial % of Total Commercial Construction % of Total Total % of Total Pass $ 2,423,742 97.0 % $ 1,315,507 93.9 % $ 430,472 94.4 % $ 4,169,721 95.7 % Special mention 33,098 1.3 % 40,409 2.9 % 14,691 3.2 % 88,198 2.0 % Substandard 41,636 1.7 % 45,119 3.2 % 10,721 2.4 % 97,476 2.3 % Total $ 2,498,476 100.0 % $ 1,401,035 100.0 % $ 455,884 100.0 % $ 4,355,395 100.0 % We monitor the delinquent status of the consumer portfolio on a monthly basis. Loans are considered nonperforming when interest and principal are 90 days or more past due or management has determined that a material deterioration in the borrower’s financial condition exists. The risk of loss is generally highest for nonperforming loans. The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented: September 30, 2017 (dollars in thousands) Residential Mortgage % of Total Home Equity % of Total Installment and other consumer % of Total Consumer Construction % of Total Total % of Total Performing $ 689,585 98.9 % $ 484,131 99.2 % $ 69,596 99.9 % $ 4,550 100.0 % $ 1,247,862 99.1 % Nonperforming 7,782 1.1 % 3,675 0.8 % 48 0.1 % — — % 11,505 0.9 % Total $ 697,367 100.0 % $ 487,806 100.0 % $ 69,644 100.0 % $ 4,550 100.0 % $ 1,259,367 100.0 % December 31, 2016 (dollars in thousands) Residential Mortgage % of Total Home Equity % of Total Installment and other consumer % of Total Consumer Construction % of Total Total % of Total Performing $ 692,064 98.6 % $ 478,845 99.3 % $ 65,744 99.8 % $ 5,906 100.0 % $ 1,242,559 98.9 % Nonperforming 9,918 1.4 % 3,439 0.7 % 108 0.2 % — — % 13,465 1.1 % Total $ 701,982 100.0 % $ 482,284 100.0 % $ 65,852 100.0 % $ 5,906 100.0 % $ 1,256,024 100.0 % We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. Loans are considered to be impaired when based upon current information and events it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is expected that the remaining principal and interest will be fully collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. The following table summarizes investments in loans considered to be impaired and related information on those impaired loans as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With a related allowance recorded: Commercial real estate $ — $ — $ — $ — $ — $ — Commercial and industrial 2,468 2,501 260 964 2,433 771 Commercial construction — — — — — — Consumer real estate 22 22 22 26 26 26 Other consumer 30 30 30 1 1 1 Total with a Related Allowance Recorded 2,520 2,553 312 991 2,460 798 Without a related allowance recorded: Commercial real estate 6,341 6,985 — 16,352 17,654 — Commercial and industrial 6,075 8,245 — 5,902 7,699 — Commercial construction 5,974 8,629 — 6,613 10,306 — Consumer real estate 11,054 11,979 — 12,053 12,849 — Other consumer 24 30 — 24 31 — Total without a Related Allowance Recorded 29,468 35,868 — 40,944 48,539 — Total: Commercial real estate 6,341 6,985 — 16,352 17,654 — Commercial and industrial 8,543 10,746 260 6,866 10,132 771 Commercial construction 5,974 8,629 — 6,613 10,306 — Consumer real estate 11,076 12,001 22 12,079 12,875 26 Other consumer 54 60 30 25 32 1 Total $ 31,988 $ 38,421 $ 312 $ 41,935 $ 50,999 $ 798 As of September 30, 2017 , we had $32.0 million of impaired loans, which included $6.5 million of acquired loans from the Merger that experienced credit deterioration since the acquisition date. This compares to $41.9 million of impaired loans at December 31, 2016, which included $18.4 million of acquired loans from the Merger. The following table summarizes average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented: For the Three Months Ended September 30, 2017 September 30, 2016 (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With a related allowance recorded: Commercial real estate $ — $ — $ — $ — Commercial and industrial 2,406 37 2,437 37 Commercial construction — — — — Consumer real estate 23 1 28 — Other consumer 32 2 2 — Total with a Related Allowance Recorded 2,461 40 2,467 37 Without a related allowance recorded: Commercial real estate 6,415 105 7,582 38 Commercial and industrial 9,074 130 7,326 52 Commercial construction 7,140 154 8,039 49 Consumer real estate 11,149 250 11,686 159 Other consumer 28 — 32 — Total without a Related Allowance Recorded 33,806 639 34,665 298 Total: Commercial real estate 6,415 105 7,582 38 Commercial and industrial 11,480 167 9,763 89 Commercial construction 7,140 154 8,039 49 Consumer real estate 11,172 251 11,714 159 Other consumer 60 2 34 — Total $ 36,267 $ 679 $ 37,132 $ 335 Nine Months Ended September 30, 2017 September 30, 2016 (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With a related allowance recorded: Commercial real estate $ — $ — $ — $ — Commercial and industrial 1,218 44 2,492 100 Commercial construction — — — — Consumer real estate 24 1 29 2 Other consumer 35 1 2 — Total with a Related Allowance Recorded 1,277 46 2,523 102 Without a related allowance recorded: Commercial real estate 6,577 140 7,551 106 Commercial and industrial 11,001 164 7,447 156 Commercial construction 7,222 194 8,498 143 Consumer real estate 11,488 382 11,831 400 Other consumer 33 1 38 1 Total without a Related Allowance Recorded 36,321 881 35,365 806 Total: Commercial real estate 6,577 140 7,551 106 Commercial and industrial 12,219 208 9,939 256 Commercial construction 7,222 194 8,498 143 Consumer real estate 11,512 383 11,860 402 Other consumer 68 2 40 1 Total $ 37,598 $ 927 $ 37,888 $ 908 The following tables detail activity in the ALL for the periods presented: Three Months Ended September 30, 2017 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 24,358 $ 9,256 $ 13,944 $ 5,803 $ 1,990 $ 55,351 Charge-offs (37 ) (644 ) (1,453 ) (101 ) (425 ) (2,660 ) Recoveries 182 243 473 91 182 1,171 Net (Charge-offs)/ Recoveries 145 (401 ) (980 ) (10 ) (243 ) (1,489 ) Provision for loan losses 472 859 1,951 (262 ) (170 ) 2,850 Balance at End of Period $ 24,975 $ 9,714 $ 14,915 $ 5,531 $ 1,577 $ 56,712 Three Months Ended September 30, 2016 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 15,978 $ 14,771 $ 11,701 $ 8,418 $ 1,345 $ 52,213 Charge-offs (93 ) (414 ) (163 ) (369 ) (461 ) (1,500 ) Recoveries 264 169 17 44 70 564 Net (Charge-offs)/ Recoveries 171 (245 ) (146 ) (325 ) (391 ) (936 ) Provision for loan losses 4,244 (2,232 ) 1,356 (1,760 ) 908 2,516 Balance at End of Period $ 20,393 $ 12,294 $ 12,911 $ 6,333 $ 1,862 $ 53,793 Nine Months Ended September 30, 2017 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 19,976 $ 10,810 $ 13,999 $ 6,095 $ 1,895 $ 52,775 Charge-offs (2,100 ) (4,041 ) (2,097 ) (1,957 ) (1,228 ) (11,423 ) Recoveries 415 499 842 270 433 2,459 Net (Charge-offs)/Recoveries (1,685 ) (3,542 ) (1,255 ) (1,687 ) (795 ) (8,964 ) Provision for loan losses 6,684 2,446 2,171 1,123 477 12,901 Balance at End of Period $ 24,975 $ 9,714 $ 14,915 $ 5,531 $ 1,577 $ 56,712 Nine Months Ended September 30, 2016 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 15,043 $ 10,853 $ 12,625 $ 8,400 $ 1,226 $ 48,147 Charge-offs (1,808 ) (3,244 ) (1,108 ) (891 ) (1,572 ) (8,623 ) Recoveries 662 589 20 342 277 1,890 Net (Charge-offs)/Recoveries (1,146 ) (2,655 ) (1,088 ) (549 ) (1,295 ) (6,733 ) Provision for loan losses 6,496 4,096 1,374 (1,518 ) 1,931 12,379 Balance at End of Period $ 20,393 $ 12,294 $ 12,911 $ 6,333 $ 1,862 $ 53,793 The following tables present the ALL and recorded investments in loans by category as of the periods presented: September 30, 2017 Allowance for Loan Losses Portfolio Loans (dollars in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial real estate $ — $ 24,975 $ 24,975 $ 6,341 $ 2,675,352 $ 2,681,693 Commercial and industrial 260 9,454 9,714 8,543 1,438,268 1,446,811 Commercial construction — 14,915 14,915 5,974 426,913 432,887 Consumer real estate 22 5,509 5,531 11,076 1,178,647 1,189,723 Other consumer 30 1,547 1,577 54 69,590 69,644 Total $ 312 $ 56,400 $ 56,712 $ 31,988 $ 5,788,770 $ 5,820,758 December 31, 2016 Allowance for Loan Losses Portfolio Loans (dollars in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial real estate $ — $ 19,976 $ 19,976 $ 16,352 $ 2,482,124 $ 2,498,476 Commercial and industrial 771 10,039 10,810 6,866 1,394,169 1,401,035 Commercial construction — 13,999 13,999 6,613 449,271 455,884 Consumer real estate 26 6,069 6,095 12,079 1,178,093 1,190,172 Other consumer 1 1,894 1,895 25 65,827 65,852 Total $ 798 $ 51,977 $ 52,775 $ 41,935 $ 5,569,484 $ 5,611,419

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	Interest Rate Swaps In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on the same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates. Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial. Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Comprehensive Income. Interest Rate Lock Commitments and Forward Sale Contracts In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We may encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Comprehensive Income. The following table indicates the amounts representing the value of derivative assets and derivative liabilities as of the dates presented: Derivatives (included in Other Assets) Derivatives (included in Other Liabilities) (dollars in thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Derivatives not Designated as Hedging Instruments: Interest Rate Swap Contracts- Commercial Loans Fair value $ 4,814 $ 6,960 $ 4,786 $ 6,958 Notional amount 209,572 232,396 209,572 232,396 Collateral posted — — 3,046 14,340 Interest Rate Lock Commitments- Mortgage Loans Fair value 452 236 — — Notional amount 13,939 8,490 — — Forward Sale Contracts- Mortgage Loans Fair value — — 16 27 Notional amount $ — $ — $ 14,564 $ 8,216 Presenting offsetting derivatives that are subject to legally enforceable netting arrangements with the same party is permitted. For example, we may have a derivative asset as well as a derivative liability with the same counterparty to a swap transaction and are permitted to offset the asset position and the liability position resulting in a net presentation. The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets as of the dates presented: Derivatives (included in Other Assets) Derivatives (included in Other Liabilities) (dollars in thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Derivatives not Designated as Hedging Instruments: Gross amounts recognized $ 6,124 $ 8,590 $ 6,096 $ 8,588 Gross amounts offset (1,310 ) (1,630 ) (1,310 ) (1,630 ) Net amounts presented in the Consolidated Balance Sheets 4,814 6,960 4,786 6,958 Gross amounts not offset (1) — — (3,505 ) (14,340 ) Net Amount $ 4,814 $ 6,960 $ 1,281 $ (7,382 ) (1) Amounts represent posted collateral. The following table indicates the gain or loss recognized in income on derivatives for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2017 2016 2017 2016 Derivatives not Designated as Hedging Instruments Interest rate swap contracts—commercial loans $ 9 $ (87 ) $ 25 $ 34 Interest rate lock commitments—mortgage loans (4 ) 97 216 478 Forward sale contracts—mortgage loans (30 ) 106 10 (93 ) Total Derivatives (Loss)/Gain $ (25 ) $ 116 $ 251 $ 419

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
BORROWINGS	Short-term borrowings are for terms under or equal to one year and are comprised of securities sold under repurchase agreements, or REPOs, and Federal Home Loan Bank, or FHLB, advances. All REPOs are overnight short-term investments and are not insured by the Federal Deposit Insurance Corporation. Securities pledged as collateral under these REPO financing arrangements cannot be sold or repledged by the secured party and therefore, the REPOs are accounted for as a secured borrowing. Mortgage-backed securities with a total carrying value of $46.7 million at September 30, 2017 and $53.2 million at December 31, 2016 were pledged as collateral for these secured transactions. The pledged securities are held in safekeeping at the Federal Reserve. Due to the overnight short-term nature of REPOs, potential risk due to a decline in the value of the pledged collateral is low. Collateral pledging requirements with REPOs are monitored daily. FHLB advances are for various terms and are secured by a blanket lien on residential mortgages and other real estate secured loans. Long-term borrowings are for original terms greater than one year and are comprised of FHLB advances, a capital lease and junior subordinated debt securities. Long-term FHLB advances are secured by the same loans as short-term FHLB advances. We had total long-term borrowings outstanding of $9.7 million at a fixed rate and $3.1 million at a variable rate at September 30, 2017 , excluding our capital lease of $0.1 million . Information pertaining to borrowings is summarized in the table below as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Balance Weighted Average Rate Balance Weighted Average Rate Short-term borrowings Securities sold under repurchase agreements $ 39,923 0.16 % $ 50,832 0.01 % Short-term borrowings 685,000 1.31 % 660,000 0.76 % Total short-term borrowings 724,923 1.25 % 710,832 0.70 % Long-term borrowings Other long-term borrowings 12,911 2.97 % 14,713 2.91 % Junior subordinated debt securities 45,619 3.74 % 45,619 3.42 % Total long-term borrowings 58,530 3.57 % 60,332 3.30 % Total Borrowings $ 783,453 1.42 % $ 771,164 0.90 % We had total borrowings at September 30, 2017 and December 31, 2016 at the FHLB of Pittsburgh of $698 million and $675 million . The $698 million at September 30, 2017 consisted of $685 million in short-term borrowings and $12.9 million in long-term borrowings. Our maximum borrowing capacity with the FHLB of Pittsburgh was $2.5 billion at September 30, 2017 . We utilized $902 million of our borrowing capacity at September 30, 2017 consisting of $698 million for borrowings and $204 million for letters of credit to collateralize public funds. Our remaining borrowing availability at September 30, 2017 is $1.6 billion .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	Commitments In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Our allowance for unfunded commitments totaled $2.1 million at September 30, 2017 and $2.6 million at December 31, 2016 . The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets. The allowance for unfunded commitments is determined using a similar methodology as our ALL methodology. The reserve is calculated by applying historical loss rates and qualitative adjustments to our unfunded commitments. Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties. The following table sets forth our commitments and letters of credit as of the dates presented: (dollars in thousands) September 30, 2017 December 31, 2016 Commitments to extend credit $ 1,421,906 $ 1,509,696 Standby letters of credit 85,389 84,534 Total $ 1,507,295 $ 1,594,230 Litigation In the normal course of business, we are subject to various legal and administrative proceedings and claims. While any type of litigation contains a level of uncertainty, we believe that no outcome of any such proceedings or claims pending will have a material adverse effect on our consolidated financial position or results of operations.

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
OTHER COMPREHENSIVE INCOME	The following table presents the change in components of other comprehensive income (loss) for the periods presented, net of tax effects. Three Months Ended September 30, 2017 Three months ended September 30, 2016 (dollars in thousands) Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Change in net unrealized gains/(losses) on securities available-for-sale $ (148 ) $ 52 $ (96 ) $ (1,921 ) $ 672 $ (1,249 ) Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income (1) — — — — — — Adjustment to funded status of employee benefit plans 539 (189 ) 350 544 (190 ) 354 Other Comprehensive Income/(Loss) $ 391 $ (137 ) $ 254 $ (1,377 ) $ 482 $ (895 ) (1) Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statements of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income. Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (dollars in thousands) Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Change in net unrealized gains/(losses) on securities available-for-sale $ 4,186 $ (1,470 ) $ 2,716 $ 11,748 $ (4,112 ) $ 7,636 Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income (1) (3,987 ) 1,400 (2,587 ) — — — Adjustment to funded status of employee benefit plans 1,617 (566 ) 1,051 4,889 (1,711 ) 3,178 Other Comprehensive Income $ 1,816 $ (636 ) $ 1,180 $ 16,637 $ (5,823 ) $ 10,814 (1) Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statement of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
EMPLOYEE BENEFITS	Effective March 31, 2016, our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plan. We recorded a curtailment gain for the three months ended March 31, 2016 resulting from the amendment. The curtailment gain was $1.0 million and represented the unrecognized benefits associated with prior plan amendments that would have been amortized into income over the next seven years . The qualified plan was previously closed to new participants effective December 31, 2007. We will continue recording pension expense related to this plan, primarily representing interest costs on the accumulated benefit obligation and amortization of actuarial losses accumulated in the plan, as well as income from expected investment returns on pension assets. Prior to March 31, 2016, the accrued benefits were based on years of service and the employee’s compensation for the highest five consecutive years in the last ten years . Contributions were intended to provide for benefits attributed to employee service to date and for those benefits expected to be earned in the future. The expected long-term rate of return on plan assets is 7.50 percent . The following table summarizes the components of net periodic pension cost for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2017 2016 2017 2016 Components of Net Periodic Pension Cost Service cost—benefits earned during the period $ — $ (6 ) $ — $ 469 Interest cost on projected benefit obligation 1,025 1,099 3,075 3,200 Expected return on plan assets (1,582 ) (1,444 ) (4,746 ) (4,337 ) Amortization of prior service credit 475 29 1,424 (41 ) Recognized net actuarial loss — 638 — 1,708 Net Periodic Pension Expense $ (82 ) $ 316 $ (247 ) $ 999

Qualified Affordable Housing Pr

Qualified Affordable Housing Projects	9 Months Ended
	Sep. 30, 2017
Investments in Affordable Housing Projects [Abstract]
QUALIFIED AFFORDABLE HOUSING PROJECTS	QUALIFIED AFFORDABLE HOUSING PROJECTS We invest in affordable housing projects primarily to help satisfy our Community Reinvestment Act requirements. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. We use the cost method to account for these partnerships. Our total investment in qualified affordable housing projects was $10.0 million at September 30, 2017 and $11.7 million at December 31, 2016 . We had no open commitments to fund current or future investments in qualified affordable housing projects at September 30, 2017 or December 31, 2016 . Amortization expense, included in other noninterest expense in the Consolidated Statements of Comprehensive Income, was $0.8 million for the three months ended September 30, 2017 and 2016 and $2.3 million and $2.5 million for the nine months ended September 30, 2017 and 2016. The amortization expense was offset by tax credits of $0.9 million and $2.6 million for the three and nine months ended September 30, 2017 and $0.9 million and $2.7 million for the three and nine months ended September 30, 2016 as a reduction to our federal tax provision.

Sale of Retail Branch Office

Sale of Retail Branch Office	9 Months Ended
	Sep. 30, 2017
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
SALE OF RETAIL BRANCH OFFICE	SALE OF RETAIL BRANCH OFFICE On July 27, 2017, we entered into a definitive agreement to sell our State College retail branch office to First Citizens Community Bank, a wholly owned subsidiary of Citizens Financial Services, Inc. The retail branch office will remain open for business throughout the transition and will continue to offer all products and services to customers. The all-cash transaction is expected to close in the fourth quarter of 2017, subject to regulatory approvals and other customary closing conditions. At September 30, 2017, $43.4 million of loans and $39.0 million of deposits were held for sale related to this transaction.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The interim Consolidated Financial Statements include the accounts of S&T Bancorp, Inc., or S&T, and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting.
Basis of Presentation	Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements of S&T have been prepared in accordance with generally accepted accounting principles, or GAAP, in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements included in our annual report on Form 10-K for the year ended December 31, 2016 , filed with the Securities and Exchange Commission, or SEC, on February 24, 2017. In the opinion of management, the accompanying interim financial information reflects all adjustments, consisting of normal recurring adjustments, necessary to present fairly our financial position and the results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year or any future period.
Reclassification	Reclassification A mounts in prior period financial statements and footnotes are reclassified whenever necessary to conform to the current period presentation. Reclassifications had no effect on our results of operations or financial condition.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Recently Adopted Accounting Standards Updates, or ASU or Update	Recently Adopted Accounting Standards Updates, or ASU or Update Stock Compensation - Improvements to Employee Share-Based Payment Accounting On March 31, 2016 the Financial Accounting Standards Board, or FASB, issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to improve the accounting for share-based payment transactions as part of the FASB's simplification initiative. The ASU changes seven aspects of the accounting for share-based payment award transactions, including: 1. accounting for income taxes; 2. classification of excess tax benefits on the statement of cash flows; 3. forfeitures; 4. minimum statutory tax withholding requirements; 5. classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes; 6. practical expedient - expected term (nonpublic only); and 7. intrinsic value (nonpublic only). This ASU is effective for fiscal years beginning after December 15, 2016 and interim periods within those years for public business entities. The adoption of this ASU had no material impact on our results of operations or financial position. Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting, which eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2016. The amendments will be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The adoption of this ASU had no impact on our results of operations or financial position. Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities. The amendments in this ASU affect all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date. This ASU shortens the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount, which continues to be amortized to maturity. This Update is effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. We have early adopted the provisions of this ASU and it had no impact on our results of operations or financial position. Recently Issued Accounting Standards Updates not yet Adopted Compensation - Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post Retirement Benefit Costs In March 2017, the FASB issued ASU No. 2017-07, Compensation Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post Retirement Benefit Costs (Topic 715). The main objective of this ASU is to provide financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. Effective March 31, 2016, our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plan; as such, the provisions of this ASU will have no impact on our results of operations and financial position. Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Assets Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets In February 2017, the FASB issued ASU No. 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20). The main objective in this ASU is intended to provide greater detail on what types of transactions should be accounted for as partial sales of nonfinancial assets. The scope of this ASU, as originally issued in ASU No. 2014-09 (described below), is intended to reduce the complexity of current GAAP requirements by clarifying which accounting guidance applies to various types of contracts that transfer assets or ownership interest to another entity. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017 and at the same time that ASU No. 2014-09 is effective. Early adoption is permitted, but only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The provisions of this ASU will not materially impact our results of operations and financial position. Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment (Topic 350). The main objective in this ASU is intended to simplify the current requirements for testing goodwill for impairment by eliminating step two from the goodwill impairment test. The amendments are expected to reduce the complexity and costs associated with performing the goodwill impairment test, which could result in recording impairment charges sooner than under the current guidance. This Update is effective for any interim and annual impairment tests in reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position. Business Combinations - Clarifying the Definition of a Business In January 2017, the FASB issued ASU No. 2017-01, Business Combinations - Clarifying the Definition of a Business (Topic 805). The main objective of this ASU is to help financial statement preparers evaluate whether a set of transferred assets and activities (either acquired or disposed of) is a business under Topic 805, Business Combinations by changing the definition of a business. The revised definition will result in fewer acquisitions being accounted for as business combinations than under existing guidance. The definition of a business is significant because it affects the accounting for acquisitions, the identification of reporting units, consolidation evaluations and the accounting for dispositions. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted for transactions not yet reflected in financial statements that have been issued or made available for issuance. The provisions of this ASU will have no impact on our results of operations and financial position. Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory In October 2016, the FASB issued ASU No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory. The main objective of this ASU is to require companies to recognize the income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. This represents a change from existing guidance, which requires companies to defer the income tax effects of intercompany transfers of assets until the asset has been sold to an outside party or otherwise recognized. The new guidance will require companies to defer the income tax effects only of intercompany transfers of inventory. This Update is effective for annual periods beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period. If an entity chooses to early adopt the amendments in the ASU, it must do so in the first interim period of its annual financial statements. That is, an entity cannot adopt the amendments in the ASU in a later interim period and apply them as if they were in effect as of the beginning of the year. The provisions of this ASU will have no impact on our results of operations and financial position. Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The provisions of this ASU will not materially impact our results of operations and financial position. Financial Instruments - Credit Losses In June 2016, the FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments of this Update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The collective changes to the recognition and measurement accounting standards for financial instruments and their anticipated impact on the allowance for credit losses modeling have been universally referred to as the CECL, or current expected credit loss, model. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are evaluating the provisions of this ASU to determine the potential impact on our results of operations and financial position. Revenue from Contracts with Customers In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are: 1. identify the contract with the customer; 2. identify the separate performance obligations in the contract; 3. determine the transaction price; 4. allocate the transaction price to the separate performance obligations; and 5. recognize revenue when each performance obligation is satisfied. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date. This ASU defers the effective date of ASU No. 2014-09 for all entities by one year. In March 2016, the FASB issued ASU No. 2016-08, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers, by reducing: 1. The potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis. In April 2016, the FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing, as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers, by reducing: 1. The potential for diversity in practice at initial application, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis. In May 2016, the FASB issued ASU No. 2016-12, Narrow-scope Improvements and Practical Expedients. The amendments in this ASU do not change the core principles of Topic 606, Revenue from Contracts with Customers. These amendments affect only the narrow aspects of Topic 606: 1. Collectibility Criterion, 2. Presentation of Sales Taxes and Other Similar Taxes Collected from Customers, 3. Noncash Consideration, 4. Contract Modifications at Transition, and 5. Completed Contracts at Transition. ASU 2014-09, including transition requirements for all amendments, is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. Our revenue is comprised of net interest income, which is excluded from the scope of ASU 2014-09, and noninterest income. We are substantially complete with our overall assessment of revenue streams and reviewing of related contracts potentially affected by the ASU, including trust and asset management fees, deposit related fees, interchange fees, merchant income and annuity and insurance commissions. Our assessment suggests that adoption of this ASU should not materially change the method in which we currently recognize revenue for these revenue streams. We are also substantially complete with our evaluation of certain costs related to these revenue streams to determine whether such costs should be presented as expenses or contra-revenue. In addition, we are evaluating the ASU’s expanded disclosure requirements. We plan to adopt ASU No. 2014-09 on January 1, 2018 utilizing the modified retrospective approach with a cumulative effect adjustment to opening retained earnings, if such adjustment is deemed to be material. Leases - Section A-Amendments to the FASB Accounting Standards Codification, Section B-Conforming Amendments Related to Leases and Section C-Background Information and Basis for Conclusions In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires lessees to recognize a right-to-use asset and a lease obligation for all leases on the balance sheet. Lessor accounting remains substantially similar to current GAAP. ASU 2016-02 supersedes Topic 840, Leases. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2018. ASU 2016-02 mandates a modified retrospective transition method for all entities. Early adoption of this ASU is permitted. We anticipate that this ASU will impact our financial statements as it relates to the recognition of right-to-use assets and lease obligations on our Consolidated Balance Sheet. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position. Accounting for Financial Instruments - Overall: Classification and Measurement In January 2016, the FASB issued ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement (Subtopic 825-10). The amendments in this ASU address the following: 1. require equity investments to be measured at fair value with changes in fair value recognized in net income; 2. simplify the impairment assessment of equity investments without readily-determinable fair values by requiring a qualitative assessment to identify impairment; 3. eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4. require entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5. require separate presentation in other comprehensive income for the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6. require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements; and 7. clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2017. The provisions of this ASU will not materially impact our results of operations and financial position.
Fair Value Measurements	We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivative financial instruments are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, and other repossessed assets, mortgage servicing rights, or MSRs, and certain other assets. Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed based on market data that we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances. The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows: Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets. Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data. Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred. The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis. Recurring Basis Securities Available-for-Sale Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our debt securities. The market valuation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models and vast descriptive terms and conditions databases, as well as extensive quality control programs. Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2. Marketable equity securities that are not readily traded and do not have a quotable market are classified as Level 3. Trading Assets We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Rabbi Trust assets are reported in other assets in the Consolidated Balance Sheets. Derivative Financial Instruments We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparties' nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings. Nonrecurring Basis Loans Held for Sale Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3. Impaired Loans Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish specific reserves based on the following three impairment methods: 1. the present value of expected future cash flows discounted at the loan’s original effective interest rate; 2. the loan’s observable market price; or 3. the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraisals may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3. OREO and Other Repossessed Assets OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3. Mortgage Servicing Rights The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Comprehensive Income. Other Assets We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above. Financial Instruments In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments. Cash and Cash Equivalents The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value. Loans The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is the carrying value less any specific reserve on the loan if it is impaired. The carrying amount of accrued interest approximates fair value. Bank Owned Life Insurance Fair value approximates net cash surrender value of bank owned life insurance. Federal Home Loan Bank, or FHLB, and Other Restricted Stock It is not practical to determine the fair value of our FHLB and other restricted stock due to the restrictions placed on the transferability of these stocks; restricted stock is presented at carrying value. Deposits The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value. Short-Term Borrowings The carrying amounts of securities sold under repurchase agreements, or REPOs, and other short-term borrowings approximate their fair values. Long-Term Borrowings The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values. Junior Subordinated Debt Securities The interest rate on the variable rate junior subordinated debt securities is reset quarterly; therefore, the carrying values approximate their fair values. Loan Commitments and Standby Letters of Credit Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties. Other Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations.
Allowance for Loans Losses by Portfolio	We maintain an allowance for loan losses, or ALL, at a level determined to be adequate to absorb estimated probable credit losses inherent in the loan portfolio as of the balance sheet date. We develop and document a systematic ALL methodology based on the following portfolio segments: 1. CRE, 2. C&I, 3. Commercial Construction, 4. Consumer Real Estate and 5. Other Consumer. The following are key risks within each portfolio segment: CRE —Loans secured by commercial purpose real estate, including both owner occupied properties and investment properties, for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied. C&I —Loans made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often does not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt. Commercial Construction —Loans made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be completed, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer. Consumer Real Estate —Loans secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residential mortgages, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing market can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt. Other Consumer —Loans made to individuals that may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values. We further assess risk within each portfolio segment by pooling loans with similar risk characteristics. For the commercial loan classes, the most important indicator of risk is the internally assigned risk rating, including pass, special mention and substandard. Consumer loans are pooled by type of collateral, lien position and loan to value, or LTV, for Consumer Real Estate loans. Historical loss rates are applied to these loan pools to determine the reserve for loans collectively evaluated for impairment. The ALL methodology for groups of loans collectively evaluated for impairment is comprised of both a quantitative and qualitative analysis. A key assumption in the quantitative component of the reserve is the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates. Management monitors various credit quality indicators for both the commercial and consumer loan portfolios, including delinquency, nonperforming status and changes in risk ratings on a monthly basis.
Loans Credit Risk Rating	We continually monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans within the pass rating generally have a lower risk of loss than loans risk rated as special mention or substandard. Our risk ratings are consistent with regulatory guidance and are as follows: Pass —The loan is currently performing and is of high quality. Special Mention —A special mention loan has potential weaknesses that warrant management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects or in the strength of our credit position at some future date. Economic and market conditions, beyond the borrower’s control, may in the future necessitate this classification. Substandard —A substandard loan is not adequately protected by the net worth and/or paying capacity of the borrower or by the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. These loans are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected.
Derivative Financial Instruments	Interest Rate Swaps In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on the same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates. Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial. Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Comprehensive Income. Interest Rate Lock Commitments and Forward Sale Contracts In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We may encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Comprehensive Income.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Reconciles Numerators and Denominators of Basic Earnings Per Share with Diluted Earnings Per Share	The following table reconciles the numerators and denominators of basic and diluted earnings per share for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except shares and per share data) 2017 2016 2017 2016 Numerator for Earnings per Share—Basic: Net income $ 22,721 $ 20,581 $ 63,674 $ 53,733 Less: Income allocated to participating shares 73 68 214 167 Net Income Allocated to Shareholders $ 22,648 $ 20,513 $ 63,460 $ 53,566 Numerator for Earnings per Share—Diluted: Net income $ 22,721 $ 20,581 $ 63,674 $ 53,733 Net Income Available to Shareholders $ 22,721 $ 20,581 $ 63,674 $ 53,733 Denominators for Earnings per Share: Weighted Average Shares Outstanding—Basic 34,751,266 34,687,487 34,722,370 34,674,453 Add: Potentially dilutive shares 208,873 81,018 208,139 72,724 Denominator for Treasury Stock Method—Diluted 34,960,139 34,768,505 34,930,509 34,747,177 Weighted Average Shares Outstanding—Basic 34,751,266 34,687,487 34,722,370 34,674,453 Add: Average participating shares outstanding 111,821 114,746 116,969 108,414 Denominator for Two-Class Method—Diluted 34,863,087 34,802,233 34,839,339 34,782,867 Earnings per share—basic $ 0.65 $ 0.59 $ 1.83 $ 1.55 Earnings per share—diluted $ 0.65 $ 0.59 $ 1.82 $ 1.54 Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019 443,575 517,012 452,188 517,012 Restricted stock considered anti-dilutive excluded from potentially dilutive shares 92,577 146,695 95,707 134,983

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at September 30, 2017 and December 31, 2016 . There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented. September 30, 2017 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Securities available-for-sale: U.S. Treasury securities $ — $ 24,894 $ — $ 24,894 Obligations of U.S. government corporations and agencies — 196,008 — 196,008 Collateralized mortgage obligations of U.S. government corporations and agencies — 114,895 — 114,895 Residential mortgage-backed securities of U.S. government corporations and agencies — 35,197 — 35,197 Commercial mortgage-backed securities of U.S. government corporations and agencies — 192,604 — 192,604 Obligations of states and political subdivisions — 129,304 — 129,304 Marketable equity securities — 5,052 — 5,052 Total securities available-for-sale — 697,954 — 697,954 Trading securities held in a Rabbi Trust 5,039 — — 5,039 Total securities 5,039 697,954 — 702,993 Derivative financial assets: Interest rate swap contracts - commercial loans — 4,814 — 4,814 Interest rate lock commitments - mortgage loans — 452 — 452 Total Assets $ 5,039 $ 703,220 $ — $ 708,259 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 4,786 $ — $ 4,786 Forward sale contracts - mortgage loans — 16 — 16 Total Liabilities $ — $ 4,802 $ — $ 4,802 December 31, 2016 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Securities available-for-sale: U.S. Treasury securities $ — $ 24,811 $ — $ 24,811 Obligations of U.S. government corporations and agencies — 232,179 — 232,179 Collateralized mortgage obligations of U.S. government corporations and agencies — 129,777 — 129,777 Residential mortgage-backed securities of U.S. government corporations and agencies — 37,358 — 37,358 Commercial mortgage-backed securities of U.S. government corporations and agencies — 125,604 — 125,604 Obligations of states and political subdivisions — 132,509 — 132,509 Marketable equity securities — 11,249 — 11,249 Total securities available-for-sale — 693,487 — 693,487 Trading securities held in a Rabbi Trust 4,410 — — 4,410 Total securities 4,410 693,487 — 697,897 Derivative financial assets: Interest rate swap contracts - commercial loans — 6,960 — 6,960 Interest rate lock commitments - mortgage loans — 236 — 236 Total Assets $ 4,410 $ 700,683 $ — $ 705,093 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 6,958 $ — $ 6,958 Forward sale contracts - mortgage loans — 27 — 27 Total Liabilities $ — $ 6,985 $ — $ 6,985
Assets Measured at Estimated Fair Value on Nonrecurring Basis by Fair Value Hierarchy	The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS (1) Loans held for sale $ — $ — $ — $ — $ — $ — $ 1,802 $ 1,802 Impaired loans — — 11,407 11,407 — — 10,329 10,329 Other real estate owned — — 718 718 — — 396 396 Mortgage servicing rights — — 481 481 — — 538 538 Total Assets $ — $ — $ 12,606 $ 12,606 $ — $ — $ 13,065 $ 13,065 (1) This table presents only the nonrecurring items that are recorded at fair value in our financial statements.
Carrying Values and Fair Values of Financial Instruments	The carrying values and fair values of our financial instruments at September 30, 2017 and December 31, 2016 are presented in the following tables: Carrying Value (1) Fair Value Measurements at September 30, 2017 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 114,440 $ 114,400 $ 114,400 $ — $ — Securities available-for-sale 697,954 697,954 — 697,954 — Loans held for sale 47,936 48,045 — — 48,045 Portfolio loans, net of unearned income 5,820,758 5,758,326 — — 5,758,326 Bank owned life insurance 71,639 71,639 — 71,639 — FHLB and other restricted stock 33,120 33,120 — — 33,120 Trading securities held in a Rabbi Trust 5,039 5,039 5,039 — — Mortgage servicing rights 3,992 4,286 — — 4,286 Interest rate swap contracts - commercial loans 4,814 4,814 — 4,814 — Interest rate lock commitments - mortgage loans 452 452 — 452 — LIABILITIES Deposits $ 5,443,240 $ 5,448,025 $ — $ — $ 5,448,025 Securities sold under repurchase agreements 39,923 39,923 — — 39,923 Short-term borrowings 685,000 685,000 — — 685,000 Long-term borrowings 12,911 13,318 — — 13,318 Junior subordinated debt securities 45,619 45,619 — — 45,619 Interest rate swap contracts - commercial loans 4,786 4,786 — 4,786 — Forward sale contracts - mortgage loans 16 16 — 16 — (1) As reported in the Consolidated Balance Sheets Carrying Value (1) Fair Value Measurements at December 31, 2016 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 139,486 $ 139,486 $ 139,486 $ — $ — Securities available-for-sale 693,487 693,487 — 693,487 — Loans held for sale 3,793 3,815 — — 3,815 Portfolio loans, net of unearned income 5,611,419 5,551,266 — — 5,551,266 Bank owned life insurance 72,081 72,081 — 72,081 — FHLB and other restricted stock 31,817 31,817 — — 31,817 Trading securities held in a Rabbi Trust 4,410 4,410 4,410 — — Mortgage servicing rights 3,744 4,098 — — 4,098 Interest rate swap contracts - commercial loans 6,960 6,960 — 6,960 — Interest rate lock commitments - mortgage loans 236 236 — 236 — LIABILITIES Deposits $ 5,272,377 $ 5,276,499 $ — $ — $ 5,276,499 Securities sold under repurchase agreements 50,832 50,832 — — 50,832 Short-term borrowings 660,000 660,000 — — 660,000 Long-term borrowings 14,713 15,267 — — 15,267 Junior subordinated debt securities 45,619 45,619 — — 45,619 Interest rate swap contracts - commercial loans 6,958 6,958 — 6,958 — Forward sale contracts - mortgage loans 27 27 — 27 — (1) As reported in the Consolidated Balance Sheets

Securities Available-for-Sale (

Securities Available-for-Sale (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Composition of Securities Available-for-Sale	The following table presents the amortized cost and fair value of available-for-sale securities as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. treasury securities $ 24,930 $ 2 $ (38 ) $ 24,894 $ 24,891 $ 47 $ (127 ) $ 24,811 Obligations of U.S. government corporations and agencies 195,194 1,171 (357 ) 196,008 230,989 1,573 (383 ) 232,179 Collateralized mortgage obligations of U.S. government corporations and agencies 115,027 476 (608 ) 114,895 130,046 465 (734 ) 129,777 Residential mortgage-backed securities of U.S. government corporations and agencies 34,452 896 (151 ) 35,197 36,606 984 (232 ) 37,358 Commercial mortgage-backed securities of U.S. government corporations and agencies 193,382 511 (1,289 ) 192,604 127,311 243 (1,950 ) 125,604 Obligations of states and political subdivisions 123,672 5,632 — 129,304 128,783 3,772 (46 ) 132,509 Debt Securities 686,657 8,688 (2,443 ) 692,902 678,626 7,084 (3,472 ) 682,238 Marketable equity securities 3,815 1,237 — 5,052 7,579 3,670 — 11,249 Total $ 690,472 $ 9,925 $ (2,443 ) $ 697,954 $ 686,205 $ 10,754 $ (3,472 ) $ 693,487
Fair Value and Age of Gross Unrealized Losses by Investment Category	The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented: September 30, 2017 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 2 $ 14,903 $ (38 ) — $ — $ — 2 $ 14,903 $ (38 ) Obligations of U.S. government corporations and agencies 8 72,102 (357 ) — — — 8 72,102 (357 ) Collateralized mortgage obligations of U.S. government corporations and agencies 8 62,408 (608 ) — — — 8 62,408 (608 ) Residential mortgage-backed securities of U.S. government corporations and agencies 2 9,071 (151 ) — — — 2 9,071 (151 ) Commercial mortgage-backed securities of U.S. government corporations and agencies 10 100,322 (1,057 ) 1 7,586 (232 ) 11 107,908 (1,289 ) Obligations of states and political subdivisions — — — — — — — — — Debt Securities 30 258,806 (2,211 ) 1 7,586 (232 ) 31 266,392 (2,443 ) Marketable equity securities — — — — — — — — — Total Temporarily Impaired Securities 30 $ 258,806 $ (2,211 ) 1 $ 7,586 $ (232 ) 31 $ 266,392 $ (2,443 ) December 31, 2016 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 1 $ 9,811 $ (127 ) — $ — $ — 1 $ 9,811 $ (127 ) Obligations of U.S. government corporations and agencies 7 62,483 (383 ) — — — 7 62,483 (383 ) Collateralized mortgage obligations of U.S. government corporations and agencies 10 83,031 (734 ) — — — 10 83,031 (734 ) Residential mortgage-backed securities of U.S. government corporations and agencies 2 10,022 (232 ) — — — 2 10,022 (232 ) Commercial mortgage-backed securities of U.S. government corporations and agencies 10 96,576 (1,950 ) — — — 10 96,576 (1,950 ) Obligations of states and political subdivisions 1 5,577 (46 ) — — — 1 5,577 (46 ) Debt Securities 31 267,500 (3,472 ) — — — 31 267,500 (3,472 ) Marketable equity securities — — — — — — — — — Total Temporarily Impaired Securities 31 $ 267,500 $ (3,472 ) — $ — $ — 31 $ 267,500 $ (3,472 )
Unrealized Gains and Losses, Net of Tax on Securities Available for Sale	The following table displays net unrealized gains and losses, net of tax, on securities available for sale included in accumulated other comprehensive (loss)/income, for the periods presented: September 30, 2017 December 31, 2016 (dollars in thousands) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Gains/ (Losses) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Gains/ (Losses) Total unrealized gains/(losses) on securities available-for-sale $ 9,925 $ (2,443 ) $ 7,482 $ 10,754 $ (3,472 ) $ 7,282 Income tax expense/(benefit) (3,485 ) 858 (2,627 ) (3,776 ) 1,219 (2,557 ) Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss) $ 6,440 $ (1,585 ) $ 4,855 $ 6,978 $ (2,253 ) $ 4,725
Amortized Cost and Fair Value of Available-for-Sale Securities	The amortized cost and fair value of securities available-for-sale at September 30, 2017 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2017 (dollars in thousands) Amortized Cost Fair Value Obligations of the U.S. Treasury, U.S. government corporations and agencies, and obligations of states and political subdivisions Due in one year or less $ 63,576 $ 63,646 Due after one year through five years 177,864 180,087 Due after five years through ten years 56,875 58,890 Due after ten years 45,481 47,583 343,796 350,206 Collateralized mortgage obligations of U.S. government corporations and agencies 115,027 114,895 Residential mortgage-backed securities of U.S. government corporations and agencies 34,452 35,197 Commercial mortgage-backed securities of U.S. government corporations and agencies 193,382 192,604 Debt Securities 686,657 692,902 Marketable equity securities 3,815 5,052 Total $ 690,472 $ 697,954

Loans and Loans Held for Sale (

Loans and Loans Held for Sale (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Composition of Loans	The following table indicates the composition of loans as of the dates presented: (dollars in thousands) September 30, 2017 December 31, 2016 Commercial Commercial real estate $ 2,681,693 $ 2,498,476 Commercial and industrial 1,446,811 1,401,035 Commercial construction 432,887 455,884 Total Commercial Loans 4,561,391 4,355,395 Consumer Residential mortgage 697,367 701,982 Home equity 487,806 482,284 Installment and other consumer 69,644 65,852 Consumer construction 4,550 5,906 Total Consumer Loans 1,259,367 1,256,024 Total Portfolio Loans 5,820,758 5,611,419 Loans held for sale 47,936 3,793 Total Loans $ 5,868,694 $ 5,615,212
Restructured Loans for Periods Presented	The following table summarizes restructured loans as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Performing TDRs Nonperforming TDRs Total TDRs Performing TDRs Nonperforming TDRs Total TDRs Commercial real estate $ 2,618 $ 1,083 $ 3,701 $ 2,994 $ 646 $ 3,640 Commercial and industrial 4,063 3,580 7,643 1,387 4,493 5,880 Commercial construction 2,914 421 3,335 2,966 430 3,396 Residential mortgage 2,096 4,095 6,191 2,375 5,068 7,443 Home equity 3,871 1,013 4,884 3,683 954 4,637 Installment and other consumer 43 11 54 18 7 25 Total $ 15,605 $ 10,203 $ 25,808 $ 13,423 $ 11,598 $ 25,021 Three Months Ended September 30, 2017 Three months ended September 30, 2016 (dollars in thousands) Number of Loans Pre-Modification Outstanding Recorded Investment ( 1) Post-Modification Outstanding Recorded Investment (1) Total Difference in Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment (1) Post-Modification Outstanding Recorded Investment (1) Total Difference in Recorded Investment Commercial real estate Interest rate reduction — — — — 1 248 250 2 Maturity date extension 1 400 400 — — — — — Commercial and industrial Maturity date extension 1 274 816 542 2 4,105 4,162 57 Residential mortgage Chapter 7 bankruptcy(2) 1 148 — (148 ) 3 153 152 (1 ) Maturity date extension and interest rate reduction — — — — 1 280 280 — Home equity Chapter 7 bankruptcy(2) 4 72 70 (2 ) 7 163 161 (2 ) Installment and other consumer Chapter 7 bankruptcy(2) 8 200 185 (15 ) — — — — Total by Concession Type Chapter 7 bankruptcy(2) 13 420 255 (165 ) 10 316 313 (3 ) Interest rate reduction — — — — 1 248 250 2 Maturity date extension and interest rate reduction — — — — 1 280 280 — Maturity date extension 2 674 1,216 542 2 4,105 4,162 57 Total 15 $ 1,094 $ 1,471 $ 377 14 $ 4,949 $ 5,005 $ 56 (1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (dollars in thousands) Number of Pre-Modification (1) Post-Modification (1) Total Difference Number of Pre-Modification ( 1) Post-Modification (1) Total Difference Commercial real estate Principal deferral 1 $ 100 $ 100 $ — 1 $ 4,721 $ 2,270 $ (2,451 ) Chapter 7 bankruptcy (2) — — — — 1 709 681 (28 ) Interest rate reduction — — — — 1 250 248 (2 ) Maturity date extension 1 400 400 — — — — — Commercial and industrial Principal deferral 1 429 429 — 5 985 985 — Maturity Date extension and interest rate reduction 2 1,799 1,799 — — — — — Maturity date extension 1 274 816 542 5 4,860 4,891 31 Commercial Construction Maturity date extension — — — — 5 1,357 1,302 (55 ) Residential mortgage Principal deferral — — — — 1 3,273 3,273 — Chapter 7 bankruptcy (2) 2 181 32 (149 ) 7 439 433 (6 ) Maturity date extension — — — — 1 483 483 — Maturity date extension and interest rate reduction — — — — 1 280 280 — Home equity Principal deferral — — — — 1 47 46 (1 ) Chapter 7 bankruptcy (2) 13 380 375 (5 ) 16 481 470 (11 ) Maturity date extension and interest rate reduction 1 173 120 (53 ) 1 130 128 (2 ) Maturity date extension 1 231 231 — 4 274 272 (2 ) Installment and other consumer Chapter 7 bankruptcy (2) 10 237 220 (17 ) 2 16 13 (3 ) Total by Concession Type Principal deferral 2 529 529 — 8 9,026 6,574 (2,452 ) Chapter 7 bankruptcy (2) 25 798 627 (171 ) 26 1,645 1,597 (48 ) Interest rate reduction — — — — 1 250 248 (2 ) Maturity date extension and interest rate reduction 3 1,972 1,919 (53 ) 2 410 408 (2 ) Maturity date extension 3 905 1,447 542 15 6,974 6,948 (26 ) Total 33 $ 4,204 $ 4,522 $ 318 52 $ 18,305 $ 15,775 $ (2,530 ) (1) Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. (2) Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.
Summary of Nonperforming Assets	The following table is a summary of nonperforming assets as of the dates presented: Nonperforming Assets (dollars in thousands) September 30, 2017 December 31, 2016 Nonperforming Assets Nonaccrual loans $ 19,290 $ 31,037 Nonaccrual TDRs 10,203 11,598 Total nonaccrual loans 29,493 42,635 OREO 1,033 679 Total Nonperforming Assets $ 30,526 $ 43,314

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Age Analysis of Past Due Loans Segregated by Class of Loans	The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented: September 30, 2017 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due Nonaccrual Total Past Due Total Loans Commercial real estate $ 2,674,171 $ 530 $ 421 $ 6,571 $ 7,522 $ 2,681,693 Commercial and industrial 1,438,224 499 739 7,349 8,587 1,446,811 Commercial construction 428,744 75 — 4,068 4,143 432,887 Residential mortgage 684,848 3,872 865 7,782 12,519 697,367 Home equity 482,000 1,616 515 3,675 5,806 487,806 Installment and other consumer 69,316 228 52 48 328 69,644 Consumer construction 4,550 — — — — 4,550 Loans held for sale 47,936 — — — — 47,936 Total $ 5,829,789 $ 6,820 $ 2,592 $ 29,493 $ 38,905 $ 5,868,694 December 31, 2016 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due Nonaccrual Total Past Due Total Loans Commercial real estate $ 2,479,513 $ 2,032 $ 759 $ 16,172 $ 18,963 $ 2,498,476 Commercial and industrial 1,391,475 1,061 428 8,071 9,560 1,401,035 Commercial construction 450,410 547 — 4,927 5,474 455,884 Residential mortgage 689,635 1,312 1,117 9,918 12,347 701,982 Home equity 476,866 1,470 509 3,439 5,418 482,284 Installment and other consumer 65,525 176 43 108 327 65,852 Consumer construction 5,906 — — — — 5,906 Loans held for sale 3,793 — — — — 3,793 Total $ 5,563,123 $ 6,598 $ 2,856 $ 42,635 $ 52,089 $ 5,615,212
Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings	The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented: September 30, 2017 (dollars in thousands) Commercial Real Estate % of Total Commercial and Industrial % of Total Commercial Construction % of Total Total % of Total Pass $ 2,587,393 96.5 % $ 1,354,269 93.6 % $ 411,379 95.0 % $ 4,353,041 95.4 % Special mention 55,218 2.1 % 53,853 3.7 % 11,503 2.7 % 120,574 2.6 % Substandard 39,082 1.4 % 38,689 2.7 % 10,005 2.3 % 87,776 2.0 % Total $ 2,681,693 100.0 % $ 1,446,811 100.0 % $ 432,887 100.0 % $ 4,561,391 100.0 % December 31, 2016 (dollars in thousands) Commercial Real Estate % of Total Commercial and Industrial % of Total Commercial Construction % of Total Total % of Total Pass $ 2,423,742 97.0 % $ 1,315,507 93.9 % $ 430,472 94.4 % $ 4,169,721 95.7 % Special mention 33,098 1.3 % 40,409 2.9 % 14,691 3.2 % 88,198 2.0 % Substandard 41,636 1.7 % 45,119 3.2 % 10,721 2.4 % 97,476 2.3 % Total $ 2,498,476 100.0 % $ 1,401,035 100.0 % $ 455,884 100.0 % $ 4,355,395 100.0 %
Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status	The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented: September 30, 2017 (dollars in thousands) Residential Mortgage % of Total Home Equity % of Total Installment and other consumer % of Total Consumer Construction % of Total Total % of Total Performing $ 689,585 98.9 % $ 484,131 99.2 % $ 69,596 99.9 % $ 4,550 100.0 % $ 1,247,862 99.1 % Nonperforming 7,782 1.1 % 3,675 0.8 % 48 0.1 % — — % 11,505 0.9 % Total $ 697,367 100.0 % $ 487,806 100.0 % $ 69,644 100.0 % $ 4,550 100.0 % $ 1,259,367 100.0 % December 31, 2016 (dollars in thousands) Residential Mortgage % of Total Home Equity % of Total Installment and other consumer % of Total Consumer Construction % of Total Total % of Total Performing $ 692,064 98.6 % $ 478,845 99.3 % $ 65,744 99.8 % $ 5,906 100.0 % $ 1,242,559 98.9 % Nonperforming 9,918 1.4 % 3,439 0.7 % 108 0.2 % — — % 13,465 1.1 % Total $ 701,982 100.0 % $ 482,284 100.0 % $ 65,852 100.0 % $ 5,906 100.0 % $ 1,256,024 100.0 %
Investments in Loans Considered to be Impaired and Related Information on Impaired Loans	Nine Months Ended September 30, 2017 September 30, 2016 (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With a related allowance recorded: Commercial real estate $ — $ — $ — $ — Commercial and industrial 1,218 44 2,492 100 Commercial construction — — — — Consumer real estate 24 1 29 2 Other consumer 35 1 2 — Total with a Related Allowance Recorded 1,277 46 2,523 102 Without a related allowance recorded: Commercial real estate 6,577 140 7,551 106 Commercial and industrial 11,001 164 7,447 156 Commercial construction 7,222 194 8,498 143 Consumer real estate 11,488 382 11,831 400 Other consumer 33 1 38 1 Total without a Related Allowance Recorded 36,321 881 35,365 806 Total: Commercial real estate 6,577 140 7,551 106 Commercial and industrial 12,219 208 9,939 256 Commercial construction 7,222 194 8,498 143 Consumer real estate 11,512 383 11,860 402 Other consumer 68 2 40 1 Total $ 37,598 $ 927 $ 37,888 $ 908 The following table summarizes investments in loans considered to be impaired and related information on those impaired loans as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance Related Allowance With a related allowance recorded: Commercial real estate $ — $ — $ — $ — $ — $ — Commercial and industrial 2,468 2,501 260 964 2,433 771 Commercial construction — — — — — — Consumer real estate 22 22 22 26 26 26 Other consumer 30 30 30 1 1 1 Total with a Related Allowance Recorded 2,520 2,553 312 991 2,460 798 Without a related allowance recorded: Commercial real estate 6,341 6,985 — 16,352 17,654 — Commercial and industrial 6,075 8,245 — 5,902 7,699 — Commercial construction 5,974 8,629 — 6,613 10,306 — Consumer real estate 11,054 11,979 — 12,053 12,849 — Other consumer 24 30 — 24 31 — Total without a Related Allowance Recorded 29,468 35,868 — 40,944 48,539 — Total: Commercial real estate 6,341 6,985 — 16,352 17,654 — Commercial and industrial 8,543 10,746 260 6,866 10,132 771 Commercial construction 5,974 8,629 — 6,613 10,306 — Consumer real estate 11,076 12,001 22 12,079 12,875 26 Other consumer 54 60 30 25 32 1 Total $ 31,988 $ 38,421 $ 312 $ 41,935 $ 50,999 $ 798 The following table summarizes average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented: For the Three Months Ended September 30, 2017 September 30, 2016 (dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With a related allowance recorded: Commercial real estate $ — $ — $ — $ — Commercial and industrial 2,406 37 2,437 37 Commercial construction — — — — Consumer real estate 23 1 28 — Other consumer 32 2 2 — Total with a Related Allowance Recorded 2,461 40 2,467 37 Without a related allowance recorded: Commercial real estate 6,415 105 7,582 38 Commercial and industrial 9,074 130 7,326 52 Commercial construction 7,140 154 8,039 49 Consumer real estate 11,149 250 11,686 159 Other consumer 28 — 32 — Total without a Related Allowance Recorded 33,806 639 34,665 298 Total: Commercial real estate 6,415 105 7,582 38 Commercial and industrial 11,480 167 9,763 89 Commercial construction 7,140 154 8,039 49 Consumer real estate 11,172 251 11,714 159 Other consumer 60 2 34 — Total $ 36,267 $ 679 $ 37,132 $ 335
Summary of Allowance for Loan Losses	The following tables detail activity in the ALL for the periods presented: Three Months Ended September 30, 2017 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 24,358 $ 9,256 $ 13,944 $ 5,803 $ 1,990 $ 55,351 Charge-offs (37 ) (644 ) (1,453 ) (101 ) (425 ) (2,660 ) Recoveries 182 243 473 91 182 1,171 Net (Charge-offs)/ Recoveries 145 (401 ) (980 ) (10 ) (243 ) (1,489 ) Provision for loan losses 472 859 1,951 (262 ) (170 ) 2,850 Balance at End of Period $ 24,975 $ 9,714 $ 14,915 $ 5,531 $ 1,577 $ 56,712 Three Months Ended September 30, 2016 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 15,978 $ 14,771 $ 11,701 $ 8,418 $ 1,345 $ 52,213 Charge-offs (93 ) (414 ) (163 ) (369 ) (461 ) (1,500 ) Recoveries 264 169 17 44 70 564 Net (Charge-offs)/ Recoveries 171 (245 ) (146 ) (325 ) (391 ) (936 ) Provision for loan losses 4,244 (2,232 ) 1,356 (1,760 ) 908 2,516 Balance at End of Period $ 20,393 $ 12,294 $ 12,911 $ 6,333 $ 1,862 $ 53,793 Nine Months Ended September 30, 2017 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 19,976 $ 10,810 $ 13,999 $ 6,095 $ 1,895 $ 52,775 Charge-offs (2,100 ) (4,041 ) (2,097 ) (1,957 ) (1,228 ) (11,423 ) Recoveries 415 499 842 270 433 2,459 Net (Charge-offs)/Recoveries (1,685 ) (3,542 ) (1,255 ) (1,687 ) (795 ) (8,964 ) Provision for loan losses 6,684 2,446 2,171 1,123 477 12,901 Balance at End of Period $ 24,975 $ 9,714 $ 14,915 $ 5,531 $ 1,577 $ 56,712 Nine Months Ended September 30, 2016 (dollars in thousands) Commercial Real Estate Commercial and Industrial Commercial Construction Consumer Real Estate Other Consumer Total Loans Balance at beginning of period $ 15,043 $ 10,853 $ 12,625 $ 8,400 $ 1,226 $ 48,147 Charge-offs (1,808 ) (3,244 ) (1,108 ) (891 ) (1,572 ) (8,623 ) Recoveries 662 589 20 342 277 1,890 Net (Charge-offs)/Recoveries (1,146 ) (2,655 ) (1,088 ) (549 ) (1,295 ) (6,733 ) Provision for loan losses 6,496 4,096 1,374 (1,518 ) 1,931 12,379 Balance at End of Period $ 20,393 $ 12,294 $ 12,911 $ 6,333 $ 1,862 $ 53,793
Summary of Allowance for Loan Losses and Recorded Investments	The following tables present the ALL and recorded investments in loans by category as of the periods presented: September 30, 2017 Allowance for Loan Losses Portfolio Loans (dollars in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial real estate $ — $ 24,975 $ 24,975 $ 6,341 $ 2,675,352 $ 2,681,693 Commercial and industrial 260 9,454 9,714 8,543 1,438,268 1,446,811 Commercial construction — 14,915 14,915 5,974 426,913 432,887 Consumer real estate 22 5,509 5,531 11,076 1,178,647 1,189,723 Other consumer 30 1,547 1,577 54 69,590 69,644 Total $ 312 $ 56,400 $ 56,712 $ 31,988 $ 5,788,770 $ 5,820,758 December 31, 2016 Allowance for Loan Losses Portfolio Loans (dollars in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Individually Evaluated for Impairment Collectively Evaluated for Impairment Total Commercial real estate $ — $ 19,976 $ 19,976 $ 16,352 $ 2,482,124 $ 2,498,476 Commercial and industrial 771 10,039 10,810 6,866 1,394,169 1,401,035 Commercial construction — 13,999 13,999 6,613 449,271 455,884 Consumer real estate 26 6,069 6,095 12,079 1,178,093 1,190,172 Other consumer 1 1,894 1,895 25 65,827 65,852 Total $ 798 $ 51,977 $ 52,775 $ 41,935 $ 5,569,484 $ 5,611,419

Derivative Instruments and He27

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Value of Derivative Assets and Derivative Liabilities	The following table indicates the amounts representing the value of derivative assets and derivative liabilities as of the dates presented: Derivatives (included in Other Assets) Derivatives (included in Other Liabilities) (dollars in thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Derivatives not Designated as Hedging Instruments: Interest Rate Swap Contracts- Commercial Loans Fair value $ 4,814 $ 6,960 $ 4,786 $ 6,958 Notional amount 209,572 232,396 209,572 232,396 Collateral posted — — 3,046 14,340 Interest Rate Lock Commitments- Mortgage Loans Fair value 452 236 — — Notional amount 13,939 8,490 — — Forward Sale Contracts- Mortgage Loans Fair value — — 16 27 Notional amount $ — $ — $ 14,564 $ 8,216
Schedule of Offsetting Derivative Assets	The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets as of the dates presented: Derivatives (included in Other Assets) Derivatives (included in Other Liabilities) (dollars in thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Derivatives not Designated as Hedging Instruments: Gross amounts recognized $ 6,124 $ 8,590 $ 6,096 $ 8,588 Gross amounts offset (1,310 ) (1,630 ) (1,310 ) (1,630 ) Net amounts presented in the Consolidated Balance Sheets 4,814 6,960 4,786 6,958 Gross amounts not offset (1) — — (3,505 ) (14,340 ) Net Amount $ 4,814 $ 6,960 $ 1,281 $ (7,382 ) (1) Amounts represent posted collateral.
Schedule of Offsetting Liabilities	The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets as of the dates presented: Derivatives (included in Other Assets) Derivatives (included in Other Liabilities) (dollars in thousands) September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 Derivatives not Designated as Hedging Instruments: Gross amounts recognized $ 6,124 $ 8,590 $ 6,096 $ 8,588 Gross amounts offset (1,310 ) (1,630 ) (1,310 ) (1,630 ) Net amounts presented in the Consolidated Balance Sheets 4,814 6,960 4,786 6,958 Gross amounts not offset (1) — — (3,505 ) (14,340 ) Net Amount $ 4,814 $ 6,960 $ 1,281 $ (7,382 ) (1) Amounts represent posted collateral.
Amount of Gain or Loss Recognized in Income on Derivatives	The following table indicates the gain or loss recognized in income on derivatives for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2017 2016 2017 2016 Derivatives not Designated as Hedging Instruments Interest rate swap contracts—commercial loans $ 9 $ (87 ) $ 25 $ 34 Interest rate lock commitments—mortgage loans (4 ) 97 216 478 Forward sale contracts—mortgage loans (30 ) 106 10 (93 ) Total Derivatives (Loss)/Gain $ (25 ) $ 116 $ 251 $ 419

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Summary of Information Pertaining to Borrowings	Information pertaining to borrowings is summarized in the table below as of the dates presented: September 30, 2017 December 31, 2016 (dollars in thousands) Balance Weighted Average Rate Balance Weighted Average Rate Short-term borrowings Securities sold under repurchase agreements $ 39,923 0.16 % $ 50,832 0.01 % Short-term borrowings 685,000 1.31 % 660,000 0.76 % Total short-term borrowings 724,923 1.25 % 710,832 0.70 % Long-term borrowings Other long-term borrowings 12,911 2.97 % 14,713 2.91 % Junior subordinated debt securities 45,619 3.74 % 45,619 3.42 % Total long-term borrowings 58,530 3.57 % 60,332 3.30 % Total Borrowings $ 783,453 1.42 % $ 771,164 0.90 %

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Letters of Credit	The following table sets forth our commitments and letters of credit as of the dates presented: (dollars in thousands) September 30, 2017 December 31, 2016 Commitments to extend credit $ 1,421,906 $ 1,509,696 Standby letters of credit 85,389 84,534 Total $ 1,507,295 $ 1,594,230

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Tax Effects of Components of Other Comprehensive Income	The following table presents the change in components of other comprehensive income (loss) for the periods presented, net of tax effects. Three Months Ended September 30, 2017 Three months ended September 30, 2016 (dollars in thousands) Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Change in net unrealized gains/(losses) on securities available-for-sale $ (148 ) $ 52 $ (96 ) $ (1,921 ) $ 672 $ (1,249 ) Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income (1) — — — — — — Adjustment to funded status of employee benefit plans 539 (189 ) 350 544 (190 ) 354 Other Comprehensive Income/(Loss) $ 391 $ (137 ) $ 254 $ (1,377 ) $ 482 $ (895 ) (1) Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statements of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income. Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 (dollars in thousands) Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Pre-Tax Amount Tax (Expense) Benefit Net of Tax Amount Change in net unrealized gains/(losses) on securities available-for-sale $ 4,186 $ (1,470 ) $ 2,716 $ 11,748 $ (4,112 ) $ 7,636 Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income (1) (3,987 ) 1,400 (2,587 ) — — — Adjustment to funded status of employee benefit plans 1,617 (566 ) 1,051 4,889 (1,711 ) 3,178 Other Comprehensive Income $ 1,816 $ (636 ) $ 1,180 $ 16,637 $ (5,823 ) $ 10,814 (1) Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statement of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit	The following table summarizes the components of net periodic pension cost for the periods presented: Three Months Ended September 30, Nine Months Ended September 30, (dollars in thousands) 2017 2016 2017 2016 Components of Net Periodic Pension Cost Service cost—benefits earned during the period $ — $ (6 ) $ — $ 469 Interest cost on projected benefit obligation 1,025 1,099 3,075 3,200 Expected return on plan assets (1,582 ) (1,444 ) (4,746 ) (4,337 ) Amortization of prior service credit 475 29 1,424 (41 ) Recognized net actuarial loss — 638 — 1,708 Net Periodic Pension Expense $ (82 ) $ 316 $ (247 ) $ 999

Basis of Presentation Basis of

Basis of Presentation Basis of Presentation (Details) - segment	Jan. 01, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Number of reportable segments	0	3

Earnings Per Share - Reconciles

Earnings Per Share - Reconciles Numerators and Denominators of Basic Earnings Per Share with Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator for Earnings per Share-Basic:
Net income	$ 22,721	$ 20,581	$ 63,674	$ 53,733
Less: Income allocated to participating shares	73	68	214	167
Net Income Allocated to Shareholders	22,648	20,513	63,460	53,566
Net Income Available to Shareholders	$ 22,721	$ 20,581	$ 63,674	$ 53,733
Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic (in shares)	34,751,266	34,687,487	34,722,370	34,674,453
Add: Potentially dilutive shares (in shares)	208,873	81,018	208,139	72,724
Denominator for Treasury Stock Method—Diluted (in shares)	34,960,139	34,768,505	34,930,509	34,747,177
Weighted Average Shares Outstanding—Basic (in shares)	34,751,266	34,687,487	34,722,370	34,674,453
Add: Average participating shares outstanding (in shares)	111,821	114,746	116,969	108,414
Denominator for Two-Class Method—Diluted (in shares)	34,863,087	34,802,233	34,839,339	34,782,867
Earnings per share—basic (in dollars per share)	$ 0.65	$ 0.59	$ 1.83	$ 1.55
Earnings per share—diluted (in dollars per share)	0.65	0.59	1.82	1.54
Anti-dilutive warrants—exercise price (in dollars per share)	$ 31.53	$ 31.53	$ 31.53	$ 31.53
Warrants
Denominators for Earnings per Share:
Anti-dilutive excluded from potentially dilutive shares	443,575	517,012	452,188	517,012
Restricted Stock
Denominators for Earnings per Share:
Anti-dilutive excluded from potentially dilutive shares	92,577	146,695	95,707	134,983

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between Level 1 to Level 2	$ 0	$ 0
ASSETS
Total securities available-for-sale	697,954,000	693,487,000
U.S. treasury securities
ASSETS
Total securities available-for-sale	24,894,000	24,811,000
Obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	196,008,000	232,179,000
Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	114,895,000	129,777,000
Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	35,197,000	37,358,000
Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	192,604,000	125,604,000
Obligations of states and political subdivisions
ASSETS
Total securities available-for-sale	129,304,000	132,509,000
Marketable equity securities
ASSETS
Total securities available-for-sale	5,052,000	11,249,000
Fair Value Measurements, Recurring
ASSETS
Total securities available-for-sale	697,954,000	693,487,000
Trading securities held in a Rabbi Trust	5,039,000	4,410,000
Total securities	702,993,000	697,897,000
Total Assets	708,259,000	705,093,000
LIABILITIES
Total Liabilities	4,802,000	6,985,000
Fair Value Measurements, Recurring | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	4,814,000	6,960,000
LIABILITIES
Derivative financial liabilities	4,786,000	6,958,000
Fair Value Measurements, Recurring | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets	452,000	236,000
Fair Value Measurements, Recurring | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities	16,000	27,000
Fair Value Measurements, Recurring | U.S. treasury securities
ASSETS
Total securities available-for-sale	24,894,000	24,811,000
Fair Value Measurements, Recurring | Obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	196,008,000	232,179,000
Fair Value Measurements, Recurring | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	114,895,000	129,777,000
Fair Value Measurements, Recurring | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	35,197,000	37,358,000
Fair Value Measurements, Recurring | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	192,604,000	125,604,000
Fair Value Measurements, Recurring | Obligations of states and political subdivisions
ASSETS
Total securities available-for-sale	129,304,000	132,509,000
Fair Value Measurements, Recurring | Marketable equity securities
ASSETS
Total securities available-for-sale	5,052,000	11,249,000
Fair Value Measurements, Recurring | Level 1
ASSETS
Total securities available-for-sale	0	0
Trading securities held in a Rabbi Trust	5,039,000	4,410,000
Total securities	5,039,000	4,410,000
Total Assets	5,039,000	4,410,000
LIABILITIES
Total Liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets	0	0
Fair Value Measurements, Recurring | Level 1 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | U.S. treasury securities
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Obligations of states and political subdivisions
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Marketable equity securities
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 2
ASSETS
Total securities available-for-sale	697,954,000	693,487,000
Trading securities held in a Rabbi Trust	0	0
Total securities	697,954,000	693,487,000
Total Assets	703,220,000	700,683,000
LIABILITIES
Total Liabilities	4,802,000	6,985,000
Fair Value Measurements, Recurring | Level 2 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	4,814,000	6,960,000
LIABILITIES
Derivative financial liabilities	4,786,000	6,958,000
Fair Value Measurements, Recurring | Level 2 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets	452,000	236,000
Fair Value Measurements, Recurring | Level 2 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities	16,000	27,000
Fair Value Measurements, Recurring | Level 2 | U.S. treasury securities
ASSETS
Total securities available-for-sale	24,894,000	24,811,000
Fair Value Measurements, Recurring | Level 2 | Obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	196,008,000	232,179,000
Fair Value Measurements, Recurring | Level 2 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	114,895,000	129,777,000
Fair Value Measurements, Recurring | Level 2 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	35,197,000	37,358,000
Fair Value Measurements, Recurring | Level 2 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	192,604,000	125,604,000
Fair Value Measurements, Recurring | Level 2 | Obligations of states and political subdivisions
ASSETS
Total securities available-for-sale	129,304,000	132,509,000
Fair Value Measurements, Recurring | Level 2 | Marketable equity securities
ASSETS
Total securities available-for-sale	5,052,000	11,249,000
Fair Value Measurements, Recurring | Level 3
ASSETS
Total securities available-for-sale	0	0
Trading securities held in a Rabbi Trust	0	0
Total securities	0	0
Total Assets	0	0
LIABILITIES
Total Liabilities	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets	0	0
Fair Value Measurements, Recurring | Level 3 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 3 | U.S. treasury securities
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of states and political subdivisions
ASSETS
Total securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Marketable equity securities
ASSETS
Total securities available-for-sale	$ 0	$ 0

Fair Value Measurement - Asse35

Fair Value Measurement - Assets Measured at Estimated Fair Value on Nonrecurring Basis by Fair Value Hierarchy (Details) - Fair Value, Measurements, Nonrecurring - USD ($)		Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value on a nonrecurring basis		$ 0	$ 0
ASSETS
Loans held for sale	[1]	0	1,802,000
Impaired loans	[1]	11,407,000	10,329,000
Other real estate owned	[1]	718,000	396,000
Mortgage servicing rights	[1]	481,000	538,000
Total Assets	[1]	12,606,000	13,065,000
Level 1
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	0	0
Other real estate owned	[1]	0	0
Mortgage servicing rights	[1]	0	0
Total Assets	[1]	0	0
Level 2
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	0	0
Other real estate owned	[1]	0	0
Mortgage servicing rights	[1]	0	0
Total Assets	[1]	0	0
Level 3
ASSETS
Loans held for sale	[1]	0	1,802,000
Impaired loans	[1]	11,407,000	10,329,000
Other real estate owned	[1]	718,000	396,000
Mortgage servicing rights	[1]	481,000	538,000
Total Assets	[1]	$ 12,606,000	$ 13,065,000
[1]	This table represents only the nonrecurring items that are recorded at fair value in our financial statements.

Fair Value Measurement - Carryi

Fair Value Measurement - Carrying Values and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
ASSETS
Securities available-for-sale		$ 697,954	$ 693,487
Portfolio loans, net of unearned income		5,820,758	5,611,419
FHLB and other restricted stock		33,120	31,817
LIABILITIES
Junior subordinated debt securities		45,619	45,619
Carrying Value
ASSETS
Cash and due from banks, including interest-bearing deposits	[1]	114,440	139,486
Securities available-for-sale	[1]	697,954	693,487
Loans held for sale	[1]	47,936	3,793
Portfolio loans, net of unearned income	[1]	5,820,758	5,611,419
Bank owned life insurance	[1]	71,639	72,081
FHLB and other restricted stock	[1]	33,120	31,817
Trading securities held in a Rabbi Trust	[1]	5,039	4,410
Mortgage servicing rights	[1]	3,992	3,744
LIABILITIES
Deposits	[1]	5,443,240	5,272,377
Securities sold under repurchase agreements	[1]	39,923	50,832
Short-term borrowings	[1]	685,000	660,000
Long-term borrowings	[1]	12,911	14,713
Junior subordinated debt securities	[1]	45,619	45,619
Carrying Value | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	[1]	4,814	6,960
LIABILITIES
Derivative financial liabilities	[1]	4,786	6,958
Carrying Value | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets	[1]	452	236
Carrying Value | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities	[1]	16	27
Fair Value Measurements
ASSETS
Cash and due from banks, including interest-bearing deposits		114,400	139,486
Securities available-for-sale		697,954	693,487
Loans held for sale		48,045	3,815
Portfolio loans, net of unearned income		5,758,326	5,551,266
Bank owned life insurance		71,639	72,081
FHLB and other restricted stock		33,120	31,817
Trading securities held in a Rabbi Trust		5,039	4,410
Mortgage servicing rights		4,286	4,098
LIABILITIES
Deposits		5,448,025	5,276,499
Securities sold under repurchase agreements		39,923	50,832
Short-term borrowings		685,000	660,000
Long-term borrowings		13,318	15,267
Junior subordinated debt securities		45,619	45,619
Fair Value Measurements | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets		4,814	6,960
LIABILITIES
Derivative financial liabilities		4,786	6,958
Fair Value Measurements | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets		452	236
Fair Value Measurements | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities		16	27
Fair Value Measurements | Level 1
ASSETS
Cash and due from banks, including interest-bearing deposits		114,400	139,486
Securities available-for-sale		0	0
Loans held for sale		0	0
Portfolio loans, net of unearned income		0	0
Bank owned life insurance		0	0
FHLB and other restricted stock		0	0
Trading securities held in a Rabbi Trust		5,039	4,410
Mortgage servicing rights		0	0
LIABILITIES
Deposits		0	0
Securities sold under repurchase agreements		0	0
Short-term borrowings		0	0
Long-term borrowings		0	0
Junior subordinated debt securities		0	0
Fair Value Measurements | Level 1 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets		0	0
LIABILITIES
Derivative financial liabilities		0	0
Fair Value Measurements | Level 1 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets		0	0
Fair Value Measurements | Level 1 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities		0	0
Fair Value Measurements | Level 2
ASSETS
Cash and due from banks, including interest-bearing deposits		0	0
Securities available-for-sale		697,954	693,487
Loans held for sale		0	0
Portfolio loans, net of unearned income		0	0
Bank owned life insurance		71,639	72,081
FHLB and other restricted stock		0	0
Trading securities held in a Rabbi Trust		0	0
Mortgage servicing rights		0	0
LIABILITIES
Deposits		0	0
Securities sold under repurchase agreements		0	0
Short-term borrowings		0	0
Long-term borrowings		0	0
Junior subordinated debt securities		0	0
Fair Value Measurements | Level 2 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets		4,814	6,960
LIABILITIES
Derivative financial liabilities		4,786	6,958
Fair Value Measurements | Level 2 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets		452	236
Fair Value Measurements | Level 2 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities		16	27
Fair Value Measurements | Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits		0	0
Securities available-for-sale		0	0
Loans held for sale		48,045	3,815
Portfolio loans, net of unearned income		5,758,326	5,551,266
Bank owned life insurance		0	0
FHLB and other restricted stock		33,120	31,817
Trading securities held in a Rabbi Trust		0	0
Mortgage servicing rights		4,286	4,098
LIABILITIES
Deposits		5,448,025	5,276,499
Securities sold under repurchase agreements		39,923	50,832
Short-term borrowings		685,000	660,000
Long-term borrowings		13,318	15,267
Junior subordinated debt securities		45,619	45,619
Fair Value Measurements | Level 3 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets		0	0
LIABILITIES
Derivative financial liabilities		0	0
Fair Value Measurements | Level 3 | Interest rate lock commitments - mortgage loans
ASSETS
Derivative financial assets		0	0
Fair Value Measurements | Level 3 | Forward sale contracts - mortgage loans
LIABILITIES
Derivative financial liabilities		$ 0	$ 0
[1]	As reported in the Consolidated Balance Sheets.

Securities Available-for-Sale -

Securities Available-for-Sale - Composition of Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 690,472	$ 686,205
Gross Unrealized Gains	9,925	10,754
Gross Unrealized Losses	(2,443)	(3,472)
Fair Value	697,954	693,487
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	24,930	24,891
Gross Unrealized Gains	2	47
Gross Unrealized Losses	(38)	(127)
Fair Value	24,894	24,811
Obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	195,194	230,989
Gross Unrealized Gains	1,171	1,573
Gross Unrealized Losses	(357)	(383)
Fair Value	196,008	232,179
Collateralized mortgage obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	115,027	130,046
Gross Unrealized Gains	476	465
Gross Unrealized Losses	(608)	(734)
Fair Value	114,895	129,777
Residential mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	34,452	36,606
Gross Unrealized Gains	896	984
Gross Unrealized Losses	(151)	(232)
Fair Value	35,197	37,358
Commercial mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	193,382	127,311
Gross Unrealized Gains	511	243
Gross Unrealized Losses	(1,289)	(1,950)
Fair Value	192,604	125,604
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	123,672	128,783
Gross Unrealized Gains	5,632	3,772
Gross Unrealized Losses	0	(46)
Fair Value	129,304	132,509
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	686,657	678,626
Gross Unrealized Gains	8,688	7,084
Gross Unrealized Losses	(2,443)	(3,472)
Fair Value	692,902	682,238
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,815	7,579
Gross Unrealized Gains	1,237	3,670
Gross Unrealized Losses	0	0
Fair Value	$ 5,052	$ 11,249

Securities Available-for-Sale38

Securities Available-for-Sale - Fair Value and Age of Gross Unrealized Losses by Investment Category (Details) $ in Thousands	Sep. 30, 2017USD ($)security	Dec. 31, 2016USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	30	31
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 258,806	$ 267,500
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (2,211)	$ (3,472)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	1	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 7,586	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ (232)	$ 0
Available-for-sale, Securities, Number of Positions | security	31	31
Available-for-sale Securities, Fair Value, Total	$ 266,392	$ 267,500
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (2,443)	$ (3,472)
U.S. treasury securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	2	1
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 14,903	$ 9,811
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (38)	$ (127)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	2	1
Available-for-sale Securities, Fair Value, Total	$ 14,903	$ 9,811
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (38)	$ (127)
Obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	8	7
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 72,102	$ 62,483
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (357)	$ (383)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	8	7
Available-for-sale Securities, Fair Value, Total	$ 72,102	$ 62,483
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (357)	$ (383)
Collateralized mortgage obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	8	10
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 62,408	$ 83,031
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (608)	$ (734)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	8	10
Available-for-sale Securities, Fair Value, Total	$ 62,408	$ 83,031
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (608)	$ (734)
Residential mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	2	2
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 9,071	$ 10,022
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (151)	$ (232)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	2	2
Available-for-sale Securities, Fair Value, Total	$ 9,071	$ 10,022
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (151)	$ (232)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	10	10
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 100,322	$ 96,576
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (1,057)	$ (1,950)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	1	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 7,586	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ (232)	$ 0
Available-for-sale, Securities, Number of Positions | security	11	10
Available-for-sale Securities, Fair Value, Total	$ 107,908	$ 96,576
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (1,289)	$ (1,950)
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	0	1
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 0	$ 5,577
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ (46)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	0	1
Available-for-sale Securities, Fair Value, Total	$ 0	$ 5,577
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 0	$ (46)
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	30	31
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 258,806	$ 267,500
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ (2,211)	$ (3,472)
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	1	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 7,586	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ (232)	$ 0
Available-for-sale, Securities, Number of Positions | security	31	31
Available-for-sale Securities, Fair Value, Total	$ 266,392	$ 267,500
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (2,443)	$ (3,472)
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities, Less Than 12 Months, Number of Positions | security	0	0
Available-for-sale Securities, Less Than 12 Months, Fair Value	$ 0	$ 0
Available-for-sale Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, 12 Months or More, Number of Positions | security	0	0
Available-for-sale Securities, 12 Months or More, Fair Value	$ 0	$ 0
Available-for-sale Securities, 12 Months or More, Unrealized Losses	$ 0	$ 0
Available-for-sale, Securities, Number of Positions | security	0	0
Available-for-sale Securities, Fair Value, Total	$ 0	$ 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 0	$ 0

Securities Available-for-Sale39

Securities Available-for-Sale - Additional Information (Details) $ in Millions	Sep. 30, 2017USD ($)security	Dec. 31, 2016USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	31	31
Securities pledged for regulatory and legal requirements | $	$ 274	$ 342
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	31	31
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	0	0

Securities Available-for-Sale40

Securities Available-for-Sale - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Gains	$ 9,925	$ 10,754
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Losses	(2,443)	(3,472)
Total unrealized gains/(losses) on securities available for sale, Net Unrealized Gains/(Losses)	7,482	7,282
Income tax expense/(benefit), Gross Unrealized Gains	(3,485)	(3,776)
Income tax expense/(benefit), Gross Unrealized Losses	858	1,219
Income tax expense/(benefit), Net Unrealized Gains/(Losses)	(2,627)	(2,557)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Gains	6,440	6,978
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Losses	(1,585)	(2,253)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Net Unrealized Gains/(Losses)	$ 4,855	$ 4,725

Securities Available-for-Sale41

Securities Available-for-Sale - Amortized Cost and Fair Value of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 690,472	$ 686,205
Fair Value	697,954	693,487
Obligations of the U.S. Treasury, U.S. government corporations and agencies, and obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less, Amortized Cost	63,576
Due after one year through five years, Amortized Cost	177,864
Due after five years through ten years, Amortized Cost	56,875
Due after ten years, Amortized Cost	45,481
Available-for-sale Securities, Debt Maturities, Amortized Cost	343,796
Due in one year or less, Fair Value	63,646
Due after one year through five years, Fair Value	180,087
Due after five years through ten years, Fair Value	58,890
Due after ten years, Fair Value	47,583
Fair Value, Debt securities	350,206
Collateralized mortgage obligations of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	115,027	130,046
Fair Value	114,895	129,777
Residential mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	34,452	36,606
Fair Value	35,197	37,358
Commercial mortgage-backed securities of U.S. government corporations and agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	193,382	127,311
Fair Value	192,604	125,604
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	686,657	678,626
Fair Value	692,902	682,238
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,815	7,579
Fair Value	$ 5,052	$ 11,249

Loans and Loans Held for Sale -

Loans and Loans Held for Sale - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)contracttdrloan	Sep. 30, 2016USD ($)contracttdrloan	Sep. 30, 2017USD ($)contracttdrloan	Sep. 30, 2016USD ($)contracttdrloan	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 3,600,000		$ 3,600,000		$ 5,200,000
Loans, net of discount related to purchase accounting adjustments	4,600,000		4,600,000		7,100,000
Loans receivable, net	$ 5,868,694,000		5,868,694,000		$ 5,615,212,000
Maximum concentration of commercial real estate and commercial construction portfolio in loans (in excess of)					7.00%
Increase in loans held for sale during the period			$ 44,100,000
Threshold period of satisfactory performance for troubled debt restructuring to be restored to accruing status			6 months
Number of troubled debt restructuring loans returned back to accruing status | tdr	0	0	1	0
Amount of troubled debt restructuring loans returned to accruing status			$ 2,000,000
Number of loans modified not considered to be troubled debt restructuring | contract			13
Loans modified not considered to be troubled debt restructuring			$ 11,800,000
Commitment to lend additional funds on troubled debt restructuring	$ 0		$ 0
Minimum period of loan payment defaults following restructure for TDRs to be in default			90 days
Number of troubled debt restructuring loans that defaulted | loan	0	0	0	0
Disposal Group, Held-for-sale, Not Discontinued Operations | State College Retail Branch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in loans held for sale during the period			$ 43,400,000
Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 415,000,000		$ 415,000,000		$ 543,000,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of commercial loans in total portfolio loans	78.00%		78.00%		78.00%
Commercial loans	$ 4,561,391,000		$ 4,561,391,000		$ 4,355,395,000
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 2,681,693,000		$ 2,681,693,000		2,498,476,000
Number of loans modified not considered to be troubled debt restructuring | contract	1	1	4	2
Loans modified not considered to be troubled debt restructuring	$ 1,000,000	$ 1,900,000	$ 1,500,000	$ 2,500,000
Commercial Real Estate | Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	219,000,000		219,000,000		273,000,000
Commercial Real Estate | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	2,681,693,000		2,681,693,000		2,498,476,000
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	1,446,811,000		$ 1,446,811,000		1,401,035,000
Number of loans modified not considered to be troubled debt restructuring | contract		12	9	15
Loans modified not considered to be troubled debt restructuring		$ 16,900,000	$ 10,300,000	$ 25,600,000
Commercial and Industrial | Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	103,000,000		103,000,000		141,000,000
Commercial and Industrial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	1,446,811,000		1,446,811,000		1,401,035,000
Commercial Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	432,887,000		432,887,000		455,884,000
Commercial Construction | Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	15,000,000		15,000,000		33,000,000
Commercial Construction | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	432,887,000		432,887,000		455,884,000
Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	697,367,000		697,367,000		701,982,000
Residential Mortgage | Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	60,000,000		60,000,000		74,000,000
Home Equity, Installment and Other Consumer Construction | Integrity Bancshares, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	18,000,000		18,000,000		22,000,000
Commercial Real Estate and Commercial Construction | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 3,100,000,000		$ 3,100,000,000		$ 3,000,000,000
Combined percentage of commercial real estate and commercial construction in total commercial loans	68.00%		68.00%		68.00%
Combined percentage of commercial real estate and commercial construction in total portfolio loans	54.00%		54.00%		53.00%
Concentration risk percentage of commercial real estate and commercial construction			0.00%		0.00%
Maximum concentration of commercial real estate and commercial construction portfolio in loans (in excess of)	14.00%		14.00%		14.00%
Out of market exposure of combined portfolio (percent)	5.10%		5.10%		5.20%
Percentage of total loans out-of-state excluding contiguous states	2.70%		2.70%		2.70%

Loans and Loans Held for Sale43

Loans and Loans Held for Sale - Composition of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Composition of the loans
Portfolio loans, net of unearned income	$ 5,820,758	$ 5,611,419
Loans held for sale	47,936	3,793
Total Loans	5,868,694	5,615,212
Commercial Real Estate
Composition of the loans
Portfolio loans, net of unearned income	2,681,693	2,498,476
Total Loans	2,681,693	2,498,476
Commercial and Industrial
Composition of the loans
Portfolio loans, net of unearned income	1,446,811	1,401,035
Total Loans	1,446,811	1,401,035
Commercial Construction
Composition of the loans
Portfolio loans, net of unearned income	432,887	455,884
Total Loans	432,887	455,884
Residential Mortgage
Composition of the loans
Total Loans	697,367	701,982
Home Equity
Composition of the loans
Total Loans	487,806	482,284
Consumer Construction
Composition of the loans
Total Loans	4,550	5,906
Commercial
Composition of the loans
Portfolio loans, net of unearned income	4,561,391	4,355,395
Commercial | Commercial Real Estate
Composition of the loans
Portfolio loans, net of unearned income	2,681,693	2,498,476
Commercial | Commercial and Industrial
Composition of the loans
Portfolio loans, net of unearned income	1,446,811	1,401,035
Commercial | Commercial Construction
Composition of the loans
Portfolio loans, net of unearned income	432,887	455,884
Consumer
Composition of the loans
Portfolio loans, net of unearned income	1,259,367	1,256,024
Consumer | Residential Mortgage
Composition of the loans
Portfolio loans, net of unearned income	697,367	701,982
Consumer | Home Equity
Composition of the loans
Portfolio loans, net of unearned income	487,806	482,284
Consumer | Installment and Other Consumer
Composition of the loans
Portfolio loans, net of unearned income	69,644	65,852
Consumer | Consumer Construction
Composition of the loans
Portfolio loans, net of unearned income	$ 4,550	$ 5,906

Loans and Loans Held for Sale44

Loans and Loans Held for Sale - Summary of Restructured Loans (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	$ 1,471	$ 5,005	$ 4,522	$ 15,775
Performing TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans				15,605		$ 13,423
Performing TDRs | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Restructured loans				2,618		2,994
Performing TDRs | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Restructured loans				4,063		1,387
Performing TDRs | Commercial Construction
Financing Receivable, Modifications [Line Items]
Restructured loans				2,914		2,966
Performing TDRs | Residential Mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans				2,096		2,375
Performing TDRs | Home Equity
Financing Receivable, Modifications [Line Items]
Restructured loans				3,871		3,683
Performing TDRs | Installment and Other Consumer
Financing Receivable, Modifications [Line Items]
Restructured loans				43		18
Nonperforming TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans				10,203		11,598
Nonperforming TDRs | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Restructured loans				1,083		646
Nonperforming TDRs | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Restructured loans				3,580		4,493
Nonperforming TDRs | Commercial Construction
Financing Receivable, Modifications [Line Items]
Restructured loans				421		430
Nonperforming TDRs | Residential Mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans				4,095		5,068
Nonperforming TDRs | Home Equity
Financing Receivable, Modifications [Line Items]
Restructured loans				1,013		954
Nonperforming TDRs | Installment and Other Consumer
Financing Receivable, Modifications [Line Items]
Restructured loans				11		7
Total TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans				25,808		25,021
Total TDRs | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Restructured loans				3,701		3,640
Total TDRs | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Restructured loans				7,643		5,880
Total TDRs | Commercial Construction
Financing Receivable, Modifications [Line Items]
Restructured loans				3,335		3,396
Total TDRs | Residential Mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans				6,191		7,443
Total TDRs | Home Equity
Financing Receivable, Modifications [Line Items]
Restructured loans				4,884		4,637
Total TDRs | Installment and Other Consumer
Financing Receivable, Modifications [Line Items]
Restructured loans				$ 54		$ 25
[1]	Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.

Loans and Loans Held for Sale45

Loans and Loans Held for Sale - Restructured Loans By Type of Concession (Details) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2017USD ($)contract		Sep. 30, 2016USD ($)contract		Sep. 30, 2017USD ($)contract		Sep. 30, 2016USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		15		14		33		52
Pre-Modification Outstanding Recorded Investment	[1]	$ 1,094		$ 4,949		$ 4,204		$ 18,305
Post-Modification Outstanding Recorded Investment	[1]	1,471		5,005		4,522		15,775
Total Difference in Recorded Investment		$ 377		$ 56		$ 318		$ (2,530)
Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						2		8
Pre-Modification Outstanding Recorded Investment	[1]					$ 529		$ 9,026
Post-Modification Outstanding Recorded Investment	[1]					529		6,574
Total Difference in Recorded Investment						$ 0		$ (2,452)
Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | contract	[2]	13		10		25		26
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 420		$ 316		$ 798		$ 1,645
Post-Modification Outstanding Recorded Investment	[1],[2]	255		313		627		1,597
Total Difference in Recorded Investment	[2]	$ (165)		$ (3)		$ (171)		$ (48)
Interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		0		1		0		1
Pre-Modification Outstanding Recorded Investment		$ 0	[1]	$ 248	[1]	$ 0		$ 250	[1]
Post-Modification Outstanding Recorded Investment		0	[1]	250	[1]	0		248	[1]
Total Difference in Recorded Investment		$ 0		$ 2		$ 0		$ (2)
Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		0		1		3		2
Pre-Modification Outstanding Recorded Investment	[1]	$ 0		$ 280		$ 1,972		$ 410
Post-Modification Outstanding Recorded Investment	[1]	0		280		1,919		408
Total Difference in Recorded Investment		$ 0		$ 0		$ (53)		$ (2)
Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		2		2		3		15
Pre-Modification Outstanding Recorded Investment	[1]	$ 674		$ 4,105		$ 905		$ 6,974
Post-Modification Outstanding Recorded Investment	[1]	1,216		4,162		1,447		6,948
Total Difference in Recorded Investment		542		$ 57		$ 542		$ (26)
Commercial Real Estate | Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						1		1
Pre-Modification Outstanding Recorded Investment	[1]					$ 100		$ 4,721
Post-Modification Outstanding Recorded Investment	[1]					100		2,270
Total Difference in Recorded Investment						$ 0		$ (2,451)
Commercial Real Estate | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | contract	[2]					0		1
Pre-Modification Outstanding Recorded Investment	[1],[2]					$ 0		$ 709
Post-Modification Outstanding Recorded Investment	[1],[2]					0		681
Total Difference in Recorded Investment	[2]					$ 0		$ (28)
Commercial Real Estate | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract				1		0		1
Pre-Modification Outstanding Recorded Investment				$ 248	[1]	$ 0	[1]	$ 250
Post-Modification Outstanding Recorded Investment				250	[1]	0	[1]	248
Total Difference in Recorded Investment		$ 0		$ 2		$ 0		$ (2)
Commercial Real Estate | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		1		0		1		0
Pre-Modification Outstanding Recorded Investment	[1]	$ 400		$ 0		$ 400		$ 0
Post-Modification Outstanding Recorded Investment	[1]	400		0		400		0
Total Difference in Recorded Investment		$ 0		$ 0		$ 0		$ 0
Commercial and Industrial | Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						1		5
Pre-Modification Outstanding Recorded Investment	[1]					$ 429		$ 985
Post-Modification Outstanding Recorded Investment	[1]					429		985
Total Difference in Recorded Investment						$ 0		$ 0
Commercial and Industrial | Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						2		0
Pre-Modification Outstanding Recorded Investment	[1]					$ 1,799		$ 0
Post-Modification Outstanding Recorded Investment	[1]					1,799		0
Total Difference in Recorded Investment						$ 0		$ 0
Commercial and Industrial | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		1		2		1		5
Pre-Modification Outstanding Recorded Investment	[1]	$ 274		$ 4,105		$ 274		$ 4,860
Post-Modification Outstanding Recorded Investment	[1]	816		4,162		816		4,891
Total Difference in Recorded Investment		$ 542		$ 57		$ 542		$ 31
Commercial Construction | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						0		5
Pre-Modification Outstanding Recorded Investment	[1]					$ 0		$ 1,357
Post-Modification Outstanding Recorded Investment	[1]					0		1,302
Total Difference in Recorded Investment						$ 0		$ (55)
Residential Mortgage | Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						0		1
Pre-Modification Outstanding Recorded Investment	[1]					$ 0		$ 3,273
Post-Modification Outstanding Recorded Investment	[1]					0		3,273
Total Difference in Recorded Investment						$ 0		$ 0
Residential Mortgage | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | contract	[2]	1		3		2		7
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 148		$ 153		$ 181		$ 439
Post-Modification Outstanding Recorded Investment	[1],[2]	0		152		32		433
Total Difference in Recorded Investment	[2]	$ (148)		$ (1)		$ (149)		$ (6)
Residential Mortgage | Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract		0		1		0		1
Pre-Modification Outstanding Recorded Investment	[1]	$ 0		$ 280		$ 0		$ 280
Post-Modification Outstanding Recorded Investment	[1]	0		280		0		280
Total Difference in Recorded Investment		$ 0		$ 0		$ 0		$ 0
Residential Mortgage | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						0		1
Pre-Modification Outstanding Recorded Investment	[1]					$ 0		$ 483
Post-Modification Outstanding Recorded Investment	[1]					0		483
Total Difference in Recorded Investment						$ 0		$ 0
Home Equity | Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						0		1
Pre-Modification Outstanding Recorded Investment	[1]					$ 0		$ 47
Post-Modification Outstanding Recorded Investment	[1]					0		46
Total Difference in Recorded Investment						$ 0		$ (1)
Home Equity | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | contract	[2]	4		7		13		16
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 72		$ 163		$ 380		$ 481
Post-Modification Outstanding Recorded Investment	[1],[2]	70		161		375		470
Total Difference in Recorded Investment	[2]	$ (2)		$ (2)		$ (5)		$ (11)
Home Equity | Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						1		1
Pre-Modification Outstanding Recorded Investment	[1]					$ 173		$ 130
Post-Modification Outstanding Recorded Investment	[1]					120		128
Total Difference in Recorded Investment						$ (53)		$ (2)
Home Equity | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | contract						1		4
Pre-Modification Outstanding Recorded Investment	[1]					$ 231		$ 274
Post-Modification Outstanding Recorded Investment	[1]					231		272
Total Difference in Recorded Investment						$ 0		$ (2)
Installment and Other Consumer | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | contract	[2]	8		0		10		2
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 200		$ 0		$ 237		$ 16
Post-Modification Outstanding Recorded Investment	[1],[2]	185		0		220		13
Total Difference in Recorded Investment	[2]	$ (15)		$ 0		$ (17)		$ (3)
[1]	Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end.
[2]	Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

Loans and Loans Held for Sale46

Loans and Loans Held for Sale - Nonperforming Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Nonperforming Assets
Nonaccrual loans	$ 19,290	$ 31,037
Nonaccrual TDRs	10,203	11,598
Total nonaccrual loans	29,493	42,635
OREO	1,033	679
Total Nonperforming Assets	$ 30,526	$ 43,314

Allowance for Loan Losses - Age

Allowance for Loan Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	$ 5,829,789	$ 5,563,123
Total nonaccrual loans	29,493	42,635
Total past due	38,905	52,089
Total Loans	5,868,694	5,615,212
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	2,674,171	2,479,513
Total nonaccrual loans	6,571	16,172
Total past due	7,522	18,963
Total Loans	2,681,693	2,498,476
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	1,438,224	1,391,475
Total nonaccrual loans	7,349	8,071
Total past due	8,587	9,560
Total Loans	1,446,811	1,401,035
Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	428,744	450,410
Total nonaccrual loans	4,068	4,927
Total past due	4,143	5,474
Total Loans	432,887	455,884
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	684,848	689,635
Total nonaccrual loans	7,782	9,918
Total past due	12,519	12,347
Total Loans	697,367	701,982
Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	482,000	476,866
Total nonaccrual loans	3,675	3,439
Total past due	5,806	5,418
Total Loans	487,806	482,284
Installment and Other Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	69,316	65,525
Total nonaccrual loans	48	108
Total past due	328	327
Total Loans	69,644	65,852
Consumer Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	4,550	5,906
Total nonaccrual loans	0	0
Total past due	0	0
Total Loans	4,550	5,906
Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	47,936	3,793
Total nonaccrual loans	0	0
Total past due	0	0
Total Loans	47,936	3,793
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6,820	6,598
30 to 59 Days Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	530	2,032
30 to 59 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	499	1,061
30 to 59 Days Past Due | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	75	547
30 to 59 Days Past Due | Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,872	1,312
30 to 59 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,616	1,470
30 to 59 Days Past Due | Installment and Other Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	228	176
30 to 59 Days Past Due | Consumer Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
30 to 59 Days Past Due | Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,592	2,856
60 to 89 Days Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	421	759
60 to 89 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	739	428
60 to 89 Days Past Due | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
60 to 89 Days Past Due | Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	865	1,117
60 to 89 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	515	509
60 to 89 Days Past Due | Installment and Other Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	52	43
60 to 89 Days Past Due | Consumer Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
60 to 89 Days Past Due | Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	$ 0

Allowance for Loan Losses - Rec

Allowance for Loan Losses - Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings (Details) - Commercial - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,561,391	$ 4,355,395
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,353,041	$ 4,169,721
Total percentage of recorded investment in commercial loan	95.40%	95.70%
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 120,574	$ 88,198
Total percentage of recorded investment in commercial loan	2.60%	2.00%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 87,776	$ 97,476
Total percentage of recorded investment in commercial loan	2.00%	2.30%
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 2,681,693	$ 2,498,476
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial Real Estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 2,587,393	$ 2,423,742
Total percentage of recorded investment in commercial loan	96.50%	97.00%
Commercial Real Estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 55,218	$ 33,098
Total percentage of recorded investment in commercial loan	2.10%	1.30%
Commercial Real Estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 39,082	$ 41,636
Total percentage of recorded investment in commercial loan	1.40%	1.70%
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,446,811	$ 1,401,035
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial and Industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,354,269	$ 1,315,507
Total percentage of recorded investment in commercial loan	93.60%	93.90%
Commercial and Industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 53,853	$ 40,409
Total percentage of recorded investment in commercial loan	3.70%	2.90%
Commercial and Industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 38,689	$ 45,119
Total percentage of recorded investment in commercial loan	2.70%	3.20%
Commercial Construction
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 432,887	$ 455,884
Total percentage of recorded investment in commercial loan	99.99%	100.00%
Commercial Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 411,379	$ 430,472
Total percentage of recorded investment in commercial loan	95.00%	94.40%
Commercial Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 11,503	$ 14,691
Total percentage of recorded investment in commercial loan	2.70%	3.20%
Commercial Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 10,005	$ 10,721
Total percentage of recorded investment in commercial loan	2.30%	2.40%

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Loans considered nonperforming (in days)	90 days
Evaluation for impairment of substandard and nonaccrual commercial loans	$ 500,000
Impaired fiinancing receivables	31,988,000	$ 41,935,000
Integrity Bancshares, Inc.
Financing Receivable, Impaired [Line Items]
Acquired loans that experienced credit deterioration since acquisition	$ 6,500,000	$ 18,400,000

Allowance for Loan Losses - R50

Allowance for Loan Losses - Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status (Details) - Consumer - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,259,367	$ 1,256,024
Percentage of Total	100.00%	100.00%
Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,247,862	$ 1,242,559
Percentage of Total	99.10%	98.90%
Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 11,505	$ 13,465
Percentage of Total	0.90%	1.10%
Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 697,367	$ 701,982
Percentage of Total	100.00%	100.00%
Residential Mortgage | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 689,585	$ 692,064
Percentage of Total	98.90%	98.60%
Residential Mortgage | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 7,782	$ 9,918
Percentage of Total	1.10%	1.40%
Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 487,806	$ 482,284
Percentage of Total	100.00%	100.00%
Home Equity | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 484,131	$ 478,845
Percentage of Total	99.20%	99.30%
Home Equity | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 3,675	$ 3,439
Percentage of Total	0.80%	0.70%
Installment and Other Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 69,644	$ 65,852
Percentage of Total	100.00%	100.00%
Installment and Other Consumer | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 69,596	$ 65,744
Percentage of Total	99.90%	99.80%
Installment and Other Consumer | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 48	$ 108
Percentage of Total	0.10%	0.20%
Consumer Construction
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,550	$ 5,906
Percentage of Total	100.00%	100.00%
Consumer Construction | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,550	$ 5,906
Percentage of Total	100.00%	100.00%
Consumer Construction | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 0	$ 0
Percentage of Total	0.00%	0.00%

Allowance for Loan Losses - Inv

Allowance for Loan Losses - Investments in Loans Considered to be Impaired and Related Information on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	$ 2,520		$ 2,520		$ 991
With a related allowance recorded, Unpaid Principal Balance	2,553		2,553		2,460
Impaired Financing Receivable, Related Allowance	312		312		798
Without a related allowance recorded, Recorded Investment	29,468		29,468		40,944
Without a related allowance, Unpaid Principal Balance	35,868		35,868		48,539
Impaired Financing Receivable, Recorded Investment	31,988		31,988		41,935
Impaired Financing Receivable, Unpaid Principal Balance, Total	38,421		38,421		50,999
With a related allowance recorded, Average Recorded Investment	2,461	$ 2,467	36,321	$ 35,365
With a related allowance recorded, Interest Income Recognized	40	37	881	806
Without a related allowance recorded, Average Recorded Investment	33,806	34,665	1,277	2,523
Without a related allowance recorded, Interest Income Recognized	639	298	46	102
Impaired Financing Receivable, Average Recorded Investment, Total	36,267	37,132	37,598	37,888
Impaired Financing Receivable, Interest Income Recognized, Total	679	335	927	908
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	0		0		0
With a related allowance recorded, Unpaid Principal Balance	0		0		0
Impaired Financing Receivable, Related Allowance	0		0		0
Without a related allowance recorded, Recorded Investment	6,341		6,341		16,352
Without a related allowance, Unpaid Principal Balance	6,985		6,985		17,654
Impaired Financing Receivable, Recorded Investment	6,341		6,341		16,352
Impaired Financing Receivable, Unpaid Principal Balance, Total	6,985		6,985		17,654
With a related allowance recorded, Average Recorded Investment	0	0	6,577	7,551
With a related allowance recorded, Interest Income Recognized	0	0	140	106
Without a related allowance recorded, Average Recorded Investment	6,415	7,582	0	0
Without a related allowance recorded, Interest Income Recognized	105	38	0	0
Impaired Financing Receivable, Average Recorded Investment, Total	6,415	7,582	6,577	7,551
Impaired Financing Receivable, Interest Income Recognized, Total	105	38	140	106
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	2,468		2,468		964
With a related allowance recorded, Unpaid Principal Balance	2,501		2,501		2,433
Impaired Financing Receivable, Related Allowance	260		260		771
Without a related allowance recorded, Recorded Investment	6,075		6,075		5,902
Without a related allowance, Unpaid Principal Balance	8,245		8,245		7,699
Impaired Financing Receivable, Recorded Investment	8,543		8,543		6,866
Impaired Financing Receivable, Unpaid Principal Balance, Total	10,746		10,746		10,132
With a related allowance recorded, Average Recorded Investment	2,406	2,437	11,001	7,447
With a related allowance recorded, Interest Income Recognized	37	37	164	156
Without a related allowance recorded, Average Recorded Investment	9,074	7,326	1,218	2,492
Without a related allowance recorded, Interest Income Recognized	130	52	44	100
Impaired Financing Receivable, Average Recorded Investment, Total	11,480	9,763	12,219	9,939
Impaired Financing Receivable, Interest Income Recognized, Total	167	89	208	256
Commercial Construction
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	0		0
With a related allowance recorded, Unpaid Principal Balance	0		0
Impaired Financing Receivable, Related Allowance	0		0
Without a related allowance recorded, Recorded Investment	5,974		5,974		6,613
Without a related allowance, Unpaid Principal Balance	8,629		8,629		10,306
Impaired Financing Receivable, Recorded Investment	5,974		5,974		6,613
Impaired Financing Receivable, Unpaid Principal Balance, Total	8,629		8,629		10,306
With a related allowance recorded, Average Recorded Investment	0	0	7,222	8,498
With a related allowance recorded, Interest Income Recognized	0	0	194	143
Without a related allowance recorded, Average Recorded Investment	7,140	8,039	0	0
Without a related allowance recorded, Interest Income Recognized	154	49	0	0
Impaired Financing Receivable, Average Recorded Investment, Total	7,140	8,039	7,222	8,498
Impaired Financing Receivable, Interest Income Recognized, Total	154	49	194	143
Consumer Real Estate
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	22		22		26
With a related allowance recorded, Unpaid Principal Balance	22		22		26
Impaired Financing Receivable, Related Allowance	22		22		26
Without a related allowance recorded, Recorded Investment	11,054		11,054		12,053
Without a related allowance, Unpaid Principal Balance	11,979		11,979		12,849
Impaired Financing Receivable, Recorded Investment	11,076		11,076		12,079
Impaired Financing Receivable, Unpaid Principal Balance, Total	12,001		12,001		12,875
With a related allowance recorded, Average Recorded Investment	23	28	11,488	11,831
With a related allowance recorded, Interest Income Recognized	1	0	382	400
Without a related allowance recorded, Average Recorded Investment	11,149	11,686	24	29
Without a related allowance recorded, Interest Income Recognized	250	159	1	2
Impaired Financing Receivable, Average Recorded Investment, Total	11,172	11,714	11,512	11,860
Impaired Financing Receivable, Interest Income Recognized, Total	251	159	383	402
Other Consumer
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	30		30		1
With a related allowance recorded, Unpaid Principal Balance	30		30		1
Impaired Financing Receivable, Related Allowance	30		30		1
Without a related allowance recorded, Recorded Investment	24		24		24
Without a related allowance, Unpaid Principal Balance	30		30		31
Impaired Financing Receivable, Recorded Investment	54		54		25
Impaired Financing Receivable, Unpaid Principal Balance, Total	60		60		$ 32
With a related allowance recorded, Average Recorded Investment	32	2	33	38
With a related allowance recorded, Interest Income Recognized	2	0	1	1
Without a related allowance recorded, Average Recorded Investment	28	32	35	2
Without a related allowance recorded, Interest Income Recognized	0	0	1	0
Impaired Financing Receivable, Average Recorded Investment, Total	60	34	68	40
Impaired Financing Receivable, Interest Income Recognized, Total	$ 2	$ 0	$ 2	$ 1

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 55,351	$ 52,213	$ 52,775	$ 48,147
Charge-offs	(2,660)	(1,500)	(11,423)	(8,623)
Recoveries	1,171	564	2,459	1,890
Net (Charge-offs)/ Recoveries	(1,489)	(936)	(8,964)	(6,733)
Provision for loan losses	2,850	2,516	12,901	12,379
Balance at End of Period	56,712	53,793	56,712	53,793
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	24,358	15,978	19,976	15,043
Charge-offs	(37)	(93)	(2,100)	(1,808)
Recoveries	182	264	415	662
Net (Charge-offs)/ Recoveries	145	171	(1,685)	(1,146)
Provision for loan losses	472	4,244	6,684	6,496
Balance at End of Period	24,975	20,393	24,975	20,393
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	9,256	14,771	10,810	10,853
Charge-offs	(644)	(414)	(4,041)	(3,244)
Recoveries	243	169	499	589
Net (Charge-offs)/ Recoveries	(401)	(245)	(3,542)	(2,655)
Provision for loan losses	859	(2,232)	2,446	4,096
Balance at End of Period	9,714	12,294	9,714	12,294
Commercial Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	13,944	11,701	13,999	12,625
Charge-offs	(1,453)	(163)	(2,097)	(1,108)
Recoveries	473	17	842	20
Net (Charge-offs)/ Recoveries	(980)	(146)	(1,255)	(1,088)
Provision for loan losses	1,951	1,356	2,171	1,374
Balance at End of Period	14,915	12,911	14,915	12,911
Consumer Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	5,803	8,418	6,095	8,400
Charge-offs	(101)	(369)	(1,957)	(891)
Recoveries	91	44	270	342
Net (Charge-offs)/ Recoveries	(10)	(325)	(1,687)	(549)
Provision for loan losses	(262)	(1,760)	1,123	(1,518)
Balance at End of Period	5,531	6,333	5,531	6,333
Other Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,990	1,345	1,895	1,226
Charge-offs	(425)	(461)	(1,228)	(1,572)
Recoveries	182	70	433	277
Net (Charge-offs)/ Recoveries	(243)	(391)	(795)	(1,295)
Provision for loan losses	(170)	908	477	1,931
Balance at End of Period	$ 1,577	$ 1,862	$ 1,577	$ 1,862

Allowance for Loan Losses - S53

Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 312		$ 798
Allowance for Loan Losses, Collectively Evaluated for Impairment	56,400		51,977
Total Allowance for Loan Losses	56,712	$ 55,351	52,775	$ 53,793	$ 52,213	$ 48,147
Portfolio Loans, Individually Evaluated for Impairment	31,988		41,935
Portfolio Loans, Collectively Evaluated for Impairment	5,788,770		5,569,484
Total Portfolio Loans	5,820,758		5,611,419
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	24,975		19,976
Total Allowance for Loan Losses	24,975	24,358	19,976	20,393	15,978	15,043
Portfolio Loans, Individually Evaluated for Impairment	6,341		16,352
Portfolio Loans, Collectively Evaluated for Impairment	2,675,352		2,482,124
Total Portfolio Loans	2,681,693		2,498,476
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	260		771
Allowance for Loan Losses, Collectively Evaluated for Impairment	9,454		10,039
Total Allowance for Loan Losses	9,714	9,256	10,810	12,294	14,771	10,853
Portfolio Loans, Individually Evaluated for Impairment	8,543		6,866
Portfolio Loans, Collectively Evaluated for Impairment	1,438,268		1,394,169
Total Portfolio Loans	1,446,811		1,401,035
Commercial Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	14,915		13,999
Total Allowance for Loan Losses	14,915	13,944	13,999	12,911	11,701	12,625
Portfolio Loans, Individually Evaluated for Impairment	5,974		6,613
Portfolio Loans, Collectively Evaluated for Impairment	426,913		449,271
Total Portfolio Loans	432,887		455,884
Consumer Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	22		26
Allowance for Loan Losses, Collectively Evaluated for Impairment	5,509		6,069
Total Allowance for Loan Losses	5,531	5,803	6,095	6,333	8,418	8,400
Portfolio Loans, Individually Evaluated for Impairment	11,076		12,079
Portfolio Loans, Collectively Evaluated for Impairment	1,178,647		1,178,093
Total Portfolio Loans	1,189,723		1,190,172
Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	30		1
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,547		1,894
Total Allowance for Loan Losses	1,577	$ 1,990	1,895	$ 1,862	$ 1,345	$ 1,226
Portfolio Loans, Individually Evaluated for Impairment	54		25
Portfolio Loans, Collectively Evaluated for Impairment	69,590		65,827
Total Portfolio Loans	$ 69,644		$ 65,852

Derivative Instruments and He54

Derivative Instruments and Hedging Activities - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Period for commitments	60 days

Derivative Instruments and He55

Derivative Instruments and Hedging Activities - Value of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Assets
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	$ 4,814	$ 6,960
Other Assets | Interest rate swap contracts - commercial loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	4,814	6,960
Notional amount, Derivatives (included in Other Assets)	209,572	232,396
Collateral posted, Derivatives	0	0
Other Assets | Interest rate lock commitments - mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	452	236
Notional amount, Derivatives (included in Other Assets)	13,939	8,490
Other Assets | Forward sale contracts - mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	0	0
Notional amount, Derivatives (included in Other Assets)	0	0
Other Liabilities
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	4,786	6,958
Other Liabilities | Interest rate swap contracts - commercial loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	4,786	6,958
Notional amount, Derivatives (included in Other Liabilities)	209,572	232,396
Collateral posted, Derivatives	3,046	14,340
Other Liabilities | Interest rate lock commitments - mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	0	0
Notional amount, Derivatives (included in Other Liabilities)	0	0
Other Liabilities | Forward sale contracts - mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	16	27
Notional amount, Derivatives (included in Other Liabilities)	$ 14,564	$ 8,216

Derivative Instruments and He56

Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Other Assets
Derivatives (included in Other Assets)
Gross amounts recognized		$ 6,124	$ 8,590
Gross amounts offset		(1,310)	(1,630)
Net amounts presented in the Consolidated Balance Sheets		4,814	6,960
Gross amounts not offset	[1]	0	0
Net Amount		4,814	6,960
Other Liabilities
Derivatives (included in Other Liabilities)
Gross amounts recognized		6,096	8,588
Gross amounts offset		(1,310)	(1,630)
Net amounts presented in the Consolidated Balance Sheets		4,786	6,958
Gross amounts not offset	[1]	(3,505)	(14,340)
Net Amount		$ 1,281	$ (7,382)
[1]	Amounts represent posted collateral.

- Amount of Gain or Loss Recogn

- Amount of Gain or Loss Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	$ (25)	$ 116	$ 251	$ 419
Interest Rate Swap Contracts - Commercial Loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	9	(87)	25	34
Interest Rate Lock Commitments - Mortgage Loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	(4)	97	216	478
Forward Sale Contracts - Mortgage Loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	$ (30)	$ 106	$ 10	$ (93)

Borrowings - Additional Informa

Borrowings - Additional Information (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Long Term And Short Term Debt [Line Items]
Total long-term debt outstanding at a fixed rate	$ 9,700,000
Total long-term debt outstanding at a variable rate	3,100,000
Capital lease	100,000
Federal Home Loan Bank Advance
Long Term And Short Term Debt [Line Items]
Total borrowings	698,000,000	$ 675,000,000
Short-term borrowings	685,000,000
Long-term borrowings	12,900,000
Maximum borrowing capacity	2,500,000,000
Borrowing capacity utilized	902,000,000
Letter of credit to collateralize public funds	204,000,000
Remaining borrowing capacity	1,600,000,000
Mortgage Backed Securities
Long Term And Short Term Debt [Line Items]
Mortgage backed securities pledged as collateral	$ 46,700,000	$ 53,200,000

Borrowings - Summary of Informa

Borrowings - Summary of Information Pertaining to Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Long Term And Short Term Debt [Line Items]
Short-term borrowings	$ 724,923	$ 710,832
Long-term borrowings	58,530	60,332
Total Borrowings	$ 783,453	$ 771,164
Short-term borrowings, Weighted Average Rate	1.25%	0.70%
Long-term borrowings, Weighted Average Rate	3.57%	3.30%
Total Borrowings, Weighted Average Rate	1.42%	0.90%
Securities Sold under Repurchase Agreements
Long Term And Short Term Debt [Line Items]
Short-term borrowings	$ 39,923	$ 50,832
Short-term borrowings, Weighted Average Rate	0.16%	0.01%
Short-Term Borrowings
Long Term And Short Term Debt [Line Items]
Short-term borrowings		$ 660,000
Short-term borrowings, Weighted Average Rate	1.31%	0.76%
Other Long-Term Borrowings
Long Term And Short Term Debt [Line Items]
Long-term borrowings		$ 14,713
Long-term borrowings, Weighted Average Rate	2.97%	2.91%
Junior Subordinated Debt Securities
Long Term And Short Term Debt [Line Items]
Long-term borrowings		$ 45,619
Long-term borrowings, Weighted Average Rate	3.74%	3.42%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Allowance for unfunded commitments	$ 2.1	$ 2.6

Commitments and Contingencies61

Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Commitments and letters of credit	$ 1,507,295	$ 1,594,230
Commitments to Extend Credit
Other Commitments [Line Items]
Commitments and letters of credit	1,421,906	1,509,696
Standby Letters of Credit
Other Commitments [Line Items]
Commitments and letters of credit	$ 85,389	$ 84,534

Other Comprehensive Income (Det

Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pre-Tax Amount
Other comprehensive income (loss), before tax		$ 391	$ (1,377)	$ 1,816	$ 16,637
Tax (Expense) Benefit
Other comprehensive income (loss), tax		(137)	482	(636)	(5,823)
Net of Tax Amount
Other Comprehensive Income/(Loss)		254	(895)	1,180	10,814
Accumulated Net Investment Gain (Loss) Attributable to Parent
Pre-Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale		(148)	(1,921)	4,186	11,748
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	(3,987)	0
Tax (Expense) Benefit
Change in net unrealized gains/(losses) on securities available-for-sale		52	672	(1,470)	(4,112)
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	1,400	0
Net of Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale		(96)	(1,249)	2,716	7,636
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income	[1]	0	0	(2,587)	0
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Pre-Tax Amount
Other comprehensive income (loss), before tax		539	544	1,617	4,889
Tax (Expense) Benefit
Other comprehensive income (loss), tax		(189)	(190)	(566)	(1,711)
Net of Tax Amount
Other Comprehensive Income/(Loss)		$ 350	$ 354	$ 1,051	$ 3,178
[1]	Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income and have affected certain lines in the consolidated statement of comprehensive income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.

Employee Benefits - Additional

Employee Benefits - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Retirement Benefits [Abstract]
Pension plan curtailment gain	$ 1
Period of unrecognized benefits associated with prior year plan amendments that would have been amortized into income	7 years
Number of consecutive years of employee's compensation		5 years
Number of total years of employee's compensation		10 years
Expected long-term rate of return on plan assets		7.50%

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$ 0	$ (6)	$ 0	$ 469
Interest cost on projected benefit obligation	1,025	1,099	3,075	3,200
Expected return on plan assets	(1,582)	(1,444)	(4,746)	(4,337)
Amortization of prior service credit	475	29	1,424	(41)
Recognized net actuarial loss	0	638	0	1,708
Net Periodic Pension Expense	$ (82)	$ 316	$ (247)	$ 999

Qualified Affordable Housing 65

Qualified Affordable Housing Projects (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Investments in Affordable Housing Projects [Abstract]
Investment in qualified affordable housing projects	$ 10,000,000		$ 10,000,000		$ 11,700,000
Open commitments to fund future investments	0		0		$ 0
Amortization expense included in noninterest expense	800,000	$ 800,000	2,300,000	$ 2,500,000
Tax credits	$ 900,000	$ 900,000	$ 2,600,000	$ 2,700,000

Sale of Retail Branch Office (D

Sale of Retail Branch Office (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deposits held for sale	$ 38,960	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations | State College Retail Branch | First Citizens Community Bank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale	43,400
Deposits held for sale	$ 39,000