United Community Banks (UCB) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Entity Registrant Name	UNITED COMMUNITY BANKS INC
Entity Central Index Key	857855
Trading Symbol	ucbi
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Voting Common Stock
Entity Common Stock, Shares Outstanding		50,246,315
Non-Voting Common Stock
Entity Common Stock, Shares Outstanding		10,080,787

Consolidated_Statement_of_Inco

Consolidated Statement of Income (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest revenue:
Loans, including fees	$49,664	$47,688
Investment securities, including tax exempt of $158 and $188	12,058	11,607
Deposits in banks and short-term investments	812	843
Total interest revenue	62,534	60,138
Deposits:
NOW	394	440
Money market	673	563
Savings	20	20
Time	1,109	1,771
Total deposit interest expense	2,196	2,794
Short-term borrowings	98	840
Federal Home Loan Bank advances	392	58
Long-term debt	2,606	2,634
Total interest expense	5,292	6,326
Net interest revenue	57,242	53,812
Provision for credit losses	1,800	2,500
Net interest revenue after provision for credit losses	55,442	51,312
Fee revenue:
Service charges and fees	7,615	7,898
Mortgage loan and other related fees	2,755	1,354
Brokerage fees	1,551	1,177
Gains from sales of SBA loans	1,141
Securities gains, net	1,539	217
Loss from prepayment of debt	-1,038
Other	2,119	1,530
Total fee revenue	15,682	12,176
Total revenue	71,124	63,488
Operating expenses:
Salaries and employee benefits	26,446	24,396
Communications and equipment	3,271	3,239
Occupancy	3,278	3,378
Advertising and public relations	750	626
Postage, printing and supplies	938	776
Professional fees	1,919	1,427
FDIC assessments and other regulatory charges	1,209	1,353
Other	5,250	3,855
Total operating expenses	43,061	39,050
Net income before income taxes	28,063	24,438
Income tax expense	10,393	9,038
Net income	17,670	15,400
Preferred stock dividends and discount accretion		439
Net income available to common shareholders	$17,670	$14,961
Earnings per common share:
Basic (in dollars per share)	$0.29	$0.25
Diluted (in dollars per share)	$0.29	$0.25
Weighted average common shares outstanding:
Basic (in shares)	60,905	60,059
Diluted (in shares)	60,909	60,061

Consolidated_Statement_of_Inco1

Consolidated Statement of Income (Unaudited) (Parentheticals) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Investment securities tax exemption	$158	$188

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statement Of Comprehensive Income (Loss) [Abstract]
Net income, Before-tax Amount	$28,063	$24,438
Net income, Tax (Expense) Benefit	-10,393	-9,038
Net income, Net of Tax Amount	17,670	15,400
Unrealized gains on available-for-sale securities:
Unrealized holding gains arising during period, Before-tax Amount	13,989	3,869
Unrealized holding gains arising during period, Tax (Expense) Benefit	-5,305	-1,441
Unrealized holding gains arising during period, Net of Tax Amount	8,684	2,428
Reclassification adjustment for gains included in net income, Before-tax Amount	-1,539	-217
Reclassification adjustment for gains included in net income, Tax (Expense) Benefit	598	92
Reclassification adjustment for gains included in net income, Net of Tax Amount	-941	-125
Net unrealized gains, Before-tax Amount	12,450	3,652
Net unrealized gains, Tax (Expense) Benefit	-4,707	-1,349
Net unrealized gains, Net of Tax Amount	7,743	2,303
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Before-tax Amount	484	330
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Tax (Expense) Benefit	-182	-123
Amortization of losses included in net income on available-for-sale securities transferred to held-to-maturity, Net of Tax Amount	302	207
Net unrealized gains, Before-tax Amount	484	330
Net unrealized gains, Tax (Expense) Benefit	-182	-123
Net unrealized gains, Net of Tax Amount	302	207
Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Before-tax Amount	425	97
Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Tax (Expense) Benefit	-165	-38
Amortization of losses included in net income on terminated derivative financial instruments that were previously accounted for as cash flow hedges, Net of Tax Amount	260	59
Unrealized losses on derivative financial instruments accounted for as cash flow hedges, Before-tax Amount	-471	-2,832
Unrealized losses on derivative financial instruments accounted for as cash flow hedges, Tax (Expense) Benefit	183	1,102
Unrealized losses on derivative financial instruments accounted for as cash flow hedges, Net of Tax Amount	-288	-1,730
Net unrealized losses, Before-tax Amount	-46	-2,735
Net unrealized losses, Tax (Expense) Benefit	18	1,064
Net unrealized losses, Net of Tax Amount	-28	-1,671
Net actuarial gain on defined benefit pension plan, Before-tax Amount		296
Net actuarial gain on defined benefit pension plan, Tax (Expense) Benefit		-115
Net actuarial gain on defined benefit pension plan, Net of Tax Amount		181
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Before-tax Amount	159	91
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Tax (Expense) Benefit	-62	-35
Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan, Net of Tax Amount	97	56
Net defined benefit pension plan activity, Before-tax Amount	159	387
Net defined benefit pension plan activity, Tax (Expense) Benefit	-62	-150
Net defined benefit pension plan activity, Net of Tax Amount	97	237
Total other comprehensive income, Before-tax Amount	13,047	1,634
Total other comprehensive income, Tax (Expense) Benefit	-4,933	-558
Total other comprehensive income, net of tax amount	8,114	1,076
Comprehensive income, Before-tax Amount	41,110	26,072
Comprehensive income, Tax (Expense) Benefit	-15,326	-9,596
Comprehensive income, Net of Tax Amount	$25,784	$16,476

Consolidated_Balance_Sheet_Una

Consolidated Balance Sheet (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$77,493	$77,180	$52,813
Interest-bearing deposits in banks	82,269	89,074	110,529
Short-term investments	25,902	26,401	49,999
Cash and cash equivalents	185,664	192,655	213,341
Securities available for sale	1,801,973	1,782,734	1,837,676
Securities held to maturity (fair value $413,550, $425,233 and $473,136)	399,228	415,267	464,697
Mortgage loans held for sale	15,723	13,737	10,933
Loans, net of unearned income	4,787,689	4,672,119	4,355,708
Less allowance for loan losses	-70,007	-71,619	-75,223
Loans, net	4,717,682	4,600,500	4,280,485
Assets covered by loss sharing agreements with the FDIC		3,315	21,353
Premises and equipment, net	159,036	159,390	161,540
Bank owned life insurance	81,490	81,294	80,790
Accrued interest receivable	20,154	20,103	18,572
Net deferred tax asset	201,898	215,503	243,683
Derivative financial instruments	20,291	20,599	21,563
Other assets	60,764	61,889	43,604
Total assets	7,663,903	7,566,986	7,398,237
Deposits:
Demand	1,694,755	1,574,317	1,471,781
NOW	1,420,956	1,504,887	1,392,863
Money market	1,306,421	1,273,283	1,235,429
Savings	312,013	292,308	270,910
Time:
Less than $100,000	723,323	748,478	833,188
Greater than $100,000	482,955	508,228	572,889
Brokered	497,508	425,011	470,481
Total deposits	6,437,931	6,326,512	6,247,541
Repurchase agreements		6,000	123,075
Federal Home Loan Bank advances	270,125	270,125	50,125
Long-term debt	113,901	129,865	129,865
Derivative financial instruments	29,276	31,997	42,309
Unsettled securities purchases		5,425	63,999
Accrued expenses and other liabilities	48,965	57,485	37,593
Total liabilities	6,900,198	6,827,409	6,694,507
Shareholders' equity:
Common stock	50,228	50,178	50,011
Common stock issuable; 400,369, 357,983 and 237,763 shares	5,895	5,168	3,840
Capital surplus	1,081,110	1,080,508	1,091,696
Accumulated deficit	-372,933	-387,568	-433,130
Accumulated other comprehensive loss	-10,676	-18,790	-18,768
Total shareholders' equity	763,705	739,577	703,730
Total liabilities and shareholders' equity	7,663,903	7,566,986	7,398,237
Non-Voting Common Stock
Shareholders' equity:
Common stock	10,081	10,081	10,081
Total shareholders' equity	$10,081	$10,081	$10,081

Consolidated_Balance_Sheet_Una1

Consolidated Balance Sheet (Unaudited) (Parentheticals) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, except Share data, unless otherwise specified
Held to maturity, fair value (in dollars)	$413,550	$425,233	$473,136
Common stock, par value (in dollars per share)	$1	$1	$1
Common stock, shares authorized	100,000,000	100,000,000	100,000,000
Common stock, shares issued	50,228,075	50,178,605	50,011,094
Common stock, shares outstanding	50,228,075	50,178,605	50,011,094
Common stock issuable, shares	400,369	357,983	237,763
Non-Voting Common Stock
Common stock, par value (in dollars per share)	$1	$1	$1
Common stock, shares authorized	26,000,000	26,000,000	26,000,000
Common stock, shares issued	10,080,787	10,080,787	10,080,787
Common stock, shares outstanding	10,080,787	10,080,787	10,080,787

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (USD $)	Series B Preferred Stock	Series D Preferred Stock	Non-Voting Common Stock	Common Stock	Common Stock Issuable	Capital Surplus	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
In Thousands, unless otherwise specified
Balance at Dec. 31, 2013	$105,000	$16,613	$13,188	$46,243	$3,930	$1,078,676	($448,091)	($19,844)	$795,715
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income							15,400		15,400
Other comprehensive income								1,076	1,076
Redemption of Series B preferred stock (105,000 shares)	-105,000								-105,000
Redemption of Series D preferred stock (16,613 shares)		-16,613							-16,613
Common stock issued at market (640,000 shares)				640		11,566			12,206
Common stock issued to dividend reinvestment plan and employee benefit plans (11,837 and 3,689 shares for March 31, 2014 and March 31, 2015 respectively)				12		197			209
Conversion of non-voting common stock to voting (3,107,419 shares)			-3,107	3,107
Amortization of stock option and restricted stock awards						1,120			1,120
Vesting of restricted stock, net of shares surrendered to cover payroll taxes (1,096 shares issued, 0 shares deferred and 31,718 shares issued, 51,326 shares deferred for March 31, 2014 and March 31, 2015 respectively)				1		-2			-1
Deferred compensation plan, net, including dividend equivalents					57				57
Shares issued from deferred compensation plan (7,397 and 14,063 shares for March 31, 2014 and March 31, 2015 respectively)				8	-147	139
Preferred stock dividends:
Series B							-159		-159
Series D							-280		-280
Balance at Mar. 31, 2014			10,081	50,011	3,840	1,091,696	-433,130	-18,768	703,730
Balance at Dec. 31, 2014			10,081	50,178	5,168	1,080,508	-387,568	-18,790	739,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income							17,670		17,670
Other comprehensive income								8,114	8,114
Common stock issued to dividend reinvestment plan and employee benefit plans (11,837 and 3,689 shares for March 31, 2014 and March 31, 2015 respectively)				4		57			61
Amortization of stock option and restricted stock awards						991			991
Vesting of restricted stock, net of shares surrendered to cover payroll taxes (1,096 shares issued, 0 shares deferred and 31,718 shares issued, 51,326 shares deferred for March 31, 2014 and March 31, 2015 respectively)				32	759	-1,129			-338
Deferred compensation plan, net, including dividend equivalents					106				106
Shares issued from deferred compensation plan (7,397 and 14,063 shares for March 31, 2014 and March 31, 2015 respectively)				14	-138	124
Common stock dividends ($.05 per share)							-3,035		-3,035
Tax on restricted stock vesting						559			559
Balance at Mar. 31, 2015			$10,081	$50,228	$5,895	$1,081,110	($372,933)	($10,676)	$763,705

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statement Of Changes In Shareholders' Equity [Abstract]
Number of shares redeemed of Series B preferred stock		105,000
Number of shares redeemed of Series D preferred stock		16,613
Number of common stock issued at market		640,000
Common stock issued to dividend reinvestment plan and employee benefit plans	3,689	11,837
Conversion of non-voting common stock to voting shares		3,107,419
Vesting of restricted stock, net of shares surrendered to cover payroll taxes, shares issued	31,718	1,096
Vesting of restricted stock, net of shares surrendered to cover payroll taxes, shares deferred	51,326	0
Shares issued from deferred compensation plan	14,063	7,397
Common stock dividends (in dollars per share)	$0.05

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net income	$17,670	$15,400
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	5,158	4,927
Provision for credit losses	1,800	2,500
Stock based compensation	991	1,120
Deferred income tax benefit	8,672	9,776
Securities gains, net	-1,539	-217
Net losses and write downs on sales of other real estate owned	-81	-244
Loss on prepayment of borrowings	1,038
Changes in assets and liabilities:
Other assets and accrued interest receivable	7,106	6,607
Accrued expenses and other liabilities	-11,342	-12,230
Mortgage loans held for sale	-1,986	-614
Net cash provided by operating activities	27,487	27,025
Investment securities held to maturity:
Proceeds from maturities and calls of securities held to maturity:	16,144	15,007
Investment securities available for sale:
Proceeds from sales of securities available for sale	69,467	153,316
Proceeds from maturities and calls of securities available for sale	55,121	56,757
Purchases of securities available for sale	-137,305	-173,024
Net increase in loans	-122,257	-34,027
Funds (paid to) collected from FDIC under loss sharing agreements	-1,198	1,623
Proceeds from sales of premises and equipment		509
Purchases of premises and equipment	-1,768	-618
Proceeds from sale of other real estate	1,408	2,417
Net cash (used in) provided by investing activities	-120,388	21,960
Financing activities:
Net change in deposits	111,419	46,036
Net change in short-term borrowings	-6,540	69,834
Repayments of trust preferred securities	-15,998
Proceeds from FHLB advances	410,000	355,000
Repayments of FHLB advances	-410,000	-425,000
Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans	61	209
Proceeds from issuance of common stock, net of issuance costs		12,206
Retirement of preferred stock		-121,613
Cash dividends on common stock	-3,032
Cash dividends on preferred stock		-1,214
Net cash provided by (used in) financing activities	85,910	-64,542
Net change in cash and cash equivalents	-6,991	-15,557
Cash and cash equivalents at beginning of period	192,655	228,898
Cash and cash equivalents at end of period	185,664	213,341
Cash paid during the period for:
Interest	6,334	7,449
Income taxes	1,800	1,321
Unsettled securities purchases		34,437
Unsettled SBA loan Sales	3,671
Transfers of loans to foreclosed properties	$459	$4,367

Accounting_Policies

Accounting Policies	3 Months Ended
	Mar. 31, 2015
Summary Of Significant Accounting Policies [Abstract]
Accounting Policies	Note 1 – Accounting Policies
	The accounting and financial reporting policies of United Community Banks, Inc. (“United”) and its subsidiaries conform to accounting principles generally accepted in the United States of America (“GAAP”) and general banking industry practices.  The accompanying interim consolidated financial statements have not been audited.  All material intercompany balances and transactions have been eliminated.  A more detailed description of United’s accounting policies is included in its Annual Report on Form 10-K for the year ended December 31, 2014.
	In management’s opinion, all accounting adjustments necessary to accurately reflect the financial position and results of operations on the accompanying financial statements have been made. These adjustments are normal and recurring accruals considered necessary for a fair and accurate presentation. The results for interim periods are not necessarily indicative of results for the full year or any other interim periods.
	Certain 2014 amounts have been reclassified to conform to the 2015 presentation.

Accounting_Standards_Updates_a

Accounting Standards Updates and Recently Adopted Standards	3 Months Ended
	Mar. 31, 2015
Accounting Standards Updates [Abstract]
Accounting Standards Updates and Recently Adopted Standards	Note 2 –Accounting Standards Updates and Recently Adopted Standards
	In February 2015, the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, effective for fiscal years beginning after December 15, 2015 and interim periods within those years and early adoption is permitted. The new standard is intended to improve targeted areas of the consolidation guidance for legal entities such as limited partnerships, limited liability corporations, and securitization structures. The amendments in the ASU affect the consolidation evaluation for reporting organizations. In addition, the amendments in this ASU simplify and improve current GAAP by reducing the number of consolidation models. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.
	In April 2015, the FASB issued ASU No. 2015-03, Interest – Imputation of Interest (Subtopic 835-30) Simplifying the Presentation of Debt Issuance Costs. To simplify presentation of debt issuance costs, the amendments in this update require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability consistent with debt discounts.  The standard will be effective for the United’s fiscal year beginning after December 15, 2015 and subsequent interim periods. The adoption of ASU 2015-03 is not expected to have a material effect on the United’s consolidated financial statements.

Acquisition

Acquisition	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquisition	Note 3 – Acquisition
	On June 26, 2014, United completed the acquisition of substantially all of the assets of Business Carolina, Inc., a specialty Small Business Administration (“SBA”) / United States Department of Agriculture (“USDA”) lender headquartered in Columbia, South Carolina.  On the closing date, United paid $31.3 million in cash for loans having a fair value on the purchase date of $24.8 million, accrued interest of $83,000, servicing rights with a fair value on the purchase date of $2.13 million, premises and equipment with a fair value on the purchase date of $2.60 million and goodwill in the amount of $1.51 million representing the premium paid over the fair value of the separately identifiable assets and liabilities acquired.  The gross contractual amount of loans receivable was $28.0 million as of the acquisition date.  United has not identified any material separately identifiable intangible assets resulting from the acquisition.
	The loans and servicing assets that were acquired in this transaction were valued by a third party vendor that specializes in the valuations of these SBA related assets.  These assets are very illiquid and United does not have the same level of visibility into the inputs that the valuation vendor has.  Therefore, United considers those inputs to be level 3 in the Accounting Standards Codification (“ASC”) 820 hierarchy.  For the loans, the valuations were derived by estimating the expected cash flows using a combination of prepayment speed and default estimates.  The cash flows are then discounted using the rates implied by observed transactions in the market place.

Balance_Sheet_Offsetting

Balance Sheet Offsetting	3 Months Ended
	Mar. 31, 2015
Offsetting [Abstract]
Balance Sheet Offsetting	Note 4 – Balance Sheet Offsetting
	United enters into reverse repurchase agreements in order to invest short-term funds.  In addition, United enters into repurchase agreements and reverse repurchase agreements with the same counterparty in transactions commonly referred to as collateral swaps that are subject to master netting agreements under which the balances are netted in the balance sheet in accordance with ASC 210-20, Offsetting.
	The following table presents a summary of amounts outstanding under reverse repurchase agreements and derivative financial instruments including those entered into in connection with the same counterparty under master netting agreements as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
		Gross			Gross			Net Asset
		Amounts of Recognized			Amounts			Balance		Gross Amounts not Offset
		Assets			Offset on the					in the Balance Sheet
					Balance
	31-Mar-15				Sheet					Financial Instruments			Collateral			Net Amount
													Received
	Repurchase agreements / reverse repurchase agreements	$	345,000		$	(325,000	)	$	20,000	$	-		$	(21,048	)	$	-
	Derivatives		20,291			-			20,291		(597	)		(4,435	)		15,259
	Total	$	365,291		$	(325,000	)	$	40,291	$	(597	)	$	(25,483	)	$	15,259
	Weighted average interest rate of reverse repurchase agreements		1.18	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	325,000		$	(325,000	)	$	-	$	-		$	-		$	-
	Derivatives		29,276			-			29,276		(597	)		(31,407	)		-
	Total	$	354,276		$	(325,000	)	$	29,276	$	(597	)	$	(31,407	)	$	-
	Weighted average interest rate of repurchase agreements		0.3	%
		Gross			Gross			Net Asset
		Amounts of			Amounts			Balance		Gross Amounts not Offset
		Recognized			Offset on the					in the Balance Sheet
		Assets			Balance
	31-Dec-14				Sheet					Financial			Collateral			Net Amount
										Instruments			Received
	Repurchase agreements / reverse repurchase agreements	$	395,000		$	(375,000	)	$	20,000	$	-		$	(20,302	)	$	-
	Derivatives		20,599			-			20,599		(869	)		(3,716	)		16,014
	Total	$	415,599		$	(375,000	)	$	40,599	$	(869	)	$	(24,018	)	$	16,014
	Weighted average interest rate of reverse repurchase agreements		1.16	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	375,000		$	(375,000	)	$	-	$	-		$	-		$	-
	Derivatives		31,997			-			31,997		(869	)		(32,792	)		-
	Total	$	406,997		$	(375,000	)	$	31,997	$	(869	)	$	(32,792	)	$	-
	Weighted average interest rate of repurchase agreements		0.29	%
		Gross			Gross			Net Asset
		Amounts of			Amounts			Balance		Gross Amounts not Offset
		Recognized			Offset on the					in the Balance Sheet
		Assets			Balance
	31-Mar-14				Sheet					Financial			Collateral			Net Amount
										Instruments			Received
	Repurchase agreements / reverse repurchase agreements	$	397,000		$	(350,000	)	$	47,000	$	-		$	(51,243	)	$	-
	Derivatives		21,563			-			21,563		(3,896	)		(704	)		16,963
	Total	$	418,563		$	(350,000	)	$	68,563	$	(3,896	)	$	(51,947	)	$	16,963
	Weighted average interest rate of reverse repurchase agreements		1.09	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	350,000		$	(350,000	)	$	-	$	-		$	-		$	-
	Derivatives		42,309			-			42,309		(3,896	)		(35,754	)		2,659
	Total	$	392,309		$	(350,000	)	$	42,309	$	(3,896	)	$	(35,754	)	$	2,659
	Weighted average interest rate of repurchase agreements		0.28	%

Securities

Securities	3 Months Ended
	Mar. 31, 2015
Investment Securities [Abstract]
Securities	Note 5 – Securities
	The amortized cost basis, gross unrealized gains and losses and fair value of securities held-to-maturity at March 31, 2015, December 31, 2014 and March 31, 2014 are as follows (in thousands).
				Gross			Gross
		Amortized		Unrealized			Unrealized		Fair
	As of March 31, 2015	Cost		Gains			Losses		Value
	State and political subdivisions	$	48,136	$	4,029		$	-	$	52,165
	Mortgage-backed securities (1)		351,092		10,470			177		361,385
	Total	$	399,228	$	14,499		$	177	$	413,550
	As of December 31, 2014
	State and political subdivisions	$	48,157	$	3,504		$	-	$	51,661
	Mortgage-backed securities (1)		367,110		7,716			1,254		373,572
	Total	$	415,267	$	11,220		$	1,254	$	425,233
	As of March 31, 2014
	State and political subdivisions	$	51,257	$	3,430		$	13	$	54,674
	Mortgage-backed securities (1)		413,440		6,877			1,855		418,462
	Total	$	464,697	$	10,307		$	1,868	$	473,136
	(1) All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.
	The following table summarizes held-to-maturity securities in an unrealized loss position as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
		Less than 12 Months					12 Months or More				Total
	As of March 31, 2015	Fair Value		Unrealized			Fair Value		Unrealized		Fair Value		Unrealized
				Loss					Loss				Loss
	Mortgage-backed securities	$	16,177	$	140		$	6,252	$	37	$	22,429	$	177
	Total unrealized loss position	$	16,177	$	140		$	6,252	$	37	$	22,429	$	177
	As of December 31, 2014
	Mortgage-backed securities	$	126,514	$	917		$	17,053	$	337	$	143,567	$	1,254
	Total unrealized loss position	$	126,514	$	917		$	17,053	$	337	$	143,567	$	1,254
	As of March 31, 2014
	State and political subdivisions	$	1,628	$	13		$	-	$	-	$	1,628	$	13
	Mortgage-backed securities		200,284		1,721			1,644		134		201,928		1,855
	Total unrealized loss position	$	201,912	$	1,734		$	1,644	$	134	$	203,556	$	1,868
	Management evaluates securities for other-than-temporary impairment on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation.  Consideration is given to the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer, among other factors.  In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysts’ reports.  No impairment charges were recognized during the three months ended March 31, 2015 or 2014.
	The cost basis, unrealized gains and losses, and fair value of securities available-for-sale at March 31, 2015, December 31, 2014 and March 31, 2014 are presented below (in thousands).
				Gross			Gross
		Amortized		Unrealized			Unrealized		Fair
	As of March 31, 2015	Cost		Gains			Losses		Value
	U.S. Treasuries	$	47,661	$	753		$	-	$	48,414
	U.S. Government agencies		36,508		760			-		37,268
	State and political subdivisions		15,864		491			3		16,352
	Mortgage-backed securities (1)		1,023,809		20,986			3,681		1,041,114
	Corporate bonds		186,126		2,107			526		187,707
	Asset-backed securities		466,663		2,812			747		468,728
	Other		2,390		-			-		2,390
	Total	$	1,779,021	$	27,909		$	4,957	$	1,801,973
	As of December 31, 2014
	U.S. Treasuries	$	105,540	$	235		$	66	$	105,709
	U.S. Government agencies		36,474		-			175		36,299
	State and political subdivisions		19,748		504			19		20,233
	Mortgage-backed securities (1)		988,012		16,273			7,465		996,820
	Corporate bonds		165,018		1,686			1,076		165,628
	Asset-backed securities		455,626		2,257			1,955		455,928
	Other		2,117		-			-		2,117
	Total	$	1,772,535	$	20,955		$	10,756	$	1,782,734
	As of March 31, 2014
	State and political subdivisions	$	22,244	$	842		$	80	$	23,006
	Mortgage-backed securities (1)		1,126,227		13,213			11,328		1,128,112
	Corporate bonds		255,238		1,616			4,930		251,924
	Asset-backed securities		429,492		3,003			433		432,062
	Other		2,572		-			-		2,572
	Total	$	1,835,773	$	18,674		$	16,771	$	1,837,676
	(1) All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.
	The following table summarizes available-for-sale securities in an unrealized loss position as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
		Less than 12 Months					12 Months or More				Total
	As of March 31, 2015	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	State and political subdivisions	$	2,957	$	3		$	-	$	-	$	2,957	$	3
Mortgage-backed securities		51,339		363			219,027		3,318		270,366		3,681
Corporate bonds		10,474		526			-		-		10,474		526
Asset-backed securities		137,476		564			30,229		183		167,705		747
Total unrealized loss position	$	202,246	$	1,456		$	249,256	$	3,501	$	451,502	$	4,957
As of December 31, 2014
U.S. Treasuries	$	34,180	$	66		$	-	$	-	$	34,180	$	66
U.S. Government agencies		36,299		175			-		-		36,299		175
State and political subdivisions		2,481		19			-		-		2,481		19
Mortgage-backed securities		88,741		446			251,977		7,019		340,718		7,465
Corporate bonds		37,891		371			20,275		705		58,166		1,076
Asset-backed securities		221,359		1,592			40,952		363		262,311		1,955
Total unrealized loss position	$	420,951	$	2,669		$	313,204	$	8,087	$	734,155	$	10,756
As of March 31, 2014
State and political subdivisions	$	3,595	$	80		$	-	$	-	$	3,595	$	80
Mortgage-backed securities		342,886		3,817			186,290		7,511		529,176		11,328
Corporate bonds		82,337		2,393			75,320		2,537		157,657		4,930
Asset-backed securities		136,076		433			-		-		136,076		433
Total unrealized loss position	$	564,894	$	6,723		$	261,610	$	10,048	$	826,504	$	16,771
At March 31, 2015, there were 79 available-for-sale securities and 6 held-to-maturity securities that were in an unrealized loss position.  United does not intend to sell nor believes it will be required to sell securities in an unrealized loss position prior to the recovery of their amortized cost basis.  Unrealized losses at March 31, 2015, December 31, 2014 and March 31, 2014 were primarily attributable to changes in interest rates and therefore, United does not consider them to be impaired.
Realized gains and losses are derived using the specific identification method for determining the cost of securities sold. The following table summarizes securities sales activity for the three months ended March 31, 2015 and 2014 (in thousands).
	Three Months Ended
	March 31,
	2015		2014
Proceeds from sales	$	69,467	$	153,316
Gross gains on sales	$	1,539	$	410
Gross losses on sales		-		(193	)
Net gains on sales of securities	$	1,539	$	217
Income tax expense attributable to sales	$	598	$	92
Securities with a carrying value of $1.36 billion, $1.51 billion and $1.48 billion were pledged to secure public deposits and other secured borrowings at March 31, 2015, December 31, 2014 and March 31, 2014, respectively.
The amortized cost and fair value of held-to-maturity and available-for-sale securities at March 31, 2015, by contractual maturity, are presented in the following table (in thousands).
	Available-for-Sale					Held-to-Maturity
	Amortized Cost		Fair Value			Amortized Cost		Fair Value
US Treasuries:
1 to 5 years	$	47,661	$	48,414		$	-	$	-
		47,661		48,414			-		-
US Government agencies:
5 to 10 years		36,508		37,268			-		-
		36,508		37,268			-		-
State and political subdivisions:
Within 1 year		5,368		5,442			1,000		1,007
1 to 5 years		7,550		7,821			18,689		20,005
5 to 10 years		2,098		2,201			19,641		21,371
More than 10 years		848		888			8,806		9,782
		15,864		16,352			48,136		52,165
Corporate bonds:
1 to 5 years		37,870		38,009			-		-
5 to 10 years		115,749		117,333			-		-
More than 10 years		32,507		32,365			-		-
		186,126		187,707			-		-
Asset-backed securities:
1 to 5 years		247,650		249,360			-		-
5 to 10 years		58,575		59,053			-		-
More than 10 years		160,438		160,315			-		-
		466,663		468,728			-		-
Other:
Within 1 year		442		442			-		-
More than 10 years		1,948		1,948			-		-
		2,390		2,390			-		-
Total securities other than mortgage-backed securities:
Within 1 year		5,810		5,884			1,000		1,007
1 to 5 years		340,731		343,604			18,689		20,005
5 to 10 years		212,930		215,855			19,641		21,371
More than 10 years		195,741		195,516			8,806		9,782
Mortgage-backed securities		1,023,809		1,041,114			351,092		361,385
	$	1,779,021	$	1,801,973		$	399,228	$	413,550
Expected maturities may differ from contractual maturities because issuers and borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

Loans_and_Allowance_for_Loan_L

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2015
Loans and Allowance For Loan Losses [Abstract]
Loans and Allowance for Loan Losses	Note 6 – Loans and Allowance for Loan Losses
	Major classifications of loans as of March 31, 2015, December 31, 2014 and March 31, 2014, are summarized as follows (in thousands).
		March 31,				December 31,				March 31,
		2015				2014				2014
	Owner occupied commercial real estate	$	1,166,916			$	1,163,480			$	1,141,791
	Income producing commercial real estate		636,107				598,537				623,830
	Commercial & industrial		716,281				710,256				495,178
	Commercial construction		229,920				196,030				148,454
	Total commercial		2,749,224				2,668,303				2,409,253
	Residential mortgage		863,311				865,789				866,615
	Home equity lines of credit		465,474				465,872				446,705
	Residential construction		291,259				298,627				317,749
	Consumer installment		102,585				104,899				106,991
	Indirect auto		315,836				268,629				208,395
	Total loans		4,787,689				4,672,119				4,355,708
	Less allowance for loan losses		(70,007	)			(71,619	)			(75,223	)
	Loans, net	$	4,717,682			$	4,600,500			$	4,280,485
	At March 31, 2015, December 31, 2014 and March 31, 2014, loans totaling $2.28 billion, $2.35 billion and $2.07 billion, respectively, were pledged as collateral to secure FHLB advances and other contingent funding sources.
	The allowance for loan losses represents management’s estimate of probable incurred losses in the loan portfolio as of the end of the period.  The allowance for unfunded commitments is included in other liabilities in the consolidated balance sheet.  Combined, the allowance for loan losses and allowance for unfunded commitments are referred to as the allowance for credit losses.
	The following table presents the balance and activity in the allowance for credit losses by portfolio segment for the three months ended March 31, 2015 and 2014 (in thousands).
	Three Months Ended March 31, 2015	Beginning Balance				Charge-				Recoveries			Allocation				Provision			Ending
						Offs							of							Balance
													Unallocated
	Owner occupied commercial real estate	$	16,041			$	(368	)		$	11		$	-			$	(732	)	$	14,952
	Income producing commercial real estate		10,296				(248	)			7			-				(400	)		9,655
	Commercial & industrial		3,255				(469	)			128			-				528			3,442
	Commercial construction		4,747				(22	)			-			-				610			5,335
	Residential mortgage		20,311				(578	)			162			-				243			20,138
	Home equity lines of credit		4,574				(73	)			14			-				(194	)		4,321
	Residential construction		10,603				(1,140	)			79			-				668			10,210
	Consumer installment		731				(326	)			376			-				(68	)		713
	Indirect auto		1,061				(128	)			13			-				295			1,241
	Total allowance for loan losses		71,619				(3,352	)			790			-				950			70,007
	Allowance for unfunded commitments		1,930				-				-			-				850			2,780
	Total allowance for credit losses	$	73,549			$	(3,352	)		$	790		$	-			$	1,800		$	72,787
	Three Months Ended March 31, 2014	Beginning				Charge-				Recoveries			Allocation				Provision			Ending
		Balance				Offs							of							Balance
													Unallocated
	Owner occupied commercial real estate	$	17,164			$	(341	)		$	89		$	1,278			$	5,166		$	23,356
	Income producing commercial real estate		7,174				(231	)			-			688				231			7,862
	Commercial & industrial		6,527				(963	)			541			318				(2,176	)		4,247
	Commercial construction		3,669				-				-			388				(80	)		3,977
	Residential mortgage		15,446				(1,581	)			66			1,452				584			15,967
	Home equity lines of credit		5,528				(1,003	)			10			391				1,194			6,120
	Residential construction		12,532				(304	)			93			1,728				(1,868	)		12,181
	Consumer installment		1,353				(676	)			327			-				(287	)		717
	Indirect auto		1,126				(77	)			11			-				(264	)		796
	Unallocated		6,243				-				-			(6,243	)			-			-
	Total allowance for loan losses		76,762				(5,176	)			1,137			-				2,500			75,223
	Allowance for unfunded commitments		2,165				-				-			-				-			2,165
	Total allowance for credit losses	$	78,927			$	(5,176	)		$	1,137		$	-			$	2,500		$	77,388
	In the first quarter of 2014, United modified its allowance for loan losses methodology to incorporate a loss emergence period.  The increase in precision resulting from the use of the loss emergence period led to the full allocation of the portion of the allowance that had previously been unallocated.
	The following table represents the recorded investment in loans by portfolio segment and the balance of the allowance for loan losses assigned to each segment based on the method of evaluating the loans for impairment as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
		31-Mar-15											31-Dec-14									31-Mar-14
	Allowance for Loan Losses	Individually				Collectively				Ending			Individually				Collectively			Ending		Individually		Collectively		Ending
		evaluated for				evaluated for				Balance			evaluated for				evaluated for			Balance		evaluated for		evaluated for		Balance
		impairment				impairment							impairment				impairment					impairment
																								impairment
	Owner occupied commercial real estate	$	1,758			$	13,194			$	14,952		$	2,737			$	13,304		$	16,041	$	855	$	22,501	$	23,356
	Income producing commercial real estate		866				8,789				9,655			1,917				8,379			10,296		2,404		5,458		7,862
	Commercial & industrial		8				3,434				3,442			15				3,240			3,255		253		3,994		4,247
	Commercial construction		598				4,737				5,335			729				4,018			4,747		469		3,508		3,977
	Residential mortgage		3,174				16,964				20,138			3,227				17,084			20,311		3,079		12,888		15,967
	Home equity lines of credit		29				4,292				4,321			47				4,527			4,574		67		6,053		6,120
Residential construction		1,152				9,058				10,210			1,192				9,411			10,603		1,253		10,928		12,181
Consumer installment		9				704				713			18				713			731		19		698		717
Indirect auto		-				1,241				1,241			-				1,061			1,061		-		796		796
Total allowance for loan losses		7,594				62,413				70,007			9,882				61,737			71,619		8,399		66,824		75,223
Allowance for unfunded commitments		-				2,780				2,780			-				1,930			1,930		-		2,165		2,165
Total allowance for credit losses	$	7,594			$	65,193			$	72,787		$	9,882			$	63,667		$	73,549	$	8,399	$	68,989	$	77,388
Loans Outstanding
Owner occupied commercial real estate	$	36,835			$	1,130,081			$	1,166,916		$	34,654			$	1,128,826		$	1,163,480	$	29,051	$	1,112,740	$	1,141,791
Income producing commercial real estate		21,285				614,822				636,107			24,484				574,053			598,537		25,955		597,875		623,830
Commercial & industrial		3,977				712,304				716,281			3,977				706,279			710,256		4,167		491,011		495,178
Commercial construction		12,222				217,698				229,920			12,321				183,709			196,030		11,390		137,064		148,454
Residential mortgage		21,934				841,377				863,311			18,775				847,014			865,789		21,303		845,312		866,615
Home equity lines of credit		478				464,996				465,474			478				465,394			465,872		505		446,200		446,705
Residential construction		10,027				281,232				291,259			11,604				287,023			298,627		12,409		305,340		317,749
Consumer installment		148				102,437				102,585			179				104,720			104,899		340		106,651		106,991
Indirect auto		-				315,836				315,836			-				268,629			268,629		-		208,395		208,395
Total loans	$	106,906			$	4,680,783			$	4,787,689		$	106,472			$	4,565,647		$	4,672,119	$	105,120	$	4,250,588	$	4,355,708
Management considers all loans that are on nonaccrual with a balance of $500,000 or greater and all troubled debt restructurings (“TDRs”) to be impaired.  In addition, management reviews all accruing substandard loans greater than $2 million to determine if the loan is impaired.  A loan is considered impaired when, based on current events and circumstances, it is probable that all amounts due according to the original contractual terms of the loan will not be collected.  All TDRs are considered impaired regardless of accrual status.  Impairment is measured based on the present value of expected future cash flows, discounted at the loan’s effective interest rate, the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent.  For TDRs less than $500,000, impairment is estimated based on the average impairment of TDRs greater than $500,000 by loan category.  For loan types that do not have TDRs greater than $500,000, the average impairment for all TDR loans is used to quantify the amount of required specific reserve.  A specific reserve is established for impaired loans for the amount of calculated impairment.  Interest payments received on impaired nonaccrual loans are applied as a reduction of the outstanding principal balance.  For impaired loans not on nonaccrual status, interest is accrued according to the terms of the loan agreement.  Loans are evaluated for impairment quarterly and specific reserves are established in the allowance for loan losses for any measured impairment.
Each quarter, United’s management prepares an analysis of the allowance for credit losses to determine the appropriate balance that measures and quantifies the amount of probable incurred losses in the loan portfolio. The allowance is comprised of specific reserves on individually impaired loans, which are determined as described above, and general reserves which are determined based on historical loss experience as adjusted for current trends and economic conditions multiplied by a loss emergence period factor. Management uses eight quarters of historical loss experience to determine the loss factors to be used in the reserve calculation for loans evaluated in the aggregate. Eight quarters has been determined to be an appropriate time period as it is recent enough to be relevant to current conditions and covers a length of time sufficient to minimize distortions caused by nonrecurring and unusual activity that might otherwise influence a shorter time period. In previous years, the loss rates were weighted toward more recent quarters by multiplying each quarter’s annualized historical net charge-off rate by 1 through 8, with 8 representing the most recent quarter and 1 representing the oldest quarter. Management adopted this method of weighting quarterly loss rates to capture the rapidly deteriorating credit conditions in its loss factors during the financial crisis. In the first quarter of 2014, in light of stabilizing credit conditions, management concluded that it was appropriate to apply a more level weighting to capture the full range and impacts of credit losses experienced during the most recent economic and credit cycle. For the four quarters of 2014, management applied a weighting factor of 1.75 to the most recent four quarters and a weighting of 1.00 for the four oldest quarters. Beginning with the first quarter of 2015, management began applying equal weight to all eight quarters to capture the full range of the loss cycle. Management believes the current weightings are more appropriate to measure the probable losses incurred within the loan portfolio.
Also, beginning in the first quarter of 2014, management updated its method for measuring the loss emergence period in the calculation of the allowance for credit losses.  The rapidly deteriorating credit conditions during the peak of the credit cycle shortened the length of time between management’s estimation of the incurrence of a loss and its recognition as a charge-off.  In most cases, the loss emergence period was within a twelve month period which made the use of annualized loss factors appropriate for measuring the amount of incurred yet unconfirmed credit losses within the loan portfolio.  As United has moved out beyond the peak of the financial crisis, management has observed that the loss emergence period has extended.  Management calculates the loss emergence period for each pool of loans based on the average length of time between the date a loan first exceeds 30 days past due and the date the loan is charged off.
The updates to the weightings to the eight quarters of loss history and the update to our estimation of the loss emergence period did not have a material effect on the total allowance for loan losses or the provision for loan losses, however, the revised loss emergence period resulted in the full allocation of the previously unallocated portion of the allowance for loan losses.
On junior lien home equity loans, management has limited ability to monitor the delinquency status of the first lien unless the first lien is also held by United.  As a result, management applies the weighted average historical loss factor for this category and appropriately adjusts it to reflect the increased risk of loss from these credits.
Management carefully reviews the resulting loss factors for each category of the loan portfolio and evaluates whether qualitative adjustments are necessary to take into consideration recent credit trends such as increases or decreases in past due, nonaccrual, criticized and classified loans, and other macro environmental factors such as changes in unemployment rates, lease vacancy rates and trends in property values and absorption rates.
Management believes that its method of determining the balance of the allowance for credit losses provides a reasonable and reliable basis for measuring and reporting losses that are incurred in the loan portfolio as of the reporting date.
When a loan officer determines that a loan is uncollectible, he or she is responsible for recommending that the loan be charged off.  Full or partial charge-offs may also be recommended by the Collections Department, the Special Assets Department and the Foreclosure/OREO Department.  Nonaccrual real estate loans that are collateral dependent are generally charged down to 80% of the appraised value of the underlying collateral at the time they are placed on nonaccrual status.
A committee consisting of the Chief Credit Officer, Senior Risk Officers and the Senior Credit Officers meets monthly to review charge-offs that have occurred during the previous month.
Generally, closed-end retail loans (installment and residential mortgage loans) past due 90 cumulative days are written down to their collateral value less estimated selling costs unless the loan is well secured and in process of collection (within the next 90 days).  Open-end (revolving) unsecured retail loans which are past due 90 cumulative days from their contractual due date are generally charged off.
The following table presents loans individually evaluated for impairment by class of loans as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
	31-Mar-15											31-Dec-14									31-Mar-14
									Allowance										Allowance						Allowance
	Unpaid								for Loan			Unpaid							for Loan		Unpaid				for Loan
	Principal				Recorded				Losses			Principal				Recorded			Losses		Principal		Recorded		Losses
	Balance				Investment				Allocated			Balance				Investment			Allocated		Balance		Investment		Allocated
With no related allowance recorded:
Owner occupied commercial real estate	$	17,214			$	15,968			$	-		$	12,025			$	11,325		$	-	$	18,141	$	14,034	$	-
Income producing commercial real estate		8,645				8,502				-			8,311				8,311			-		6,575		3,816		-
Commercial & industrial		1,677				1,040				-			1,679				1,042			-		2,417		1,851		-
Commercial construction		-				-				-			-				-			-		390		390		-
Total commercial		27,536				25,510				-			22,015				20,678			-		27,523		20,091		-
Residential mortgage		3,411				1,793				-			2,569				1,472			-		7,292		5,364		-
Home equity lines of credit		-				-				-			-				-			-		-		-		-
Residential construction		3,003				2,639				-			4,338				3,338			-		6,474		5,174		-
Consumer installment		-				-				-			-				-			-		82		82		-
Indirect auto		-				-				-			-				-			-		-		-		-
Total with no related allowance recorded		33,950				29,942				-			28,922				25,488			-		41,371		30,711		-
With an allowance recorded:
Owner occupied commercial real estate		22,494				20,867				1,758			24,728				23,329			2,737		15,157		17,072		855
Income producing commercial real estate		12,789				12,783				866			16,352				16,173			1,917		24,220		20,084		2,404
Commercial & industrial		2,945				2,937				8			2,936				2,935			15		2,598		2,316		253
Commercial construction		12,302				12,222				598			12,401				12,321			729		11,079		11,000		469
Total commercial		50,530				48,809				3,230			56,417				54,758			5,398		53,054		50,472		3,981
Residential mortgage		21,872				20,141				3,174			17,732				17,303			3,227		16,688		15,939		3,079
Home equity lines of credit		478				478				29			478				478			47		505		505		67
Residential construction		9,180				7,388				1,152			8,962				8,266			1,192		8,615		7,235		1,253
Consumer installment		151				148				9			179				179			18		360		258		19
Indirect auto		-				-				-			-				-			-		-		-		-
Total with an allowance recorded		82,211				76,964				7,594			83,768				80,984			9,882		79,222		74,409		8,399
Total	$	116,161			$	106,906			$	7,594		$	112,690			$	106,472		$	9,882	$	120,593	$	105,120	$	8,399
There were no loans more than 90 days past due and still accruing interest at March 31, 2015, December 31, 2014 or March 31, 2014.  Nonaccrual loans include both homogeneous loans that are collectively evaluated for impairment and individually evaluated impaired loans.  United’s policy is to place loans on nonaccrual status when, in the opinion of management, the principal and interest on a loan is not likely to be repaid in accordance with the loan terms or when the loan becomes 90 days past due and is not well secured and in the process of collection.  When a loan is classified on nonaccrual status, interest previously accrued but not collected is reversed against current interest revenue.  Principal and interest payments received on a nonaccrual loan are applied to reduce outstanding principal.
The gross additional interest revenue that would have been earned if the loans classified as nonaccrual had performed in accordance with the original terms was approximately $260,000 and $460,000 for the three months ended March 31, 2015 and 2014, respectively.  The gross additional interest revenue that would have been earned for the three months ended March 31, 2015 and 2014 had performing TDRs performed in accordance with the original terms is immaterial.
The average balances of impaired loans and income recognized on impaired loans while they were considered impaired are presented below for the three months ended March 31, 2015 and 2014 (in thousands).
	2015											2014
					Interest											Interest
					Revenue				Cash Basis							Revenue			Cash Basis
					Recognized				Interest							Recognized			Interest
	Average				During				Revenue			Average				During			Revenue
	Balance				Impairment				Received			Balance				Impairment			Received
Owner occupied commercial real estate	$	36,989			$	460			$	459		$	29,109			$	358		$	380
Income producing commercial real estate		21,424				267				275			25,860				312			333
Commercial & industrial		4,023				38				37			4,560				53			51
Commercial construction		12,273				116				121			12,714				112			135
Total commercial		74,709				881				892			72,243				835			899
Residential mortgage		22,085				226				233			21,321				229			238
Home equity lines of credit		478				5				5			505				5			6
Residential construction		10,575				120				126			13,037				145			150
Consumer installment		153				3				3			448				6			9
Indirect auto		-				-				-			-				-			-
Total	$	108,000			$	1,235			$	1,259		$	107,554			$	1,220		$	1,302
The following table presents the recorded investment (unpaid principal less amounts charged off) in nonaccrual loans by loan class as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
	Nonaccrual Loans
	March 31,				December 31,				March 31,
	2015				2014				2014
Owner occupied commercial real estate	$	4,360			$	4,133			$	3,868
Income producing commercial real estate		835				717				1,278
Commercial & industrial		1,629				1,571				822
Commercial construction		60				83				479
Total commercial		6,884				6,504				6,447
Residential mortgage		8,669				8,196				13,307
Home equity lines of credit		693				695				1,106
Residential construction		2,127				2,006				3,805
Consumer installment		142				134				291
Indirect auto		500				346				294
Total	$	19,015			$	17,881			$	25,250
The following table presents the aging of the recorded investment in past due loans as of March 31, 2015, December 31, 2014 and March 31, 2014 by class of loans (in thousands).
	Loans Past Due															Loans Not
As of March 31, 2015	30 - 59 Days				60 - 89 Days				> 90 Days			Total				Past Due			Total
Owner occupied commercial real estate	$	1,965			$	1,130			$	1,573		$	4,668			$	1,162,248		$	1,166,916
Income producing commercial real estate		62				-				440			502				635,605			636,107
Commercial & industrial		790				1,001				1,405			3,196				713,085			716,281
Commercial construction		-				-				44			44				229,876			229,920
Total commercial		2,817				2,131				3,462			8,410				2,740,814			2,749,224
Residential mortgage		4,290				1,566				2,558			8,414				854,897			863,311
Home equity lines of credit		1,470				762				86			2,318				463,156			465,474
Residential construction		1,018				1,343				245			2,606				288,653			291,259
Consumer installment		485				61				80			626				101,959			102,585
Indirect auto		261				133				202			596				315,240			315,836
Total loans	$	10,341			$	5,996			$	6,633		$	22,970			$	4,764,719		$	4,787,689
As of December 31, 2014
Owner occupied commercial real estate	$	1,444			$	1,929			$	1,141		$	4,514			$	1,158,966		$	1,163,480
Income producing commercial real estate		2,322				1,172				-			3,494				595,043			598,537
Commercial & industrial		302				40				1,425			1,767				708,489			710,256
Commercial construction		-				-				66			66				195,964			196,030
Total commercial		4,068				3,141				2,632			9,841				2,658,462			2,668,303
Residential mortgage		5,234				2,931				3,278			11,443				854,346			865,789
Home equity lines of credit		961				303				167			1,431				464,441			465,872
Residential construction		1,172				268				1,395			2,835				295,792			298,627
Consumer installment		607				136				33			776				104,123			104,899
Indirect auto		200				146				141			487				268,142			268,629
Total loans	$	12,242			$	6,925			$	7,646		$	26,813			$	4,645,306		$	4,672,119
	Loans Past Due															Loans Not
As of March 31, 2014	30 - 59 Days				60 - 89 Days				> 90 Days			Total				Past Due			Total
Owner occupied commercial real estate	$	1,265			$	187			$	1,276		$	2,728			$	1,139,063		$	1,141,791
Income producing commercial real estate		1,045				1,259				589			2,893				620,937			623,830
Commercial & industrial		1,468				231				589			2,288				492,890			495,178
Commercial construction		313				46				366			725				147,729			148,454
Total commercial		4,091				1,723				2,820			8,634				2,400,619			2,409,253
Residential mortgage		7,295				3,520				4,806			15,621				850,994			866,615
Home equity lines of credit		1,554				551				502			2,607				444,098			446,705
Residential construction		1,440				30				782			2,252				315,497			317,749
Consumer installment		677				495				60			1,232				105,759			106,991
Indirect auto		263				179				137			579				207,816			208,395
Total loans	$	15,320			$	6,498			$	9,107		$	30,925			$	4,324,783		$	4,355,708
As of March 31, 2015, December 31, 2014, and March 31, 2014, $7.12 million, $9.72 million and $8.25 million, respectively, of specific reserves were allocated to customers whose loan terms have been modified in TDRs.  United committed to lend additional amounts totaling up to $36,000, $51,000 and $12,000 as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively, to customers with outstanding loans that are classified as TDRs.
The modification of the terms of the TDRs included one or a combination of the following:  a reduction of the stated interest rate of the loan or an extension of the amortization period that would not otherwise be considered in the current market for new debt with similar risk characteristics; a permanent reduction of the principal amount; a restructuring of the borrower’s debt into an “A/B note structure” where the A note would fall within the borrower’s ability to pay and the remainder would be included in the B note, or a mandated bankruptcy restructuring.
The following table presents information on TDRs including the number of loan contracts restructured and the pre- and post-modification recorded investment as of March 31, 2015, December 31, 2014 and March 31, 2014 (dollars in thousands).
	31-Mar-15											31-Dec-14									31-Mar-14
					Pre-				Post-							Pre-			Post-				Pre-		Post-
					Modification				Modification							Modification			Modification				Modification		Modification
	Number				Outstanding				Outstanding			Number				Outstanding			Outstanding		Number		Outstanding		Outstanding
	of				Recorded				Recorded			of				Recorded			Recorded		of		Recorded		Recorded
	Contracts				Investment				Investment			Contracts				Investment			Investment		Contracts		Investment		Investment
Owner occupied commercial real estate		52			$	30,600			$	29,201			54			$	27,695		$	26,296		46	$	24,194	$	22,471
Income producing commercial real estate		28				14,525				14,525			31				18,094			17,915		32		20,936		18,488
Commercial & industrial		32				2,902				2,902			32				2,848			2,847		35		3,574		3,292
Commercial construction		14				11,268				11,188			14				11,360			11,280		14		11,678		11,598
Total commercial		126				59,295				57,816			131				59,997			58,338		127		60,382		55,849
Residential mortgage		162				21,343				20,600			154				18,630			17,836		148		21,163		19,657
Home equity lines of credit		2				478				478			2				478			478		3		505		505
Residential construction		47				8,824				7,388			48				8,962			8,265		52		10,400		9,518
Consumer installment		17				148				148			17				179			179		26		442		340
Indirect auto		-				-				-			-				-			-		-		-		-
Total loans		354				90,088				86,430			352				88,246		$	85,096		356		92,892		85,869
Loans modified under the terms of a TDR during the three months ended March 31, 2015 and 2014 are presented in the table below.  In addition, the following table presents loans modified under the terms of a TDR that became 90 days or more delinquent during the three months ended March 31, 2015 and 2014, that were initially restructured within one year prior to becoming delinquent (dollars in thousands).
												Troubled Debt Restructurings
												Modified Within the Previous
												Twelve Months that Have
					Pre-				Post-			Subsequently Defaulted During
				Modification				Modification				the Three Months Ended
				Outstanding				Outstanding				March 31, 2015
New Troubled Debt Restructurings for	Number of				Recorded				Recorded			Number of			Recorded
the Three Months Ended March 31, 2015	Contracts				Investment				Investment			Contracts			Investment
Owner occupied commercial real estate		2			$	4,497			$	4,497			-			$	-
Income producing commercial real estate		2				255				255			-				-
Commercial & industrial		2				188				188			-				-
Commercial construction		-				-				-			-				-
Total commercial		6				4,940				4,940			-				-
Residential mortgage		15				1,598				1,598			-				-
Home equity lines of credit		-				-				-			-				-
Residential construction		-				-				-			-				-
Consumer installment		1				3				3			1				30
Indirect auto		-				-				-			-				-
Total loans		22			$	6,541			$	6,541			1			$	30
												Troubled Debt Restructurings
												Modified Within the Previous
												Twelve Months that Have
					Pre-				Post-			Subsequently Defaulted During
				Modification				Modification				the Three Months Ended
				Outstanding				Outstanding				31-Mar-14
New Troubled Debt Restructurings for	Number of				Recorded				Recorded			Number of			Recorded
the Three Months Ended March 31, 2014	Contracts				Investment				Investment			Contracts			Investment
Owner occupied commercial real estate		2			$	605			$	605			1			$	104
Income producing commercial real estate		2				533				533			-				-
Commercial & industrial		1				224				224			2				54
Commercial construction		1				231				231			-				-
Total commercial		6				1,593				1,593			3				158
Residential mortgage		14				1,132				1,132			4				452
Home equity lines of credit		-				-				-			-				-
Residential construction		-				-				-			-				-
Consumer installment		2				142				142			-				-
Indirect auto		-				-				-			-				-
Total loans		22			$	2,867			$	2,867			7			$	610
Collateral dependent TDRs that subsequently default and are placed on nonaccrual are charged down to the fair value of the collateral consistent with United’s policy for nonaccrual loans.  Impairment on TDRs that are not collateral dependent continues to be measured on discounted cash flows regardless of whether the loan has subsequently defaulted.
As of March 31, 2015, December 31, 2014 and March 31, 2014, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows (in thousands).
									Substandard							Doubtful /
As of March 31, 2015	Pass				Watch				Performing			Nonaccrual				Loss			Total
Owner occupied commercial real estate	$	1,097,075			$	21,594			$	43,887		$	4,360			$	-		$	1,166,916
Income producing commercial real estate		600,976				14,415				19,881			835				-			636,107
Commercial & industrial		704,714				3,234				6,704			1,629				-			716,281
Commercial construction		223,810				2,522				3,528			60				-			229,920
Total commercial		2,626,575				41,765				74,000			6,884				-			2,749,224
Residential mortgage		813,075				11,185				30,382			8,669				-			863,311
Home equity lines of credit		458,577				470				5,734			693				-			465,474
Residential construction		275,567				4,061				9,504			2,127				-			291,259
Consumer installment		101,142				-				1,301			142				-			102,585
Indirect auto		314,540				-				796			500				-			315,836
Total loans	$	4,589,476			$	57,481			$	121,717		$	19,015			$	-		$	4,787,689
As of December 31, 2014
Owner occupied commercial real estate	$	1,094,057			$	18,889			$	46,401		$	4,133			$	-		$	1,163,480
Income producing commercial real estate		560,559				16,701				20,560			717				-			598,537
Commercial & industrial		696,805				4,017				7,863			1,571				-			710,256
Commercial construction		190,070				2,311				3,566			83				-			196,030
Total commercial		2,541,491				41,918				78,390			6,504				-			2,668,303
Residential mortgage		814,168				11,594				31,831			8,196				-			865,789
Home equity lines of credit		459,881				-				5,296			695							465,872
Residential construction		280,166				5,535				10,920			2,006				-			298,627
Consumer installment		103,383				-				1,382			134				-			104,899
Indirect auto		267,709				-				574			346				-			268,629
Total loans	$	4,466,798			$	59,047			$	128,393		$	17,881			$	-		$	4,672,119
As of March 31, 2014
Owner occupied commercial real estate	$	1,059,528			$	30,869			$	47,525		$	3,868			$	-		$	1,141,791
Income producing commercial real estate		577,771				7,982				36,800			1,278				-			623,830
Commercial & industrial		481,310				4,905				8,141			822				-			495,178
Commercial construction		138,560				4,134				5,281			479				-			148,454
Total commercial		2,257,169				47,890				97,747			6,447				-			2,409,253
Residential mortgage		799,145				10,591				43,572			13,307				-			866,615
Home equity lines of credit		437,908				29				7,662			1,106				-			446,705
Residential construction		292,032				8,935				12,977			3,805				-			317,749
Consumer installment		104,379				11				2,310			291				-			106,991
Indirect auto		207,504				-				597			294				-			208,395
Total loans	$	4,098,137			$	67,456			$	164,865		$	25,250			$	-		$	4,355,708
Risk Ratings
United categorizes commercial loans into risk categories based on relevant information about the ability of borrowers to service their debt such as:  current financial information, historical payment experience, credit documentation, public information, and current industry and economic trends, among other factors.  United analyzes loans individually by classifying the loans as to credit risk.  This analysis is performed on a continual basis.  United uses the following definitions for its risk ratings:
Watch.  Loans in this category are presently protected from apparent loss; however, weaknesses exist that could cause future impairment, including the deterioration of financial ratios, past due status and questionable management capabilities.  These loans require more than the ordinary amount of supervision. Collateral values generally afford adequate coverage, but may not be immediately marketable.
Substandard.  These loans are inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged.  Specific and well-defined weaknesses exist that may include poor liquidity and deterioration of financial ratios.  The loan may be past due and related deposit accounts experiencing overdrafts.  There is the distinct possibility that United will sustain some loss if deficiencies are not corrected. If possible, immediate corrective action is taken.
Doubtful.  Specific weaknesses characterized as Substandard that are severe enough to make collection in full highly questionable and improbable.  There is no reliable secondary source of full repayment.
Loss.  Loans categorized as Loss have the same characteristics as Doubtful; however, probability of loss is certain.  Loans classified as Loss are charged off.
Consumer Purpose Loans.  United applies a pass / fail grading system to all consumer purpose loans.  Under the pass / fail grading system, consumer purpose loans meeting the criteria of substandard are classified as “fail” and all other loans are classified as “pass”.  For reporting purposes, consumer purpose loans classified as “fail” are reported in the performing substandard or nonaccrual columns and all other consumer purpose loans are reported in the “pass” column.  Loan balances reported in the “watch” column for residential mortgage are generally commercial purpose loans secured by the borrower’s residence.
Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans.

SBA_Servicing_Rights

SBA Servicing Rights	3 Months Ended
	Mar. 31, 2015
Transfers and Servicing [Abstract]
SBA Servicing Rights	Note 7 – SBA Servicing Rights
	United accounts for SBA servicing rights at fair value and is included in other assets.  Changes in the balances of servicing assets and servicing liabilities subsequently measured using the fair value measurement method for the three months ended March 31, 2015, are recorded as follows (in thousands).
	ASC 860 Servicing Asset Rollforward
	Fair value as of January 1, 2015	$	2,551
	Additions:
	Originated servicing rights capitalized upon sale of loans		190
	Subtractions:
	Disposals		-
	Changes in fair value:
	Due to change in valuation inputs or assumptions used in the valuation model		(24	)
	Fair value as of March 31, 2015	$	2,717
	A summary of the key characteristics, inputs, and economic assumptions used to estimate the fair value of the Company’s SBA Servicing Asset as of March 31, 2015 and December 31, 2014, and the sensitivity of the fair values to immediate adverse changes in those assumptions are shown in the table below (in thousands).
		March 31,			December 31,
		2015			2014
	Fair value of retained Servicing Assets	$	2,717		$	2,551
	Prepayment rate assumption		7.26	%		6.7	%
	10% adverse change	$	(75	)	$	(62	)
	20% adverse change	$	(146	)	$	(122	)
	Discount rate		11.1	%		12	%
	100 bps adverse change	$	(101	)	$	(85	)
	200bps adverse change	$	(196	)	$	(164	)
	Weighted-average life (months)		7.1			6.5
	Weighted-average gross margin		2.13	%		2	%

Reclassifications_Out_of_Accum

Reclassifications Out of Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]
Reclassifications Out of Accumulated Other Comprehensive Income	Note 8 – Reclassifications Out of Accumulated Other Comprehensive Income
	The following table presents the details regarding amounts reclassified out of accumulated other comprehensive income for the three months ended March 31, 2015 and 2014 (in thousands).
		Amounts Reclassified from
			Accumulated Other
			Comprehensive Income
		For the three months ended
	Details about Accumulated Other		March 31,						Affected Line Item in the Statement
	Comprehensive Income Components		2015			2014			Where Net Income is Presented
	Realized gains on sales of available-for-sale securities:
			$	1,539		$	217		Securities gains, net
				(598	)		(92	)	Tax expense
			$	941		$	125		Net of tax
	Amortization of (losses) gains included in net income on available-for-sale securities transferred to held to maturity:
			$	(484	)	$	(330	)	Investment securities interest revenue
				182			123		Tax benefit (expense)
			$	(302	)	$	(207	)	Net of tax
	Gains included in net income on derivative financial instruments accounted for as cash flow hedges:
	Effective portion of interest rate contracts		$	-		$	(97	)	Time deposit interest expense
	Amortization of losses on de-designated positions			(48	)		-		Deposits in banks and short-term investments interest revenue
	Amortization of losses on de-designated positions			(119	)		-		Money market deposit interest expense
	Amortization of losses on de-designated positions			(258	)		-		Federal Home Loan Bank advances interest expense
				(425	)		(97	)	Total before tax
				165			38		Tax or benefit (expense)
			$	(260	)	$	(59	)	Net of tax
	Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan
	Prior service cost		$	(91	)	$	(91	)	Salaries and employee benefits expense
	Actuarial losses			(68	)		-		Salaries and employee benefits expense
				(159	)		(91	)	Total before tax
				62			35		Tax benefit
			$	(97	)	$	(56	)	Net of tax
	Total reclassifications for the period		$	282		$	(197	)	Net of tax
	Amounts shown above in parentheses reduce earnings

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Note 9 – Earnings Per Share
	United is required to report on the face of the consolidated statement of income, earnings per common share with and without the dilutive effects of potential common stock issuances from instruments such as options, convertible securities and warrants. Basic earnings per common share is based on the weighted average number of common shares outstanding during the period while the effects of potential common shares outstanding during the period are included in diluted earnings per common share.
	During the three months ended March 31, 2015 and 2014, United accrued dividends on preferred stock, including accretion of discounts, as shown in the following table (in thousands).
		Three Months Ended
		March 31,
		2015		2014
	Series B - 5% fixed until December 6, 2013, 9% thereafter	$	-	$	159
	Series D - LIBOR plus 9.6875%, resets quarterly		-		280
	Total preferred stock dividends	$	-	$	439
	All preferred stock dividends are payable quarterly.
	Series B preferred stock was issued at a discount. Dividend amounts shown include discount accretion for each period.
	The preferred stock dividends were subtracted from net income in order to arrive at net income available to common shareholders.  All of United’s preferred stock was redeemed during the first quarter of 2014.
	The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2015 and 2014 (in thousands, except per share data).
		Three Months Ended
		March 31,
		2015		2014
	Net income available to common shareholders	$	17,670	$	14,961
	Weighted average shares outstanding:
	Basic		60,905		60,059
	Effect of dilutive securities
	Stock options		4		2
	Diluted		60,909		60,061
	Net income per common share:
	Basic	$	0.29	$	0.25
	Diluted	$	0.29	$	0.25
	At March 31, 2015, United had the following potentially dilutive stock options and warrants outstanding:  a warrant to purchase 219,909 shares of common stock at $61.40 per share; 301,344 shares of common stock issuable upon exercise of stock options granted to employees with a weighted average exercise price of $93.01; and 773,304 shares of common stock issuable upon completion of vesting of restricted stock unit awards.
	At March 31, 2014, United had the following potentially dilutive stock options and warrants outstanding: a warrant to purchase 219,909 common shares at $61.40 per share originally issued to the U.S. Treasury; 348,860 common shares issuable upon exercise of stock options granted to employees with a weighted average exercise price of $98.02; 1.10 million shares issuable upon completion of vesting of restricted stock unit awards; and warrants to purchase common stock equivalent junior preferred stock that would be convertible into 1,411,765 common shares exercisable at $21.25 per share granted to Fletcher International Ltd. (“Fletcher”) in connection with a 2010 asset purchase and sale agreement.  United repurchased the warrant from Fletcher in the fourth quarter of 2014.

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2015
Derivatives and Hedging Activities [Abstract]
Derivatives and Hedging Activities	Note 10 – Derivatives and Hedging Activities
	Risk Management Objective of Using Derivatives
	United is exposed to certain risks arising from both its business operations and economic conditions.  United principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. United manages interest rate risk primarily by managing the amount, sources, and duration of its investment securities portfolio and wholesale funding and through the use of derivative financial instruments.  Specifically, United enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates.  United’s derivative financial instruments are used to manage differences in the amount, timing, and duration of United’s known or expected cash receipts and its known or expected cash payments principally related to United’s loans, investment securities, wholesale borrowings and deposits.
	In conjunction with the FASB’s fair value measurement guidance, United made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a gross basis.
	The table below presents the fair value of United’s derivative financial instruments as well as their classification on the consolidated balance sheet as of March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
	Derivatives designated as hedging instruments under ASC 815
					Fair Value
			Balance Sheet		March 31,			December 31,				March 31,
	Interest Rate Products		Location		2015				2014			2014
	Cash flow hedge of money market deposits		Other assets		$	-			$	-		$	2,971
	Fair value hedge of brokered CD’s		Other assets			5				-			-
	Fair value hedge of corporate bonds		Other assets			-				-			2,655
					$	5			$	-		$	5,626
	Cash flow hedge of short-term debt		Other liabilities		$	-			$	-		$	3,650
	Cash flow hedge of money market deposits		Other liabilities			-				350			678
	Fair value hedge of AFS security		Other liabilities			345				-			-
	Fair value hedge of brokered CD’s		Other liabilities			3,452				5,817			14,119
	Fair value hedge of corporate bonds		Other liabilities			-				-			2,729
					$	3,797			$	6,167		$	21,176
	Derivatives not designated as hedging instruments under ASC 815
					Fair Value
			Balance Sheet		March 31,				December 31,			March 31,
	Interest Rate Products		Location		2015				2014			2014
	Customer swap positions		Other assets		$	5,043			$	3,433		$	1,359
	Dealer offsets to customer swap positions		Other assets			-				128			825
	Bifurcated embedded derivatives		Other assets			8,117				12,262			13,753
	Offsetting positions for de-designated cash flow hedges		Other assets			7,126				4,776			-
					$	20,286			$	20,599		$	15,937
	Customer swap positions		Other liabilities		$	-			$	129		$	825
	Dealer offsets to customer swap positions		Other liabilities			5,107				3,456			1,377
	Dealer offsets to bifurcated embedded derivatives		Other liabilities			13,244				17,467			18,931
	De-designated cash flow hedges		Other liabilities			7,128				4,778			-
					$	25,479			$	25,830		$	21,133
	Derivative contracts that are not accounted for as hedging instruments under ASC 815, Derivatives and Hedging, and are described as “customer derivatives,” are between United and certain commercial loan customers with offsetting positions to dealers under a back-to-back swap program.  United also has three interest rate swap contracts that are not designated as hedging instruments but are economic hedges of market linked brokered certificates of deposit.  The market linked brokered certificates of deposit contain embedded derivatives that are bifurcated from the host instruments and marked to market through earnings.  The marks on the market linked swaps and the bifurcated embedded derivatives tend to move in opposite directions with changes in 90-day LIBOR and therefore provide an effective economic hedge.
	Cash Flow Hedges of Interest Rate Risk
	United’s objectives in using interest rate derivatives are to add stability to net interest revenue and to manage its exposure to interest rate movements. To accomplish this objective, United uses interest rate swaps as part of its interest rate risk management strategy. United’s interest rate swaps designated as cash flow hedges involved the payment of fixed-rate amounts to a counterparty in exchange for United receiving variable-rate payments over the life of the agreements without exchange of the underlying notional amount. United’s cash flow hedges were for the purpose of converting variable rate deposits and wholesale borrowings to the economic equivalent of a fixed rate to protect United in a rising rate environment. At March 31, 2015 United did not have any active cash flow hedges. At December 31, 2014, United had one swap contract outstanding with a total notional amount of $175 million that was designated as a cash flow hedge of indexed money market accounts. At March 31, 2014, United had three swap contracts outstanding with a total notional amount of $200 million that were designated as cash flow hedges of future issuances of three-month brokered deposits or other LIBOR based floating rate wholesale borrowings, and three swap contracts outstanding with a total notional amount of $375 million that were designated as cash flow hedges of indexed money market accounts. During the second and fourth quarters of 2014, United de-designated swaps with a notional of $500 million and put on offsetting positions which had a similar effect to terminating the positions. In addition, in the first quarter of 2015, United terminated its one remaining cash flow hedge with a notional of $175 million. Changes in United’s balance sheet composition and interest rate risk position made the hedges no longer necessary as protection against rising interest rates. The loss remaining in other comprehensive income on the de-designated swaps is being amortized into earnings over the original term of the swaps as the forecasted transactions that the swaps were originally designated to hedge are still expected to occur.
	The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings.  Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense when the swaps become effective, as interest payments are made on United’s LIBOR based, variable-rate wholesale borrowings and indexed deposit accounts.  United recognized $7,000 and $35,000, respectively, in hedge ineffectiveness gains in interest expense on active cash flow hedges during the first three months of 2015 and 2014.  United expects that $1.83 million will be reclassified as an increase to deposit interest expense over the next twelve months related to these cash flow hedges.
	Fair Value Hedges of Interest Rate Risk
	United is exposed to changes in the fair value of certain of its fixed rate obligations due to changes in interest rates.  United uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in interest rates. Interest rate swaps designated as fair value hedges of brokered deposits involve the receipt of fixed-rate amounts from a counterparty in exchange for United making variable rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate swaps designated as fair value hedges of fixed rate investments involve the receipt of variable-rate payments from a counterparty in exchange for United making fixed rate payments over the life of the instrument without the exchange of the underlying notional amount.  At March 31, 2015, United had 16 interest rate swaps with an aggregate notional amount of $197 million that were designated as fair value hedges of interest rate risk and were pay-variable / receive-fixed swaps hedging the changes in the fair value of fixed rate brokered time deposits resulting from changes in interest rates.  Also at March 31, 2015, United had one interest rate swap with a notional of $30 million that was designated as a pay-fixed / receive variable fair value hedge of changes in the fair value of a fixed rate corporate bond.  At March 31, 2014, United had 24 interest rate swaps with an aggregate notional amount of $285 million that were designated as fair value hedges of interest rate risk.  Eight of the interest rate swaps outstanding at March 31, 2014 with an aggregate notional amount of $86 million were receive-variable / pay-fixed swaps that were used for the purpose of hedging changes in the fair value of corporate bonds resulting from changes in interest rates.  The other 16 were pay-variable / receive-fixed swaps hedging the changes in the fair value of fixed rate brokered time deposits resulting from changes in interest rates.
	For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in earnings.  United includes the gain or loss on the hedged items in the same income statement line item as the offsetting loss or gain on the related derivatives.  During the three months ended March 31, 2015, United recognized a net loss of $37,000 related to ineffectiveness in the fair value hedging relationships.  During the three months ended March 31, 2014, United recognized net losses of $389,000 related to ineffectiveness of the fair value hedging relationships.  United also recognized a net reduction of interest expense of $1.14 million and $1.21 million, respectively, for the three months ended March 31, 2015 and 2014 related to United’s fair value hedges of brokered time deposits, which includes net settlements on the derivatives.  United recognized reductions of $74,000 and $530,000, respectively, of interest revenue on securities during the first three months of 2015 and 2014 related to United’s fair value hedges of corporate bonds.
	Tabular Disclosure of the Effect of Derivative Instruments on the Income Statement
	The tables below present the effect of United’s derivative financial instruments on the consolidated statement of operations for the three months ended March 31, 2015 and 2014.
	Derivatives in Fair Value Hedging Relationships (in thousands).
		Location of Gain		Amount of Gain (Loss)							Amount of Gain (Loss)
		(Loss) Recognized		Recognized in Income							Recognized in Income
		in Income on		on Derivative							on Hedged Item
		Derivative		2015				2014			2015			2014
	Three Months Ended March 31,
	Fair value hedges of brokered CD’s	Interest expense		$	2,370			$	5,853		$	(2,405	)	$	(6,034	)
	Fair value hedges of corporate bonds	Interest revenue			(345	)			(1,704	)		343			1,496
				$	2,025			$	4,149		$	(2,062	)	$	(4,538	)
	In certain cases, the estate of deceased brokered certificate of deposit holders may put the certificate of deposit back to the issuing bank at par upon the death of the holder.  When these estate puts occur, a gain or loss is recognized for the difference between the fair value and the par amount of the deposits put back.  The change in the fair value of brokered time deposits that are being hedged in fair value hedging relationships reported in the table above includes gains and losses from estate puts and such gains and losses are included in the amount of reported ineffectiveness gains or losses.
	Derivatives in Cash Flow Hedging Relationships (in thousands).
			Amount of Gain (Loss)							Gain (Loss) Reclassified from Accumulated							Gain (Loss) Recognized in Income on
			Recognized in Other							Other Comprehensive Income into Income							Derivative (Ineffective Portion)
			Comprehensive Income							(Effective Portion)
			on Derivative (Effective
			Portion)
			2015				2014			Location		2015			2014		Location		2015			2014
	Three Months Ended March 31,
	Interest rate swaps		$	(471	) $			(2,833	)	Interest Expense	$	(425	)	$	(97	)	Interest expense	$	(7	)	$	(35	)
	Credit-Risk-Related Contingent Features
	United manages its credit exposure on derivatives transactions by entering into a bilateral credit support agreement with each counterparty.  The credit support agreements require collateralization of exposures beyond specified minimum threshold amounts.  The details of these agreements, including the minimum thresholds, vary by counterparty.  As of March 31, 2015, collateral totaling $31.4 million was pledged toward derivatives in a liability position.
	United’s agreements with each of its derivative counterparties contain a provision where if either party defaults on any of its indebtedness, then it could also be declared in default on its derivative obligations.  The agreements with derivatives counterparties also include provisions that if not met, could result in United being declared in default.  United has agreements with certain of its derivative counterparties that contain a provision where if United fails to maintain its status as a well-capitalized institution or is subject to a prompt corrective action directive, the counterparty could terminate the derivative positions and United would be required to settle its obligations under the agreements.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]
Stock-Based Compensation	Note 11 – Stock-Based Compensation
	United has an equity compensation plan that allows for grants of incentive stock options, nonqualified stock options, restricted stock and restricted stock unit awards (also referred to as “nonvested stock” awards), stock awards, performance share awards or stock appreciation rights.  Options granted under the plan can have an exercise price no less than the fair market value of the underlying stock at the date of grant.  The general terms of the plan include a vesting period (usually four years) with an exercisable period not to exceed ten years.  Certain options, restricted stock and restricted stock unit awards provide for accelerated vesting if there is a change in control (as defined in the plan).  As of March 31, 2015, 405,000 additional awards could be granted under the plan. Through March 31, 2015, incentive stock options, nonqualified stock options, restricted stock and restricted stock unit awards, base salary stock grants and performance share awards have been granted under the plan.
	The following table shows stock option activity for the first three months of 2015.
							Weighted-
							Average		Aggregate
					Weighted-		Remaining		Intrinisic
					Average Exercise		Contractual		Value
	Options	Shares			Price		Term (Years)		$0
	Outstanding at December 31, 2014		313,555		$	93.4
	Expired		(12,211	)		103.12
	Outstanding at March 31, 2015		301,344			93.01		2.7	$	118
	Exercisable at March 31, 2015		285,095			97.43		2.3		63
	The fair value of each option is estimated on the date of grant using the Black-Scholes model.  No stock options were granted during the three months ended March 31, 2015 and 2014.
	Most of United’s outstanding stock options were granted prior to the economic downturn during which time United’s stock price decreased sharply.  The lower stock price has rendered most of United’s outstanding options severely out of the money and potentially worthless to the grantee.  Therefore, historical exercise patterns do not provide a reasonable basis for determining the expected life of new option grants.  United therefore uses the formula provided by the SEC in Staff Accounting Bulletin No. 107 to determine the expected life of options.
	United recognized $10,000 in compensation expense related to stock options during the three months ended March 31, 2015.  United recognized no compensation expense relating to stock options for the three months ended March 31, 2014.  The amount of compensation expense was determined based on the fair value of the options at the time of grant, multiplied by the number of options granted that were expected to vest, which was then amortized over the vesting period.  The forfeiture rate for new options issued is estimated to be approximately 3% per year.  No options were exercised during the first three months of 2015 or 2014.
	The table below presents restricted stock units activity for the first three months of 2015.
	Restricted Stock Unit Awards	Shares			Weighted-
					Average Grant-
					Date Fair Value
	Outstanding at December 31, 2014		829,201		$	14.76
	Granted		95,167			18.06
	Vested		(100,607	)		15.36
	Cancelled		(50,457	)		15.09
	Outstanding at March 31, 2015		773,304			15.07
	Vested at March 31, 2015		7,580			9.9
	Compensation expense for restricted stock units is based on the fair value of restricted stock unit awards at the time of grant, which is equal to the value of United’s common stock on the date of grant.  The value of restricted stock unit awards that are expected to vest is amortized into expense over the vesting period.  For the three months ended March 31, 2015 and 2014, compensation expense of $956,000 and $1.10 million, respectively, was recognized related to restricted stock unit awards.  In addition, for each of the three months ended March 31, 2015 and 2014 $25,000 was recognized in other operating expense for restricted stock unit awards granted to members of United’s board of directors.  The total intrinsic value of outstanding restricted stock unit awards was $14.6 million at March 31, 2015.
	As of March 31, 2015, there was $9.46 million of unrecognized compensation cost related to non-vested stock options and restricted stock unit awards granted under the plan.  That cost is expected to be recognized over a weighted-average period of 2.69 years.  The aggregate grant date fair value of options and restricted stock unit awards that vested during the three months ended March 31, 2015, was $1.55 million.

Common_and_Preferred_Stock_Iss

Common and Preferred Stock Issued / Common Stock Issuable	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Common and Preferred Stock Issued / Common Stock Issuable	Note 12 – Common and Preferred Stock Issued / Common Stock Issuable
	United sponsors a Dividend Reinvestment and Share Purchase Plan (“DRIP”) that allows participants who already own United’s common stock to purchase additional shares directly from United.  The DRIP also allows participants to automatically reinvest their quarterly dividends in additional shares of common stock without a commission.  No shares were issued through the DRIP in the first three months of 2014 as the DRIP was suspended during that time.  The DRIP was re-activated following United’s reinstatement of its quarterly dividend in the second quarter of 2014.  In the first quarter of 2015, 487 shares were issued through the DRIP.
	United’s 401(k) Plan has routinely purchased shares of United’s common stock directly from United.  Effective January 1, 2015, the 401(k) Plan discontinued offering shares of United’s common stock as an investment option.  During the three months ended March 31, 2014, United’s 401(k) Plan purchased 11,837 shares directly from United at the average of the high and low stock prices on the transaction dates which increased capital by $209,000.
	In addition, United has an Employee Stock Purchase Program (“ESPP”) that allows eligible employees to purchase shares of common stock at a 5% discount, with no commission charges.  Effective January 1, 2015, the discount was increased to 10% on purchases made through the ESPP.  During the first three months of 2015 and 2014, United issued 3,202 shares and 2,639 shares, respectively through the ESPP.
	United offers its common stock as an investment option in its deferred compensation plan.  United also allows for the deferral of restricted stock unit awards.  The common stock component of the deferred compensation plan is accounted for as an equity instrument and is reflected in the consolidated financial statements as common stock issuable.  The deferred compensation plan does not allow for diversification once an election is made to invest in United’s common stock and settlement must be accomplished in shares at the time the deferral period is completed. At March 31, 2015 and 2014, 400,369 and 237,763 shares of common stock, respectively, were issuable under the deferred compensation plan.
	In the first quarter of 2014, United redeemed all of its outstanding preferred stock.  The preferred stock was redeemed at par and did not result in any gain or loss.  The redemptions were funded from a combination of dividends from United Community Bank, borrowings on United’s holding company line of credit and cash on hand.
	Pursuant to its settlement agreement with Fletcher, United agreed to deliver 640,000 shares of its common stock and cash that, together with the common stock, would have a combined fair value of $12 million.  On March 25, 2014, to satisfy its obligations under the settlement agreement, United completed the sale of 640,000 shares of common stock and received approximately $12.2 million in net proceeds after discounts and expenses, $12.0 million of which was paid to Fletcher in November 2014.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 13 – Income Taxes
	The income tax provision for the three months ended March 31, 2015 and 2014 was $10.4 million and $9.04 million, respectively, which represents effective tax rates of 37.0% for each period.  At March 31, 2015, December 31, 2014 and March 31, 2014, United maintained a valuation allowance on its net deferred tax asset of $4.27 million, $4.12 million and $4.08 million, respectively.  Management assesses the valuation allowance recorded against its net deferred tax asset at each reporting period.  The determination of whether a valuation allowance for its net deferred tax asset is appropriate is subject to considerable judgment and requires an evaluation of all the positive and negative evidence.
	United evaluated the need for a valuation allowance at March 31, 2015.  Based on the assessment of all the positive and negative evidence, management concluded that it is more likely than not that nearly all of its net deferred tax asset will be realized based upon future taxable income.  The remaining valuation allowance of $4.27 million is related to specific state income tax credits that have short carryforward periods and are expected to expire unused.
	The valuation allowance could fluctuate in future periods based on the assessment of the positive and negative evidence.  Management’s conclusion at March 31, 2015 that it was more likely than not that United’s net deferred tax asset of $202 million will be realized is based upon management’s estimate of future taxable income.  Management’s estimate of future taxable income is based on internal forecasts that consider historical performance, various internal estimates and assumptions, as well as certain external data all of which management believes to be reasonable although inherently subject to significant judgment.  If actual results differ significantly from the current estimates of future taxable income, even if caused by adverse macro-economic conditions, the valuation allowance may need to be increased for some or all of its net deferred tax asset.  Such an increase to the net deferred tax asset valuation allowance could have a material adverse effect on United’s financial condition and results of operations.
	United is subject to income taxation in the United States and various state jurisdictions.  United’s federal and state income tax returns are filed on a consolidated basis.  Currently, no years for which United filed a federal income tax return are under examination by the IRS, and there are no state tax examinations currently in progress.  United is no longer subject to income tax examinations from state and local income tax authorities for years before 2011.  Although United is unable to determine the ultimate outcome of future examinations, United believes that the liability recorded for uncertain tax positions is appropriate.
	At March 31, 2015, December 31, 2014 and March 31, 2014, unrecognized income tax benefits totaled $4.29 million, $4.20 million and $4.59 million, respectively.

Assets_and_Liabilities_Measure

Assets and Liabilities Measured at Fair Value	3 Months Ended
	Mar. 31, 2015
Fair Value [Abstract]
Assets and Liabilities Measured at Fair Value	Note 14 – Assets and Liabilities Measured at Fair Value
	Fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability.  As a basis for considering market participant assumptions in fair value measurements, United uses a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).  United has processes in place to review the significant valuation inputs and to reassess how the instruments are classified in the valuation framework.
	Fair Value Hierarchy
	Level 1     Valuation is based upon quoted prices (unadjusted) in active markets for identical assets or liabilities that United has the ability to access.
	Level 2     Valuation is based upon quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals.
	Level 3     Valuation is generated from model-based techniques that use at least one significant assumption based on unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. United’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	The following is a description of the valuation methodologies used for assets and liabilities recorded at fair value.
	Securities Available-for-Sale
	Investment securities available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions.  Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds.  Level 2 securities include mortgage-backed securities issued by government sponsored entities, municipal bonds, corporate debt securities and asset-backed securities and are valued based on observable inputs that include: quoted market prices for similar assets, quoted market prices that are not in an active market, or other inputs that are observable in the market and can be corroborated by observable market data for substantially the full term of the securities.  Securities classified as Level 3 include asset-backed securities in less liquid markets.  Securities classified as Level 3 are valued based on estimates obtained from broker-dealers and are not directly observable.
	Deferred Compensation Plan Assets and Liabilities
	Included in other assets in the Consolidated Balance Sheet are assets related to employee deferred compensation plans. The assets associated with these plans are invested in mutual funds and classified as Level 1. Deferred compensation liabilities, also classified as Level 1, are carried at the fair value of the obligation to the employee, which mirrors the fair value of the invested assets and is included in other liabilities in the consolidated balance sheet.
	Mortgage Loans Held for Sale
	Mortgage loans held for sale are carried at the lower of cost or fair value. The fair value of mortgage loans held for sale is based on what secondary markets are currently offering for mortgage loans with similar characteristics.
	Loans
	United does not record loans at fair value on a recurring basis. However, from time to time, a loan is considered impaired and an allowance for loan losses is established.  Loans for which it is probable that payment of interest and principal will not be made in accordance with the contractual terms of the loan agreement are considered impaired. Once a loan is identified as individually impaired, management measures impairment based on the present value of expected future cash flows discounted at the loan’s effective interest rate, except that as a practical expedient, a creditor may measure impairment based on a loan’s observable market price, or the fair value of the collateral if repayment of the loan is dependent upon the sale of the underlying collateral.  Those impaired loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. In accordance with ASC 820, impaired loans where an allowance is established based on the fair value of collateral require classification in the fair value hierarchy. When the fair value of the collateral is based on an observable market price or a current appraised value, United records the impaired loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, United records the impaired loan as nonrecurring Level 3.
	Foreclosed Assets
	Foreclosed assets are adjusted to fair value, less cost to sell, upon transfer of the loans to foreclosed assets. Subsequently, foreclosed assets are carried at the lower of carrying value or fair value. Fair value is based upon independent market prices, appraised values of the collateral or management’s estimation of the value of the collateral. When the fair value of the collateral is based on an observable market price or a current appraised value, United records the foreclosed asset as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, United records the foreclosed asset as nonrecurring Level 3.
	Derivative Financial Instruments
	United uses interest rate swaps and interest rate floors to manage its interest rate risk.  The valuation of these instruments is typically determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities.  The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments.  The variable cash payments are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.
	The fair values of interest rate options are determined using the market standard methodology of discounting the future expected cash receipts that would occur if variable interest rates fell below the strike rate of the floors.  The variable interest rates used in the calculation of projected receipts on the floor are based on an expectation of future interest rates derived from observable market interest rate curves and volatilities.  To comply with the provisions of ASC 820, United incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements.  In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, United has considered the effect of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.
	Although management has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties.  However, as of March 31, 2015, management had assessed the significance of the effect of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives.  Additionally, in the review of the structured derivative inputs, it was determined that the broker quotes, used as a key valuation input, were not observable consistent with a level 2 disclosure.  This resulted in United transferring those derivatives to Level 3 in the ASC 820 leveling disclosures as of December 31, 2014.
	SBA Servicing Rights
	As United expanded its SBA lending and subsequent loan sales activities, a servicing asset has been recognized (per ASC 860).  This asset is recorded at fair value on recognition, and management has elected to carry this asset at fair value for subsequent reporting.  Given the nature of the asset, the key valuation inputs are unobservable and management classifies this asset as Level 3.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	The table below presents United’s assets and liabilities measured at fair value on a recurring basis as of March 31, 2015, December 31, 2014 and March 31, 2014, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands).
	31-Mar-15	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
	U.S. Treasuries	$	48,414		$	-		$	-			$	48,414
	U.S. Government agencies		-			37,268			-				37,268
	State and political subdivisions		-			16,352			-				16,352
	Mortgage-backed securities		-			1,041,114			-				1,041,114
	Corporate bonds		-			186,957			750				187,707
	Asset-backed securities		-			468,728			-				468,728
	Other		-			2,390			-				2,390
	Deferred compensation plan assets		3,366			-			-				3,366
	SBA servicing rights		-			-			2,717				2,717
	Derivative financial instruments		-			12,174			8,117				20,291
	Total assets	$	51,780		$	1,764,983		$	11,584			$	1,828,347
	Liabilities:
	Deferred compensation plan liability	$	3,366		$	-		$	-			$	3,366
	Derivative financial instruments		-			14,747			14,529				29,276
	Total liabilities	$	3,366		$	14,747		$	14,529			$	32,642
	31-Dec-14	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
	U.S. Treasuries	$	105,709		$	-		$	-			$	105,709
	U.S. Government agencies		-			36,299			-				36,299
	State and political subdivisions		-			20,233			-				20,233
	Mortgage-backed securities		-			996,820			-				996,820
	Corporate bonds		-			164,878			750				165,628
	Asset-backed securities		-			455,928			-				455,928
	Other		-			2,117			-				2,117
	Deferred compensation plan assets		3,864			-			-				3,864
	SBA servicing rights					-			2,551				2,551
	Derivative financial instruments		-			8,337			12,262				20,599
	Total assets	$	109,573		$	1,684,612		$	15,563			$	1,809,748
	Liabilities:
	Deferred compensation plan liability	$	3,864		$	-		$	-			$	3,864
	Derivative financial instruments		-			13,018			18,979				31,997
	Total liabilities	$	3,864		$	13,018		$	18,979			$	35,861
	31-Mar-14	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
State and political subdivisions	$	-		$	23,006		$	-			$	23,006
Mortgage-backed securities		-			1,128,112			-				1,128,112
Corporate bonds		-			251,574			350				251,924
Asset-backed securities		-			432,062			-				432,062
Other		-			2,572			-				2,572
Deferred compensation plan assets		3,468			-			-				3,468
Derivative financial instruments		-			21,563			-				21,563
Total assets	$	3,468		$	1,858,889		$	350			$	1,862,707
Liabilities:
Deferred compensation plan liability	$	3,468		$	-		$	-			$	3,468
Brokered certificates of deposit		-			177,726			-				177,726
Derivative financial instruments		-			42,309			-				42,309
Total liabilities	$	3,468		$	220,035		$	-			$	223,503
The following table shows a reconciliation of the beginning and ending balances for assets measured at fair value on a recurring basis using significant unobservable inputs that are classified as Level 3 values (in thousands).
	Three Months Ended March 31
	2015													2014
	Derivative			Derivative			SBA				Securities			Securities
	Asset			Liability			servicing				Available-for-			Available-for-
							rights				Sale			Sale
Balance at beginning of period	$	12,262		$	18,979		$	2,551			$	750		$	350
Purchases		-			-			-				-			-
Additions		-			-			190				-			-
Sales and settlements		-			-			-				-			-
Other comprehensive income		-			-			-				-			-
Amounts included in earnings - fair value adjustments		(4,145	)		(4,450	)		(24	)			-			-
Transfers between valuation levels, net		-			-			-				-			-
Balance at end of period	$	8,117		$	14,529		$	2,717			$	750		$	350
The following table presents quantitative information about Level 3 fair value measurements for fair value on a recurring basis at March 31, 2015, December 31, 2014 and March 31, 2014 (in thousands).
	Fair Value												Weighted Average
	March 31,			December 31,			March 31,			Valuation			March 31,			December 31,
Level 3 Assets	2015			2014			2014			Technique		Unobservable  Inputs	2015			2014
SBA Servicing Rights	$	2,717		$	2,551		$	-		Discounted		Discount rate		11.1	%		12	%
										cash flow		Prepayment Rate		7.26	%		6.7	%
Corporate Bonds		750			750			350		Indicative bid provided by a broker		Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company		N/A			N/A
Derivatives assets		8,117			12,262			-		Dealer Priced		Dealer Priced		N/A			N/A
Derivative liabilities		14,529			18,979			-		Dealer Priced		Dealer Priced		N/A			N/A
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
United may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis.  These include assets that are measured at the lower of cost or market that were recognized at fair value below cost at the end of the period.  The table below presents United’s assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2015, December 31, 2014 and March 31, 2015, aggregated by the level in the fair value hierarchy within which those measurements fall (in thousands).
31-Mar-15	Level 1			Level 2			Level 3				Total
Assets
Loans	$	-		$	-		$	80,432			$	80,432
Foreclosed properties		-			-			1,021				1,021
Total	$	-		$	-		$	81,453			$	81,453
31-Dec-14
Assets
Loans	$	-		$	-		$	83,541			$	83,541
Foreclosed properties		-			-			1,555				1,555
Total	$	-		$	-		$	85,096			$	85,096
31-Mar-14
Assets
Loans	$	-		$	-		$	79,918			$	79,918
Foreclosed properties		-			-			3,120				3,120
Total	$	-		$	-		$	83,038			$	83,038
Loans that are reported above as being measured at fair value on a non-recurring basis are generally impaired loans that have either been partially charged off or have specific reserves assigned to them.  Nonaccrual impaired loans that are collateral dependent are generally written down to 80% of appraised value which considers the estimated costs to sell.  Specific reserves are established for impaired loans based on appraised value of collateral or discounted cash flows.  Foreclosed properties that are included above as measured at fair value on a nonrecurring basis are those properties that resulted from a loan that had been charged down or have been written down subsequent to foreclosure.  Foreclosed properties are generally recorded at the lower of 80% of appraised value or 90% of the asking price which considers the estimated cost to sell.
Assets and Liabilities Not Measured at Fair Value
For financial instruments that have quoted market prices, those quotes are used to determine fair value.  Financial instruments that have no defined maturity, have a remaining maturity of 180 days or less, or reprice frequently to a market rate, are assumed to have a fair value that approximates reported book value, after taking into consideration any applicable credit risk.  If no market quotes are available, financial instruments are valued by discounting the expected cash flows using an estimated current market interest rate for the financial instrument.  For off-balance sheet derivative instruments, fair value is estimated as the amount that United would receive or pay to terminate the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts.
United’s cash and cash equivalents and repurchase agreements have short maturities and therefore the carrying value approximates fair value.  The fair value of securities available-for-sale equals the balance sheet value.  Due to the short-term settlement of accrued interest receivable and payable, the carrying amount closely approximates fair value.
Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect the premium or discount on any particular financial instrument that could result from the sale of United’s entire holdings. Because no ready market exists for a significant portion of United’s financial instruments, fair value estimates are based on many judgments. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.
Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include the mortgage banking operation, brokerage network, deferred income taxes, premises and equipment and goodwill. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.
Off-balance sheet instruments (commitments to extend credit and standby letters of credit) are generally short-term and at variable rates.  Therefore, both the carrying amount and the estimated fair value associated with these instruments are immaterial.
The carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis in United’s balance sheet at March 31, 2015, December 31, 2014, and March 31, 2014 are as follows (in thousands).
	Carrying			Fair Value Level
31-Mar-15	Amount			Level 1			Level 2				Level 3			Total
Assets:
Securities held to maturity	$	399,228		$	-		$	413,550			$	-		$	413,550
Loans, net		4,717,682			-			-				4,686,611			4,686,611
Mortgage loans held for sale		15,723			-			16,181				-			16,181
Liabilities:
Deposits		6,437,931			-			6,438,984				-			6,438,984
Federal Home Loan Bank advances		270,125			-			270,124				-			270,124
Long-term debt		113,901			-			-				116,919			116,919
31-Dec-14
Assets:
Securities held to maturity		415,267			-			425,233				-			425,233
Loans, net		4,600,500			-			-				4,549,027			4,549,027
Mortgage loans held for sale		13,737			-			14,139				-			14,139
Liabilities:
Deposits		6,326,513			-			6,328,264				-			6,328,264
Federal Home Loan Bank advances		270,125			-			270,125				-			270,125
Long-term debt		129,865			-			-				132,814			132,814
31-Mar-14
Assets:
Securities held to maturity		464,697			-			473,136				-			473,136
Loans, net		4,280,485			-			-				4,201,255			4,201,255
Mortgage loans held for sale		10,933			-			11,121				-			11,121
Liabilities:
Deposits		6,247,541			-			6,238,927				-			6,238,927
Federal Home Loan Bank advances		50,125			-			50,125				-			50,125
Long-term debt		129,865			-			-				130,636			130,636

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 15 – Commitments and Contingencies
	United is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and letters of credit. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the balance sheet. The contract amounts of these instruments reflect the extent of involvement United has in particular classes of financial instruments.  The exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and letters of credit written is represented by the contractual amount of these instruments. United uses the same credit policies in making commitments and conditional obligations as it uses for underwriting on-balance sheet instruments. In most cases, collateral or other security is required to support financial instruments with credit risk.
	The following table summarizes, as of March 31, 2015, December 31, 2014 and March 31, 2014, the contractual amount of off-balance sheet instruments (in thousands).
		31-Mar-15		31-Dec-14		31-Mar-14
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit	$	972,819	$	878,160	$	720,891
	Letters of credit		24,310		19,861		19,960
	United, in the normal course of business, is subject to various pending and threatened lawsuits in which claims for monetary damages are asserted.  Although it is not possible to predict the outcome of these lawsuits, or the range of any possible loss, management, after consultation with legal counsel, does not anticipate that the ultimate aggregate liability, if any, arising from these lawsuits will have a material adverse effect on United’s financial position or results of operations.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 16 – Subsequent Events
	On April 22, 2015, United announced that it had reached a definitive agreement to acquire Palmetto Bancshares, Inc. (“Palmetto”) and its wholly owned bank subsidiary The Palmetto Bank.  The Palmetto Bank is the third largest banking institution headquartered in South Carolina with total assets of $1.2 billion, loans of $832 million and deposits of $967 million.  It is a 108-year old community bank that serves Upstate South Carolina through 25 branch locations in nine counties along the Interstate 85 corridor.  The Palmetto Bank will merge into and operate under the brand of United Community Bank.
	Under the terms of the agreement, which has been unanimously approved by the Boards of Directors of both companies, Palmetto shareholders will have the right to receive $19.25 in cash or 0.97 shares of United common stock, or any combination thereof, for each share of Palmetto common stock. The cash and stock elections are subject to proration to ensure that 30% of the outstanding shares of Palmetto common stock will be exchanged for cash and 70% of the outstanding shares of Palmetto common stock will be exchanged for shares of United common stock in the merger. Based on United’s ten-day average closing price of $18.78 per share as of April 21, 2015 the aggregate deal value is approximately $240.5 million.
	The merger, which is subject to regulatory approval, the approval of the shareholders of Palmetto, and other customary conditions, is expected to close in the fourth quarter of 2015.
	On May 1, 2015, United completed its previously announced acquisition of MoneyTree Corporation and its wholly owned bank subsidiary, First National Bank.

Balance_Sheet_Offsetting_Table

Balance Sheet Offsetting (Tables)	3 Months Ended
	Mar. 31, 2015
Offsetting [Abstract]
Schedule of summary of amounts outstanding under reverse repurchase agreements and derivative financial instruments		Gross			Gross			Net Asset
		Amounts of Recognized			Amounts			Balance		Gross Amounts not Offset
		Assets			Offset on the					in the Balance Sheet
					Balance
	31-Mar-15				Sheet					Financial Instruments			Collateral			Net Amount
													Received
	Repurchase agreements / reverse repurchase agreements	$	345,000		$	(325,000	)	$	20,000	$	-		$	(21,048	)	$	-
	Derivatives		20,291			-			20,291		(597	)		(4,435	)		15,259
	Total	$	365,291		$	(325,000	)	$	40,291	$	(597	)	$	(25,483	)	$	15,259
	Weighted average interest rate of reverse repurchase agreements		1.18	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	325,000		$	(325,000	)	$	-	$	-		$	-		$	-
	Derivatives		29,276			-			29,276		(597	)		(31,407	)		-
	Total	$	354,276		$	(325,000	)	$	29,276	$	(597	)	$	(31,407	)	$	-
	Weighted average interest rate of repurchase agreements		0.3	%
		Gross			Gross			Net Asset
		Amounts of			Amounts			Balance		Gross Amounts not Offset
		Recognized			Offset on the					in the Balance Sheet
		Assets			Balance
	31-Dec-14				Sheet					Financial			Collateral			Net Amount
										Instruments			Received
	Repurchase agreements / reverse repurchase agreements	$	395,000		$	(375,000	)	$	20,000	$	-		$	(20,302	)	$	-
	Derivatives		20,599			-			20,599		(869	)		(3,716	)		16,014
	Total	$	415,599		$	(375,000	)	$	40,599	$	(869	)	$	(24,018	)	$	16,014
	Weighted average interest rate of reverse repurchase agreements		1.16	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	375,000		$	(375,000	)	$	-	$	-		$	-		$	-
	Derivatives		31,997			-			31,997		(869	)		(32,792	)		-
	Total	$	406,997		$	(375,000	)	$	31,997	$	(869	)	$	(32,792	)	$	-
	Weighted average interest rate of repurchase agreements		0.29	%
		Gross			Gross			Net Asset
		Amounts of			Amounts			Balance		Gross Amounts not Offset
		Recognized			Offset on the					in the Balance Sheet
		Assets			Balance
	31-Mar-14				Sheet					Financial			Collateral			Net Amount
										Instruments			Received
	Repurchase agreements / reverse repurchase agreements	$	397,000		$	(350,000	)	$	47,000	$	-		$	(51,243	)	$	-
	Derivatives		21,563			-			21,563		(3,896	)		(704	)		16,963
	Total	$	418,563		$	(350,000	)	$	68,563	$	(3,896	)	$	(51,947	)	$	16,963
	Weighted average interest rate of reverse repurchase agreements		1.09	%
		Gross			Gross			Net
		Amounts of			Amounts			Liability		Gross Amounts not Offset
		Recognized			Offset on the			Balance		in the Balance Sheet
		Liabilities			Balance
					Sheet					Financial			Collateral			Net Amount
										Instruments			Pledged
	Repurchase agreements / reverse repurchase agreements	$	350,000		$	(350,000	)	$	-	$	-		$	-		$	-
	Derivatives		42,309			-			42,309		(3,896	)		(35,754	)		2,659
	Total	$	392,309		$	(350,000	)	$	42,309	$	(3,896	)	$	(35,754	)	$	2,659
	Weighted average interest rate of repurchase agreements		0.28	%

Securities_Tables

Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investment Securities [Abstract]
Schedule of cost basis, gross unrealized gains and losses and fair value of securities held to maturity				Gross			Gross
		Amortized		Unrealized			Unrealized		Fair
	As of March 31, 2015	Cost		Gains			Losses		Value
	State and political subdivisions	$	48,136	$	4,029		$	-	$	52,165
	Mortgage-backed securities (1)		351,092		10,470			177		361,385
	Total	$	399,228	$	14,499		$	177	$	413,550
	As of December 31, 2014
	State and political subdivisions	$	48,157	$	3,504		$	-	$	51,661
	Mortgage-backed securities (1)		367,110		7,716			1,254		373,572
	Total	$	415,267	$	11,220		$	1,254	$	425,233
	As of March 31, 2014
	State and political subdivisions	$	51,257	$	3,430		$	13	$	54,674
	Mortgage-backed securities (1)		413,440		6,877			1,855		418,462
	Total	$	464,697	$	10,307		$	1,868	$	473,136
	(1) All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.
Schedule of held to maturity securities in an unrealized loss position		Less than 12 Months					12 Months or More				Total
	As of March 31, 2015	Fair Value		Unrealized			Fair Value		Unrealized		Fair Value		Unrealized
				Loss					Loss				Loss
	Mortgage-backed securities	$	16,177	$	140		$	6,252	$	37	$	22,429	$	177
	Total unrealized loss position	$	16,177	$	140		$	6,252	$	37	$	22,429	$	177
	As of December 31, 2014
	Mortgage-backed securities	$	126,514	$	917		$	17,053	$	337	$	143,567	$	1,254
	Total unrealized loss position	$	126,514	$	917		$	17,053	$	337	$	143,567	$	1,254
	As of March 31, 2014
	State and political subdivisions	$	1,628	$	13		$	-	$	-	$	1,628	$	13
	Mortgage-backed securities		200,284		1,721			1,644		134		201,928		1,855
	Total unrealized loss position	$	201,912	$	1,734		$	1,644	$	134	$	203,556	$	1,868
Schedule of cost basis, unrealized gains and losses, and fair value of securities available for sale				Gross			Gross
		Amortized		Unrealized			Unrealized		Fair
	As of March 31, 2015	Cost		Gains			Losses		Value
	U.S. Treasuries	$	47,661	$	753		$	-	$	48,414
	U.S. Government agencies		36,508		760			-		37,268
	State and political subdivisions		15,864		491			3		16,352
	Mortgage-backed securities (1)		1,023,809		20,986			3,681		1,041,114
	Corporate bonds		186,126		2,107			526		187,707
	Asset-backed securities		466,663		2,812			747		468,728
	Other		2,390		-			-		2,390
	Total	$	1,779,021	$	27,909		$	4,957	$	1,801,973
	As of December 31, 2014
	U.S. Treasuries	$	105,540	$	235		$	66	$	105,709
	U.S. Government agencies		36,474		-			175		36,299
	State and political subdivisions		19,748		504			19		20,233
	Mortgage-backed securities (1)		988,012		16,273			7,465		996,820
	Corporate bonds		165,018		1,686			1,076		165,628
	Asset-backed securities		455,626		2,257			1,955		455,928
	Other		2,117		-			-		2,117
	Total	$	1,772,535	$	20,955		$	10,756	$	1,782,734
	As of March 31, 2014
	State and political subdivisions	$	22,244	$	842		$	80	$	23,006
	Mortgage-backed securities (1)		1,126,227		13,213			11,328		1,128,112
	Corporate bonds		255,238		1,616			4,930		251,924
	Asset-backed securities		429,492		3,003			433		432,062
	Other		2,572		-			-		2,572
	Total	$	1,835,773	$	18,674		$	16,771	$	1,837,676
	(1) All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.
Schedule of available for sale securities in an unrealized loss position		Less than 12 Months					12 Months or More				Total
	As of March 31, 2015	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	State and political subdivisions	$	2,957	$	3		$	-	$	-	$	2,957	$	3
	Mortgage-backed securities		51,339		363			219,027		3,318		270,366		3,681
	Corporate bonds		10,474		526			-		-		10,474		526
	Asset-backed securities		137,476		564			30,229		183		167,705		747
	Total unrealized loss position	$	202,246	$	1,456		$	249,256	$	3,501	$	451,502	$	4,957
	As of December 31, 2014
	U.S. Treasuries	$	34,180	$	66		$	-	$	-	$	34,180	$	66
	U.S. Government agencies		36,299		175			-		-		36,299		175
	State and political subdivisions		2,481		19			-		-		2,481		19
	Mortgage-backed securities		88,741		446			251,977		7,019		340,718		7,465
	Corporate bonds		37,891		371			20,275		705		58,166		1,076
	Asset-backed securities		221,359		1,592			40,952		363		262,311		1,955
	Total unrealized loss position	$	420,951	$	2,669		$	313,204	$	8,087	$	734,155	$	10,756
	As of March 31, 2014
	State and political subdivisions	$	3,595	$	80		$	-	$	-	$	3,595	$	80
	Mortgage-backed securities		342,886		3,817			186,290		7,511		529,176		11,328
	Corporate bonds		82,337		2,393			75,320		2,537		157,657		4,930
	Asset-backed securities		136,076		433			-		-		136,076		433
	Total unrealized loss position	$	564,894	$	6,723		$	261,610	$	10,048	$	826,504	$	16,771
Schedule of summary of securities sales activities		Three Months Ended
		March 31,
		2015		2014
	Proceeds from sales	$	69,467	$	153,316
	Gross gains on sales	$	1,539	$	410
	Gross losses on sales		-		(193	)
	Net gains on sales of securities	$	1,539	$	217
	Income tax expense attributable to sales	$	598	$	92
Schedule of amortized cost and fair value of available for sale and held to maturity securities by contractual maturity		Available-for-Sale					Held-to-Maturity
		Amortized Cost		Fair Value			Amortized Cost		Fair Value
	US Treasuries:
	1 to 5 years	$	47,661	$	48,414		$	-	$	-
			47,661		48,414			-		-
	US Government agencies:
	5 to 10 years		36,508		37,268			-		-
			36,508		37,268			-		-
	State and political subdivisions:
	Within 1 year		5,368		5,442			1,000		1,007
	1 to 5 years		7,550		7,821			18,689		20,005
	5 to 10 years		2,098		2,201			19,641		21,371
	More than 10 years		848		888			8,806		9,782
			15,864		16,352			48,136		52,165
	Corporate bonds:
	1 to 5 years		37,870		38,009			-		-
	5 to 10 years		115,749		117,333			-		-
	More than 10 years		32,507		32,365			-		-
			186,126		187,707			-		-
	Asset-backed securities:
	1 to 5 years		247,650		249,360			-		-
	5 to 10 years		58,575		59,053			-		-
	More than 10 years		160,438		160,315			-		-
			466,663		468,728			-		-
	Other:
	Within 1 year		442		442			-		-
	More than 10 years		1,948		1,948			-		-
			2,390		2,390			-		-
	Total securities other than mortgage-backed securities:
	Within 1 year		5,810		5,884			1,000		1,007
	1 to 5 years		340,731		343,604			18,689		20,005
	5 to 10 years		212,930		215,855			19,641		21,371
	More than 10 years		195,741		195,516			8,806		9,782
	Mortgage-backed securities		1,023,809		1,041,114			351,092		361,385
		$	1,779,021	$	1,801,973		$	399,228	$	413,550

Loans_and_Allowance_for_Loan_L1

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Loans and Allowance For Loan Losses [Abstract]
Schedule of major classifications of loans		March 31,				December 31,				March 31,
		2015				2014				2014
	Owner occupied commercial real estate	$	1,166,916			$	1,163,480			$	1,141,791
	Income producing commercial real estate		636,107				598,537				623,830
	Commercial & industrial		716,281				710,256				495,178
	Commercial construction		229,920				196,030				148,454
	Total commercial		2,749,224				2,668,303				2,409,253
	Residential mortgage		863,311				865,789				866,615
	Home equity lines of credit		465,474				465,872				446,705
	Residential construction		291,259				298,627				317,749
	Consumer installment		102,585				104,899				106,991
	Indirect auto		315,836				268,629				208,395
	Total loans		4,787,689				4,672,119				4,355,708
	Less allowance for loan losses		(70,007	)			(71,619	)			(75,223	)
	Loans, net	$	4,717,682			$	4,600,500			$	4,280,485
Schedule of balance and activity in the allowance for credit losses by portfolio segment	Three Months Ended March 31, 2015	Beginning Balance				Charge-				Recoveries			Allocation				Provision			Ending
						Offs							of							Balance
													Unallocated
	Owner occupied commercial real estate	$	16,041			$	(368	)		$	11		$	-			$	(732	)	$	14,952
	Income producing commercial real estate		10,296				(248	)			7			-				(400	)		9,655
	Commercial & industrial		3,255				(469	)			128			-				528			3,442
	Commercial construction		4,747				(22	)			-			-				610			5,335
	Residential mortgage		20,311				(578	)			162			-				243			20,138
	Home equity lines of credit		4,574				(73	)			14			-				(194	)		4,321
	Residential construction		10,603				(1,140	)			79			-				668			10,210
	Consumer installment		731				(326	)			376			-				(68	)		713
	Indirect auto		1,061				(128	)			13			-				295			1,241
	Total allowance for loan losses		71,619				(3,352	)			790			-				950			70,007
	Allowance for unfunded commitments		1,930				-				-			-				850			2,780
	Total allowance for credit losses	$	73,549			$	(3,352	)		$	790		$	-			$	1,800		$	72,787
	Three Months Ended March 31, 2014	Beginning				Charge-				Recoveries			Allocation				Provision			Ending
		Balance				Offs							of							Balance
													Unallocated
	Owner occupied commercial real estate	$	17,164			$	(341	)		$	89		$	1,278			$	5,166		$	23,356
	Income producing commercial real estate		7,174				(231	)			-			688				231			7,862
	Commercial & industrial		6,527				(963	)			541			318				(2,176	)		4,247
	Commercial construction		3,669				-				-			388				(80	)		3,977
	Residential mortgage		15,446				(1,581	)			66			1,452				584			15,967
	Home equity lines of credit		5,528				(1,003	)			10			391				1,194			6,120
	Residential construction		12,532				(304	)			93			1,728				(1,868	)		12,181
	Consumer installment		1,353				(676	)			327			-				(287	)		717
	Indirect auto		1,126				(77	)			11			-				(264	)		796
	Unallocated		6,243				-				-			(6,243	)			-			-
	Total allowance for loan losses		76,762				(5,176	)			1,137			-				2,500			75,223
	Allowance for unfunded commitments		2,165				-				-			-				-			2,165
	Total allowance for credit losses	$	78,927			$	(5,176	)		$	1,137		$	-			$	2,500		$	77,388
		31-Mar-15											31-Dec-14									31-Mar-14
	Allowance for Loan Losses	Individually				Collectively				Ending			Individually				Collectively			Ending		Individually		Collectively		Ending
		evaluated for				evaluated for				Balance			evaluated for				evaluated for			Balance		evaluated for		evaluated for		Balance
		impairment				impairment							impairment				impairment					impairment
																								impairment
	Owner occupied commercial real estate	$	1,758			$	13,194			$	14,952		$	2,737			$	13,304		$	16,041	$	855	$	22,501	$	23,356
	Income producing commercial real estate		866				8,789				9,655			1,917				8,379			10,296		2,404		5,458		7,862
	Commercial & industrial		8				3,434				3,442			15				3,240			3,255		253		3,994		4,247
	Commercial construction		598				4,737				5,335			729				4,018			4,747		469		3,508		3,977
	Residential mortgage		3,174				16,964				20,138			3,227				17,084			20,311		3,079		12,888		15,967
	Home equity lines of credit		29				4,292				4,321			47				4,527			4,574		67		6,053		6,120
	Residential construction		1,152				9,058				10,210			1,192				9,411			10,603		1,253		10,928		12,181
	Consumer installment		9				704				713			18				713			731		19		698		717
	Indirect auto		-				1,241				1,241			-				1,061			1,061		-		796		796
	Total allowance for loan losses		7,594				62,413				70,007			9,882				61,737			71,619		8,399		66,824		75,223
	Allowance for unfunded commitments		-				2,780				2,780			-				1,930			1,930		-		2,165		2,165
	Total allowance for credit losses	$	7,594			$	65,193			$	72,787		$	9,882			$	63,667		$	73,549	$	8,399	$	68,989	$	77,388
	Loans Outstanding
	Owner occupied commercial real estate	$	36,835			$	1,130,081			$	1,166,916		$	34,654			$	1,128,826		$	1,163,480	$	29,051	$	1,112,740	$	1,141,791
	Income producing commercial real estate		21,285				614,822				636,107			24,484				574,053			598,537		25,955		597,875		623,830
	Commercial & industrial		3,977				712,304				716,281			3,977				706,279			710,256		4,167		491,011		495,178
	Commercial construction		12,222				217,698				229,920			12,321				183,709			196,030		11,390		137,064		148,454
	Residential mortgage		21,934				841,377				863,311			18,775				847,014			865,789		21,303		845,312		866,615
	Home equity lines of credit		478				464,996				465,474			478				465,394			465,872		505		446,200		446,705
	Residential construction		10,027				281,232				291,259			11,604				287,023			298,627		12,409		305,340		317,749
	Consumer installment		148				102,437				102,585			179				104,720			104,899		340		106,651		106,991
	Indirect auto		-				315,836				315,836			-				268,629			268,629		-		208,395		208,395
	Total loans	$	106,906			$	4,680,783			$	4,787,689		$	106,472			$	4,565,647		$	4,672,119	$	105,120	$	4,250,588	$	4,355,708
Schedule of recorded investments in individually evaluated impaired loans		31-Mar-15											31-Dec-14									31-Mar-14
										Allowance										Allowance						Allowance
		Unpaid								for Loan			Unpaid							for Loan		Unpaid				for Loan
		Principal				Recorded				Losses			Principal				Recorded			Losses		Principal		Recorded		Losses
		Balance				Investment				Allocated			Balance				Investment			Allocated		Balance		Investment		Allocated
	With no related allowance recorded:
	Owner occupied commercial real estate	$	17,214			$	15,968			$	-		$	12,025			$	11,325		$	-	$	18,141	$	14,034	$	-
	Income producing commercial real estate		8,645				8,502				-			8,311				8,311			-		6,575		3,816		-
	Commercial & industrial		1,677				1,040				-			1,679				1,042			-		2,417		1,851		-
	Commercial construction		-				-				-			-				-			-		390		390		-
	Total commercial		27,536				25,510				-			22,015				20,678			-		27,523		20,091		-
	Residential mortgage		3,411				1,793				-			2,569				1,472			-		7,292		5,364		-
	Home equity lines of credit		-				-				-			-				-			-		-		-		-
	Residential construction		3,003				2,639				-			4,338				3,338			-		6,474		5,174		-
	Consumer installment		-				-				-			-				-			-		82		82		-
	Indirect auto		-				-				-			-				-			-		-		-		-
	Total with no related allowance recorded		33,950				29,942				-			28,922				25,488			-		41,371		30,711		-
	With an allowance recorded:
	Owner occupied commercial real estate		22,494				20,867				1,758			24,728				23,329			2,737		15,157		17,072		855
	Income producing commercial real estate		12,789				12,783				866			16,352				16,173			1,917		24,220		20,084		2,404
	Commercial & industrial		2,945				2,937				8			2,936				2,935			15		2,598		2,316		253
	Commercial construction		12,302				12,222				598			12,401				12,321			729		11,079		11,000		469
	Total commercial		50,530				48,809				3,230			56,417				54,758			5,398		53,054		50,472		3,981
	Residential mortgage		21,872				20,141				3,174			17,732				17,303			3,227		16,688		15,939		3,079
	Home equity lines of credit		478				478				29			478				478			47		505		505		67
	Residential construction		9,180				7,388				1,152			8,962				8,266			1,192		8,615		7,235		1,253
	Consumer installment		151				148				9			179				179			18		360		258		19
	Indirect auto		-				-				-			-				-			-		-		-		-
	Total with an allowance recorded		82,211				76,964				7,594			83,768				80,984			9,882		79,222		74,409		8,399
	Total	$	116,161			$	106,906			$	7,594		$	112,690			$	106,472		$	9,882	$	120,593	$	105,120	$	8,399
Schedule of average balances of impaired loans and income recognized on impaired loans		2015											2014
						Interest											Interest
						Revenue				Cash Basis							Revenue			Cash Basis
						Recognized				Interest							Recognized			Interest
		Average				During				Revenue			Average				During			Revenue
		Balance				Impairment				Received			Balance				Impairment			Received
	Owner occupied commercial real estate	$	36,989			$	460			$	459		$	29,109			$	358		$	380
	Income producing commercial real estate		21,424				267				275			25,860				312			333
	Commercial & industrial		4,023				38				37			4,560				53			51
	Commercial construction		12,273				116				121			12,714				112			135
	Total commercial		74,709				881				892			72,243				835			899
	Residential mortgage		22,085				226				233			21,321				229			238
	Home equity lines of credit		478				5				5			505				5			6
	Residential construction		10,575				120				126			13,037				145			150
	Consumer installment		153				3				3			448				6			9
	Indirect auto		-				-				-			-				-			-
	Total	$	108,000			$	1,235			$	1,259		$	107,554			$	1,220		$	1,302
Schedule of recorded investment in nonaccrual loans by loan class		Nonaccrual Loans
		March 31,				December 31,				March 31,
		2015				2014				2014
	Owner occupied commercial real estate	$	4,360			$	4,133			$	3,868
	Income producing commercial real estate		835				717				1,278
	Commercial & industrial		1,629				1,571				822
	Commercial construction		60				83				479
	Total commercial		6,884				6,504				6,447
	Residential mortgage		8,669				8,196				13,307
	Home equity lines of credit		693				695				1,106
	Residential construction		2,127				2,006				3,805
	Consumer installment		142				134				291
	Indirect auto		500				346				294
	Total	$	19,015			$	17,881			$	25,250
Schedule of aging of the recorded investment in past due loans		Loans Past Due															Loans Not
	As of March 31, 2015	30 - 59 Days				60 - 89 Days				> 90 Days			Total				Past Due			Total
	Owner occupied commercial real estate	$	1,965			$	1,130			$	1,573		$	4,668			$	1,162,248		$	1,166,916
	Income producing commercial real estate		62				-				440			502				635,605			636,107
	Commercial & industrial		790				1,001				1,405			3,196				713,085			716,281
	Commercial construction		-				-				44			44				229,876			229,920
	Total commercial		2,817				2,131				3,462			8,410				2,740,814			2,749,224
	Residential mortgage		4,290				1,566				2,558			8,414				854,897			863,311
	Home equity lines of credit		1,470				762				86			2,318				463,156			465,474
	Residential construction		1,018				1,343				245			2,606				288,653			291,259
	Consumer installment		485				61				80			626				101,959			102,585
	Indirect auto		261				133				202			596				315,240			315,836
	Total loans	$	10,341			$	5,996			$	6,633		$	22,970			$	4,764,719		$	4,787,689
	As of December 31, 2014
	Owner occupied commercial real estate	$	1,444			$	1,929			$	1,141		$	4,514			$	1,158,966		$	1,163,480
	Income producing commercial real estate		2,322				1,172				-			3,494				595,043			598,537
	Commercial & industrial		302				40				1,425			1,767				708,489			710,256
	Commercial construction		-				-				66			66				195,964			196,030
	Total commercial		4,068				3,141				2,632			9,841				2,658,462			2,668,303
	Residential mortgage		5,234				2,931				3,278			11,443				854,346			865,789
	Home equity lines of credit		961				303				167			1,431				464,441			465,872
	Residential construction		1,172				268				1,395			2,835				295,792			298,627
	Consumer installment		607				136				33			776				104,123			104,899
	Indirect auto		200				146				141			487				268,142			268,629
	Total loans	$	12,242			$	6,925			$	7,646		$	26,813			$	4,645,306		$	4,672,119
		Loans Past Due															Loans Not
	As of March 31, 2014	30 - 59 Days				60 - 89 Days				> 90 Days			Total				Past Due			Total
	Owner occupied commercial real estate	$	1,265			$	187			$	1,276		$	2,728			$	1,139,063		$	1,141,791
	Income producing commercial real estate		1,045				1,259				589			2,893				620,937			623,830
	Commercial & industrial		1,468				231				589			2,288				492,890			495,178
	Commercial construction		313				46				366			725				147,729			148,454
	Total commercial		4,091				1,723				2,820			8,634				2,400,619			2,409,253
	Residential mortgage		7,295				3,520				4,806			15,621				850,994			866,615
	Home equity lines of credit		1,554				551				502			2,607				444,098			446,705
	Residential construction		1,440				30				782			2,252				315,497			317,749
	Consumer installment		677				495				60			1,232				105,759			106,991
	Indirect auto		263				179				137			579				207,816			208,395
	Total loans	$	15,320			$	6,498			$	9,107		$	30,925			$	4,324,783		$	4,355,708
Schedule of TDRs including the number of loan contracts restructured and the pre- and post-modification recorded investment		31-Mar-15											31-Dec-14									31-Mar-14
						Pre-				Post-							Pre-			Post-				Pre-		Post-
						Modification				Modification							Modification			Modification				Modification		Modification
		Number				Outstanding				Outstanding			Number				Outstanding			Outstanding		Number		Outstanding		Outstanding
		of				Recorded				Recorded			of				Recorded			Recorded		of		Recorded		Recorded
		Contracts				Investment				Investment			Contracts				Investment			Investment		Contracts		Investment		Investment
	Owner occupied commercial real estate		52			$	30,600			$	29,201			54			$	27,695		$	26,296		46	$	24,194	$	22,471
	Income producing commercial real estate		28				14,525				14,525			31				18,094			17,915		32		20,936		18,488
	Commercial & industrial		32				2,902				2,902			32				2,848			2,847		35		3,574		3,292
	Commercial construction		14				11,268				11,188			14				11,360			11,280		14		11,678		11,598
	Total commercial		126				59,295				57,816			131				59,997			58,338		127		60,382		55,849
	Residential mortgage		162				21,343				20,600			154				18,630			17,836		148		21,163		19,657
	Home equity lines of credit		2				478				478			2				478			478		3		505		505
	Residential construction		47				8,824				7,388			48				8,962			8,265		52		10,400		9,518
	Consumer installment		17				148				148			17				179			179		26		442		340
	Indirect auto		-				-				-			-				-			-		-		-		-
	Total loans		354				90,088				86,430			352				88,246		$	85,096		356		92,892		85,869
Schedule of loans modified under the terms of TDR													Troubled Debt Restructurings
													Modified Within the Previous
													Twelve Months that Have
						Pre-				Post-			Subsequently Defaulted During
					Modification				Modification				the Three Months Ended
					Outstanding				Outstanding				March 31, 2015
	New Troubled Debt Restructurings for	Number of				Recorded				Recorded			Number of			Recorded
	the Three Months Ended March 31, 2015	Contracts				Investment				Investment			Contracts			Investment
	Owner occupied commercial real estate		2			$	4,497			$	4,497			-			$	-
	Income producing commercial real estate		2				255				255			-				-
	Commercial & industrial		2				188				188			-				-
	Commercial construction		-				-				-			-				-
	Total commercial		6				4,940				4,940			-				-
	Residential mortgage		15				1,598				1,598			-				-
	Home equity lines of credit		-				-				-			-				-
	Residential construction		-				-				-			-				-
	Consumer installment		1				3				3			1				30
	Indirect auto		-				-				-			-				-
	Total loans		22			$	6,541			$	6,541			1			$	30
													Troubled Debt Restructurings
													Modified Within the Previous
													Twelve Months that Have
						Pre-				Post-			Subsequently Defaulted During
					Modification				Modification				the Three Months Ended
					Outstanding				Outstanding				31-Mar-14
	New Troubled Debt Restructurings for	Number of				Recorded				Recorded			Number of			Recorded
	the Three Months Ended March 31, 2014	Contracts				Investment				Investment			Contracts			Investment
	Owner occupied commercial real estate		2			$	605			$	605			1			$	104
	Income producing commercial real estate		2				533				533			-				-
	Commercial & industrial		1				224				224			2				54
	Commercial construction		1				231				231			-				-
	Total commercial		6				1,593				1,593			3				158
	Residential mortgage		14				1,132				1,132			4				452
	Home equity lines of credit		-				-				-			-				-
	Residential construction		-				-				-			-				-
	Consumer installment		2				142				142			-				-
	Indirect auto		-				-				-			-				-
	Total loans		22			$	2,867			$	2,867			7			$	610
Schedule of risk category of loans by class of loans										Substandard							Doubtful /
	As of March 31, 2015	Pass				Watch				Performing			Nonaccrual				Loss			Total
	Owner occupied commercial real estate	$	1,097,075			$	21,594			$	43,887		$	4,360			$	-		$	1,166,916
	Income producing commercial real estate		600,976				14,415				19,881			835				-			636,107
	Commercial & industrial		704,714				3,234				6,704			1,629				-			716,281
	Commercial construction		223,810				2,522				3,528			60				-			229,920
	Total commercial		2,626,575				41,765				74,000			6,884				-			2,749,224
	Residential mortgage		813,075				11,185				30,382			8,669				-			863,311
	Home equity lines of credit		458,577				470				5,734			693				-			465,474
	Residential construction		275,567				4,061				9,504			2,127				-			291,259
	Consumer installment		101,142				-				1,301			142				-			102,585
	Indirect auto		314,540				-				796			500				-			315,836
	Total loans	$	4,589,476			$	57,481			$	121,717		$	19,015			$	-		$	4,787,689
	As of December 31, 2014
	Owner occupied commercial real estate	$	1,094,057			$	18,889			$	46,401		$	4,133			$	-		$	1,163,480
	Income producing commercial real estate		560,559				16,701				20,560			717				-			598,537
	Commercial & industrial		696,805				4,017				7,863			1,571				-			710,256
	Commercial construction		190,070				2,311				3,566			83				-			196,030
	Total commercial		2,541,491				41,918				78,390			6,504				-			2,668,303
	Residential mortgage		814,168				11,594				31,831			8,196				-			865,789
	Home equity lines of credit		459,881				-				5,296			695							465,872
	Residential construction		280,166				5,535				10,920			2,006				-			298,627
	Consumer installment		103,383				-				1,382			134				-			104,899
	Indirect auto		267,709				-				574			346				-			268,629
	Total loans	$	4,466,798			$	59,047			$	128,393		$	17,881			$	-		$	4,672,119
	As of March 31, 2014
	Owner occupied commercial real estate	$	1,059,528			$	30,869			$	47,525		$	3,868			$	-		$	1,141,791
	Income producing commercial real estate		577,771				7,982				36,800			1,278				-			623,830
	Commercial & industrial		481,310				4,905				8,141			822				-			495,178
	Commercial construction		138,560				4,134				5,281			479				-			148,454
	Total commercial		2,257,169				47,890				97,747			6,447				-			2,409,253
	Residential mortgage		799,145				10,591				43,572			13,307				-			866,615
	Home equity lines of credit		437,908				29				7,662			1,106				-			446,705
	Residential construction		292,032				8,935				12,977			3,805				-			317,749
	Consumer installment		104,379				11				2,310			291				-			106,991
	Indirect auto		207,504				-				597			294				-			208,395
	Total loans	$	4,098,137			$	67,456			$	164,865		$	25,250			$	-		$	4,355,708

SBA_Servicing_Rights_Tables

SBA Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2015
Transfers and Servicing [Abstract]
Schedule of changes in the balances of servicing assets and servicing liabilities subsequently measured using the fair value measurement method	ASC 860 Servicing Asset Rollforward
	Fair value as of January 1, 2015	$	2,551
	Additions:
	Originated servicing rights capitalized upon sale of loans		190
	Subtractions:
	Disposals		-
	Changes in fair value:
	Due to change in valuation inputs or assumptions used in the valuation model		(24	)
	Fair value as of March 31, 2015	$	2,717
Schedule of key characteristics, inputs, and economic assumptions used to estimate the fair value of SBA Servicing Asset		March 31,			December 31,
		2015			2014
	Fair value of retained Servicing Assets	$	2,717		$	2,551
	Prepayment rate assumption		7.26	%		6.7	%
	10% adverse change	$	(75	)	$	(62	)
	20% adverse change	$	(146	)	$	(122	)
	Discount rate		11.1	%		12	%
	100 bps adverse change	$	(101	)	$	(85	)
	200bps adverse change	$	(196	)	$	(164	)
	Weighted-average life (months)		7.1			6.5
	Weighted-average gross margin		2.13	%		2	%

Reclassifications_Out_of_Accum1

Reclassifications Out of Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]
Schedule of reclassifications out of accumulated other comprehensive income		Amounts Reclassified from
			Accumulated Other
			Comprehensive Income
		For the three months ended
	Details about Accumulated Other		March 31,						Affected Line Item in the Statement
	Comprehensive Income Components		2015			2014			Where Net Income is Presented
	Realized gains on sales of available-for-sale securities:
			$	1,539		$	217		Securities gains, net
				(598	)		(92	)	Tax expense
			$	941		$	125		Net of tax
	Amortization of (losses) gains included in net income on available-for-sale securities transferred to held to maturity:
			$	(484	)	$	(330	)	Investment securities interest revenue
				182			123		Tax benefit (expense)
			$	(302	)	$	(207	)	Net of tax
	Gains included in net income on derivative financial instruments accounted for as cash flow hedges:
	Effective portion of interest rate contracts		$	-		$	(97	)	Time deposit interest expense
	Amortization of losses on de-designated positions			(48	)		-		Deposits in banks and short-term investments interest revenue
	Amortization of losses on de-designated positions			(119	)		-		Money market deposit interest expense
	Amortization of losses on de-designated positions			(258	)		-		Federal Home Loan Bank advances interest expense
				(425	)		(97	)	Total before tax
				165			38		Tax or benefit (expense)
			$	(260	)	$	(59	)	Net of tax
	Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan
	Prior service cost		$	(91	)	$	(91	)	Salaries and employee benefits expense
	Actuarial losses			(68	)		-		Salaries and employee benefits expense
				(159	)		(91	)	Total before tax
				62			35		Tax benefit
			$	(97	)	$	(56	)	Net of tax
	Total reclassifications for the period		$	282		$	(197	)	Net of tax
	Amounts shown above in parentheses reduce earnings

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of accrued dividends on preferred stock, including accretion of discounts		Three Months Ended
		March 31,
		2015		2014
	Series B - 5% fixed until December 6, 2013, 9% thereafter	$	-	$	159
	Series D - LIBOR plus 9.6875%, resets quarterly		-		280
	Total preferred stock dividends	$	-	$	439
Schedule of computation of basic and diluted loss per share		Three Months Ended
		March 31,
		2015		2014
	Net income available to common shareholders	$	17,670	$	14,961
	Weighted average shares outstanding:
	Basic		60,905		60,059
	Effect of dilutive securities
	Stock options		4		2
	Diluted		60,909		60,061
	Net income per common share:
	Basic	$	0.29	$	0.25
	Diluted	$	0.29	$	0.25

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2015
Derivatives and Hedging Activities [Abstract]
Schedule of derivative financial instruments on consolidated balance sheet	Derivatives designated as hedging instruments under ASC 815
					Fair Value
			Balance Sheet		March 31,			December 31,				March 31,
	Interest Rate Products		Location		2015				2014			2014
	Cash flow hedge of money market deposits		Other assets		$	-			$	-		$	2,971
	Fair value hedge of brokered CD’s		Other assets			5				-			-
	Fair value hedge of corporate bonds		Other assets			-				-			2,655
					$	5			$	-		$	5,626
	Cash flow hedge of short-term debt		Other liabilities		$	-			$	-		$	3,650
	Cash flow hedge of money market deposits		Other liabilities			-				350			678
	Fair value hedge of AFS security		Other liabilities			345				-			-
	Fair value hedge of brokered CD’s		Other liabilities			3,452				5,817			14,119
	Fair value hedge of corporate bonds		Other liabilities			-				-			2,729
					$	3,797			$	6,167		$	21,176
	Derivatives not designated as hedging instruments under ASC 815
					Fair Value
			Balance Sheet		March 31,				December 31,			March 31,
	Interest Rate Products		Location		2015				2014			2014
	Customer swap positions		Other assets		$	5,043			$	3,433		$	1,359
	Dealer offsets to customer swap positions		Other assets			-				128			825
	Bifurcated embedded derivatives		Other assets			8,117				12,262			13,753
	Offsetting positions for de-designated cash flow hedges		Other assets			7,126				4,776			-
					$	20,286			$	20,599		$	15,937
	Customer swap positions		Other liabilities		$	-			$	129		$	825
	Dealer offsets to customer swap positions		Other liabilities			5,107				3,456			1,377
	Dealer offsets to bifurcated embedded derivatives		Other liabilities			13,244				17,467			18,931
	De-designated cash flow hedges		Other liabilities			7,128				4,778			-
					$	25,479			$	25,830		$	21,133
Schedule of effect of fair value hedging derivative financial instruments on the consolidated statement of operations	Derivatives in Fair Value Hedging Relationships (in thousands).
		Location of Gain		Amount of Gain (Loss)							Amount of Gain (Loss)
		(Loss) Recognized		Recognized in Income							Recognized in Income
		in Income on		on Derivative							on Hedged Item
		Derivative		2015				2014			2015			2014
	Three Months Ended March 31,
	Fair value hedges of brokered CD’s	Interest expense		$	2,370			$	5,853		$	(2,405	)	$	(6,034	)
	Fair value hedges of corporate bonds	Interest revenue			(345	)			(1,704	)		343			1,496
				$	2,025			$	4,149		$	(2,062	)	$	(4,538	)
Schedule of effect of cash flow hedging derivative financial instruments on other comprehensive income	Derivatives in Cash Flow Hedging Relationships (in thousands).
			Amount of Gain (Loss)							Gain (Loss) Reclassified from Accumulated							Gain (Loss) Recognized in Income on
			Recognized in Other							Other Comprehensive Income into Income							Derivative (Ineffective Portion)
			Comprehensive Income							(Effective Portion)
			on Derivative (Effective
			Portion)
			2015				2014			Location		2015			2014		Location		2015			2014
	Three Months Ended March 31,
	Interest rate swaps		$	(471	) $			(2,833	)	Interest Expense	$	(425	)	$	(97	)	Interest expense	$	(7	)	$	(35	)

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]
Schedule of stock option activity							Weighted-
							Average		Aggregate
					Weighted-		Remaining		Intrinisic
					Average Exercise		Contractual		Value
	Options	Shares			Price		Term (Years)		$0
	Outstanding at December 31, 2014		313,555		$	93.4
	Expired		(12,211	)		103.12
	Outstanding at March 31, 2015		301,344			93.01		2.7	$	118
	Exercisable at March 31, 2015		285,095			97.43		2.3		63
Schedule of restricted stock units activity	Restricted Stock Unit Awards	Shares			Weighted-
					Average Grant-
					Date Fair Value
	Outstanding at December 31, 2014		829,201		$	14.76
	Granted		95,167			18.06
	Vested		(100,607	)		15.36
	Cancelled		(50,457	)		15.09
	Outstanding at March 31, 2015		773,304			15.07
	Vested at March 31, 2015		7,580			9.9

Assets_and_Liabilities_Measure1

Assets and Liabilities Measured at Fair Value (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value [Abstract]
Schedule of assets and liabilities measured at fair value on a recurring basis	31-Mar-15	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
	U.S. Treasuries	$	48,414		$	-		$	-			$	48,414
	U.S. Government agencies		-			37,268			-				37,268
	State and political subdivisions		-			16,352			-				16,352
	Mortgage-backed securities		-			1,041,114			-				1,041,114
	Corporate bonds		-			186,957			750				187,707
	Asset-backed securities		-			468,728			-				468,728
	Other		-			2,390			-				2,390
	Deferred compensation plan assets		3,366			-			-				3,366
	SBA servicing rights		-			-			2,717				2,717
	Derivative financial instruments		-			12,174			8,117				20,291
	Total assets	$	51,780		$	1,764,983		$	11,584			$	1,828,347
	Liabilities:
	Deferred compensation plan liability	$	3,366		$	-		$	-			$	3,366
	Derivative financial instruments		-			14,747			14,529				29,276
	Total liabilities	$	3,366		$	14,747		$	14,529			$	32,642
	31-Dec-14	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
	U.S. Treasuries	$	105,709		$	-		$	-			$	105,709
	U.S. Government agencies		-			36,299			-				36,299
	State and political subdivisions		-			20,233			-				20,233
	Mortgage-backed securities		-			996,820			-				996,820
	Corporate bonds		-			164,878			750				165,628
	Asset-backed securities		-			455,928			-				455,928
	Other		-			2,117			-				2,117
	Deferred compensation plan assets		3,864			-			-				3,864
	SBA servicing rights					-			2,551				2,551
	Derivative financial instruments		-			8,337			12,262				20,599
	Total assets	$	109,573		$	1,684,612		$	15,563			$	1,809,748
	Liabilities:
	Deferred compensation plan liability	$	3,864		$	-		$	-			$	3,864
	Derivative financial instruments		-			13,018			18,979				31,997
	Total liabilities	$	3,864		$	13,018		$	18,979			$	35,861
	31-Mar-14	Level 1			Level 2			Level 3				Total
	Assets:
	Securities available for sale:
	State and political subdivisions	$	-		$	23,006		$	-			$	23,006
	Mortgage-backed securities		-			1,128,112			-				1,128,112
	Corporate bonds		-			251,574			350				251,924
	Asset-backed securities		-			432,062			-				432,062
	Other		-			2,572			-				2,572
	Deferred compensation plan assets		3,468			-			-				3,468
	Derivative financial instruments		-			21,563			-				21,563
	Total assets	$	3,468		$	1,858,889		$	350			$	1,862,707
	Liabilities:
	Deferred compensation plan liability	$	3,468		$	-		$	-			$	3,468
	Brokered certificates of deposit		-			177,726			-				177,726
	Derivative financial instruments		-			42,309			-				42,309
	Total liabilities	$	3,468		$	220,035		$	-			$	223,503
Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs		Three Months Ended March 31
		2015													2014
		Derivative			Derivative			SBA				Securities			Securities
		Asset			Liability			servicing				Available-for-			Available-for-
								rights				Sale			Sale
	Balance at beginning of period	$	12,262		$	18,979		$	2,551			$	750		$	350
	Purchases		-			-			-				-			-
	Additions		-			-			190				-			-
	Sales and settlements		-			-			-				-			-
	Other comprehensive income		-			-			-				-			-
	Amounts included in earnings - fair value adjustments		(4,145	)		(4,450	)		(24	)			-			-
	Transfers between valuation levels, net		-			-			-				-			-
	Balance at end of period	$	8,117		$	14,529		$	2,717			$	750		$	350
Schedule of quantitative information about Level 3 fair value measurements for fair value on a recurring basis		Fair Value												Weighted Average
		March 31,			December 31,			March 31,			Valuation			March 31,			December 31,
	Level 3 Assets	2015			2014			2014			Technique		Unobservable  Inputs	2015			2014
	SBA Servicing Rights	$	2,717		$	2,551		$	-		Discounted		Discount rate		11.1	%		12	%
											cash flow		Prepayment Rate		7.26	%		6.7	%
	Corporate Bonds		750			750			350		Indicative bid provided by a broker		Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company		N/A			N/A
	Derivatives assets		8,117			12,262			-		Dealer Priced		Dealer Priced		N/A			N/A
	Derivative liabilities		14,529			18,979			-		Dealer Priced		Dealer Priced		N/A			N/A
Schedule of presentation of united's assets and liabilities measured at fair value on nonrecurring basis	31-Mar-15	Level 1			Level 2			Level 3				Total
	Assets
	Loans	$	-		$	-		$	80,432			$	80,432
	Foreclosed properties		-			-			1,021				1,021
	Total	$	-		$	-		$	81,453			$	81,453
	31-Dec-14
	Assets
	Loans	$	-		$	-		$	83,541			$	83,541
	Foreclosed properties		-			-			1,555				1,555
	Total	$	-		$	-		$	85,096			$	85,096
	31-Mar-14
	Assets
	Loans	$	-		$	-		$	79,918			$	79,918
	Foreclosed properties		-			-			3,120				3,120
	Total	$	-		$	-		$	83,038			$	83,038
Schedule of carrying amount and fair values for other financial instruments that are not measured at fair value on a recurring basis		Carrying			Fair Value Level
	31-Mar-15	Amount			Level 1			Level 2				Level 3			Total
	Assets:
	Securities held to maturity	$	399,228		$	-		$	413,550			$	-		$	413,550
	Loans, net		4,717,682			-			-				4,686,611			4,686,611
	Mortgage loans held for sale		15,723			-			16,181				-			16,181
	Liabilities:
	Deposits		6,437,931			-			6,438,984				-			6,438,984
	Federal Home Loan Bank advances		270,125			-			270,124				-			270,124
	Long-term debt		113,901			-			-				116,919			116,919
	31-Dec-14
	Assets:
	Securities held to maturity		415,267			-			425,233				-			425,233
	Loans, net		4,600,500			-			-				4,549,027			4,549,027
	Mortgage loans held for sale		13,737			-			14,139				-			14,139
	Liabilities:
	Deposits		6,326,513			-			6,328,264				-			6,328,264
	Federal Home Loan Bank advances		270,125			-			270,125				-			270,125
	Long-term debt		129,865			-			-				132,814			132,814
	31-Mar-14
	Assets:
	Securities held to maturity		464,697			-			473,136				-			473,136
	Loans, net		4,280,485			-			-				4,201,255			4,201,255
	Mortgage loans held for sale		10,933			-			11,121				-			11,121
	Liabilities:
	Deposits		6,247,541			-			6,238,927				-			6,238,927
	Federal Home Loan Bank advances		50,125			-			50,125				-			50,125
	Long-term debt		129,865			-			-				130,636			130,636

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of contractual amount of off-balance sheet instruments		31-Mar-15		31-Dec-14		31-Mar-14
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit	$	972,819	$	878,160	$	720,891
	Letters of credit		24,310		19,861		19,960

Acquisition_Detail_Textuals

Acquisition (Detail Textuals) (Business Carolina, Inc, USD $)	1 Months Ended
	Jun. 26, 2014
Business Carolina, Inc
Business Acquisition [Line Items]
Cash paid for loan	$31,300,000
Loans	24,800,000
Accrued interest	83,000
Servicing rights	2,130,000
Premises and equipment	2,600,000
Goodwill	1,510,000
Gross contractual amount of loans receivable	$28,000,000

Balance_Sheet_Offsetting_Summa

Balance Sheet Offsetting - Summary of amounts outstanding under master netting agreements (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Offsetting [Abstract]
Repurchase agreements / reverse repurchase agreements, gross amounts of recognized assets	$345,000	$395,000	$397,000
Repurchase agreements / reverse repurchase agreements, gross amounts offset on balance sheet assets	-325,000	-375,000	-350,000
Repurchase agreements / reverse repurchase agreements, net assets balance	20,000	20,000	47,000
Repurchase agreements / reverse repurchase agreements, gross amounts not off set in balance sheet assets of financial instruments
Repurchase agreements / reverse repurchase agreements, gross amounts not off set in balance sheet assets of collateral received	-21,048	-20,302	-51,243
Repurchase agreements / reverse repurchase agreements, net amount
Derivatives, gross amounts of recognized assets	20,291	20,599	21,563
Derivatives, gross amounts offset on the balance sheet
Derivatives, net asset balance	20,291	20,599	21,563
Derivatives, gross amounts not off set in balance sheet assets of financial instruments	-597	-869	-3,896
Derivatives, gross amounts not off set in balance sheet assets of collateral received	-4,435	-3,716	-704
Derivatives, net amount	15,259	16,014	16,963
Offsetting assets, gross amounts of recognized assets	365,291	415,599	418,563
Offsetting assets, gross amounts offset on balance sheet	-325,000	-375,000	-350,000
Offsetting assets, net asset balance	40,291	40,599	68,563
Offsetting assets, gross amounts not offset in balance sheet of financial instruments	-597	-869	-3,896
Offsetting assets, gross amounts not offset in the balance sheet of collateral received	-25,483	-24,018	-51,947
Offsetting assets, net amount	15,259	16,014	16,963
Weighted average interest rate of reverse repurchase agreements, assets	1.18%	1.16%	1.09%
Repurchase agreements / reverse repurchase agreements, gross amounts of recognized liabilities	325,000	375,000	350,000
Repurchase agreements / reverse repurchase agreements, gross amounts offset on balance sheet liabilities	-325,000	-375,000	-350,000
Repurchase agreements / reverse repurchase agreements, net liabilities balance
Repurchase agreements / reverse repurchase agreements, gross amounts not off set in balance sheet liabilities of financial instruments
Repurchase agreements / reverse repurchase agreements, gross amounts not off set in balance sheet liabilities of collateral pledged
Repurchase agreements / reverse repurchase agreements, net amount
Derivatives, gross amounts of recognized liabilities	29,276	31,997	42,309
Derivatives, gross amounts offset on balance sheet liabilities
Derivatives, net liabilities balance	29,276	31,997	42,309
Derivatives, gross amounts not off set in balance sheet liabilities of financial instruments	-597	-869	-3,896
Derivatives, gross amounts not off set in balance sheet liabilities of collateral pledged	-31,407	-32,792	-35,754
Derivatives, net amount			2,659
Offsetting liabilities, gross amounts of recognized liabilities	354,276	406,997	392,309
Offsetting liabilities, gross amounts offset on balance sheet	-325,000	-375,000	-350,000
Offsetting liabilities, net liabilities balance	29,276	31,997	42,309
Offsetting liabilities, gross amounts not offset in balance sheet of financial instruments	-597	-869	-3,896
Offsetting liabilities, gross amounts not offset in the balance sheet of collateral pledged	-31,407	-32,792	-35,754
Offsetting liabilities, net amount			$2,659
Weighted average interest rate of reverse repurchase agreements, liabilities	30.00%	0.29%	0.28%

Securities_Amortized_cost_gros

Securities - Amortized cost, gross unrealized gains and losses and fair value of securities held to maturity (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
In Thousands, unless otherwise specified
Held-to-maturity securities:
Amortized Cost	$399,228		$415,267		$464,697
Gross Unrealized Gains	14,499		11,220		10,307
Gross Unrealized Losses	177		1,254		1,868
Held-to-Maturity, Fair value	413,550		425,233		473,136
State and political subdivisions
Held-to-maturity securities:
Amortized Cost	48,136		48,157		51,257
Gross Unrealized Gains	4,029		3,504		3,430
Gross Unrealized Losses					13
Held-to-Maturity, Fair value	52,165		51,661		54,674
Mortgage-backed securities
Held-to-maturity securities:
Amortized Cost	351,092	[1]	367,110	[1]	413,440	[1]
Gross Unrealized Gains	10,470	[1]	7,716	[1]	6,877	[1]
Gross Unrealized Losses	177	[1]	1,254	[1]	1,855	[1]
Held-to-Maturity, Fair value	$361,385	[1]	$373,572	[1]	$418,462	[1]
[1]	All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.

Securities_Summary_of_held_to_

Securities - Summary of held to maturity securities in unrealized loss position (Details 1) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Summary of held to maturity securities in an unrealized loss position
Fair Value, Less than 12 Months	$16,177	$126,514	$201,912
Unrealized Loss, Less than 12 Months	140	917	1,734
Fair Value, 12 Months or More	6,252	17,053	1,644
Unrealized Loss, 12 Months or More	37	337	134
Fair Value, Total	22,429	143,567	203,556
Unrealized Loss, Total	177	1,254	1,868
State and political subdivisions
Summary of held to maturity securities in an unrealized loss position
Fair Value, Less than 12 Months			1,628
Unrealized Loss, Less than 12 Months			13
Fair Value, 12 Months or More
Unrealized Loss, 12 Months or More
Fair Value, Total			1,628
Unrealized Loss, Total			13
Mortgage-backed securities
Summary of held to maturity securities in an unrealized loss position
Fair Value, Less than 12 Months	16,177	126,514	200,284
Unrealized Loss, Less than 12 Months	140	917	1,721
Fair Value, 12 Months or More	6,252	17,053	1,644
Unrealized Loss, 12 Months or More	37	337	134
Fair Value, Total	22,429	143,567	201,928
Unrealized Loss, Total	$177	$1,254	$1,855

Securities_Cost_basis_unrealiz

Securities - Cost basis, unrealized gains and losses, and fair value of securities available for sale (Details 2) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
In Thousands, unless otherwise specified
Investment securities available for sale:
Amortized Cost	$1,779,021		$1,772,535		$1,835,773
Gross Unrealized Gains	27,909		20,955		18,674
Gross Unrealized Losses	4,957		10,756		16,771
Available-for-Sale, Fair Value	1,801,973		1,782,734		1,837,676
U.S. Treasuries
Investment securities available for sale:
Amortized Cost	47,661		105,540
Gross Unrealized Gains	753		235
Gross Unrealized Losses			66
Available-for-Sale, Fair Value	48,414		105,709
U.S. Government agencies
Investment securities available for sale:
Amortized Cost	36,508		36,474
Gross Unrealized Gains	760
Gross Unrealized Losses			175
Available-for-Sale, Fair Value	37,268		36,299
State and political subdivisions
Investment securities available for sale:
Amortized Cost	15,864		19,748		22,244
Gross Unrealized Gains	491		504		842
Gross Unrealized Losses	3		19		80
Available-for-Sale, Fair Value	16,352		20,233		23,006
Mortgage-backed securities
Investment securities available for sale:
Amortized Cost	1,023,809	[1]	988,012	[1]	1,126,227	[1]
Gross Unrealized Gains	20,986	[1]	16,273	[1]	13,213	[1]
Gross Unrealized Losses	3,681	[1]	7,465	[1]	11,328	[1]
Available-for-Sale, Fair Value	1,041,114	[1]	996,820	[1]	1,128,112	[1]
Corporate bonds
Investment securities available for sale:
Amortized Cost	186,126		165,018		255,238
Gross Unrealized Gains	2,107		1,686		1,616
Gross Unrealized Losses	526		1,076		4,930
Available-for-Sale, Fair Value	187,707		165,628		251,924
Asset-backed securities
Investment securities available for sale:
Amortized Cost	466,663		455,626		429,492
Gross Unrealized Gains	2,812		2,257		3,003
Gross Unrealized Losses	747		1,955		433
Available-for-Sale, Fair Value	468,728		455,928		432,062
Other
Investment securities available for sale:
Amortized Cost	2,390		2,117		2,572
Gross Unrealized Gains
Gross Unrealized Losses
Available-for-Sale, Fair Value	$2,390		$2,117		$2,572
[1]	All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.

Securities_Summary_of_availabl

Securities - Summary of available for sale securities in unrealized loss position (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months	$202,246	$420,951	$564,894
Unrealized Loss, Less than 12 Months	1,456	2,669	6,723
Fair Value, 12 Months or More	249,256	313,204	261,610
Unrealized Loss, 12 Months or More	3,501	8,087	10,048
Fair Value, Total	451,502	734,155	826,504
Unrealized Loss, Total	4,957	10,756	16,771
U.S. Treasuries
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months		34,180
Unrealized Loss, Less than 12 Months		66
Fair Value, 12 Months or More
Unrealized Loss, 12 Months or More
Fair Value, Total		34,180
Unrealized Loss, Total		66
U.S. Government agencies
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months		36,299
Unrealized Loss, Less than 12 Months		175
Fair Value, 12 Months or More
Unrealized Loss, 12 Months or More
Fair Value, Total		36,299
Unrealized Loss, Total		175
State and political subdivisions
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months	2,957	2,481	3,595
Unrealized Loss, Less than 12 Months	3	19	80
Fair Value, 12 Months or More
Unrealized Loss, 12 Months or More
Fair Value, Total	2,957	2,481	3,595
Unrealized Loss, Total	3	19	80
Mortgage-backed securities
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months	51,339	88,741	342,886
Unrealized Loss, Less than 12 Months	363	446	3,817
Fair Value, 12 Months or More	219,027	251,977	186,290
Unrealized Loss, 12 Months or More	3,318	7,019	7,511
Fair Value, Total	270,366	340,718	529,176
Unrealized Loss, Total	3,681	7,465	11,328
Corporate bonds
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months	10,474	37,891	82,337
Unrealized Loss, Less than 12 Months	526	371	2,393
Fair Value, 12 Months or More		20,275	75,320
Unrealized Loss, 12 Months or More		705	2,537
Fair Value, Total	10,474	58,166	157,657
Unrealized Loss, Total	526	1,076	4,930
Asset-backed securities
Summary of available for sale securities in an unrealized loss position
Fair Value, Less than 12 Months	137,476	221,359	136,076
Unrealized Loss, Less than 12 Months	564	1,592	433
Fair Value, 12 Months or More	30,229	40,952
Unrealized Loss, 12 Months or More	183	363
Fair Value, Total	167,705	262,311	136,076
Unrealized Loss, Total	$747	$1,955	$433

Securities_Summary_of_securiti

Securities - Summary of securities sales activity (Details 4) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment Securities [Abstract]
Proceeds from sales	$69,467	$153,316
Gross gains on sales	1,539	410
Gross losses on sales		-193
Net gains on sales of securities	1,539	217
Income tax expense attributable to sales	$598	$92

Securities_Amortized_cost_and_

Securities - Amortized cost and fair value of held to maturity and available for sale securities (Details 5) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
In Thousands, unless otherwise specified
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost	$1,779,021		$1,772,535		$1,835,773
Available-for-Sale, Fair Value	1,801,973		1,782,734		1,837,676
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost	399,228		415,267		464,697
Held-to-Maturity, Fair value	413,550		425,233		473,136
U.S. Treasuries
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, 1 to 5 years	47,661
Available-for-Sale, Fair Value, 1 to 5 years	48,414
Available-for-Sale, Amortized Cost	47,661		105,540
Available-for-Sale, Fair Value	48,414		105,709
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, 1 to 5 years
Held-to-Maturity, Fair Value, 1 to 5 years
Held-to-Maturity, Amortized Cost
Held-to-Maturity, Fair value
U.S. Government agencies
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, 5 to 10 years	36,508
Available-for-Sale, Fair Value, 5 to 10 years	37,268
Available-for-Sale, Amortized Cost	36,508		36,474
Available-for-Sale, Fair Value	37,268		36,299
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, 5 to 10 years
Held-to-Maturity, Fair Value, 5 to 10 years
Held-to-Maturity, Amortized Cost
Held-to-Maturity, Fair value
State and political subdivisions
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, Within 1 year	5,368
Available-for-Sale, Fair Value, Within 1 year	5,442
Available-for-Sale, Amortized Cost, 1 to 5 years	7,550
Available-for-Sale, Fair Value, 1 to 5 years	7,821
Available-for-Sale, Amortized Cost, 5 to 10 years	2,098
Available-for-Sale, Fair Value, 5 to 10 years	2,201
Available-for-Sale, Amortized Cost, More than 10 years	848
Available-for-Sale, Fair Value, More than 10 years	888
Available-for-Sale, Amortized Cost	15,864		19,748		22,244
Available-for-Sale, Fair Value	16,352		20,233		23,006
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, Within 1 year	1,000
Held-to-Maturity, Fair Value, Within 1 year	1,007
Held-to-Maturity, Amortized Cost, 1 to 5 years	18,689
Held-to-Maturity, Fair Value, 1 to 5 years	20,005
Held-to-Maturity, Amortized Cost, 5 to 10 years	19,641
Held-to-Maturity, Fair Value, 5 to 10 years	21,371
Held-to-Maturity, Amortized Cost, More than 10 years	8,806
Held-to-Maturity, Fair Value, More than 10 years	9,782
Held-to-Maturity, Amortized Cost	48,136
Held-to-Maturity, Fair value	52,165
Corporate bonds
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, 1 to 5 years	37,870
Available-for-Sale, Fair Value, 1 to 5 years	38,009
Available-for-Sale, Amortized Cost, 5 to 10 years	115,749
Available-for-Sale, Fair Value, 5 to 10 years	117,333
Available-for-Sale, Amortized Cost, More than 10 years	32,507
Available-for-Sale, Fair Value, More than 10 years	32,365
Available-for-Sale, Amortized Cost	186,126		165,018		255,238
Available-for-Sale, Fair Value	187,707		165,628		251,924
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, 1 to 5 years
Held-to-Maturity, Fair Value, 1 to 5 years
Held-to-Maturity, Amortized Cost, 5 to 10 years
Held-to-Maturity, Fair Value, 5 to 10 years
Held-to-Maturity, Amortized Cost, More than 10 years
Held-to-Maturity, Fair Value, More than 10 years
Held-to-Maturity, Amortized Cost
Held-to-Maturity, Fair value
Asset-backed securities
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, 1 to 5 years	247,650
Available-for-Sale, Fair Value, 1 to 5 years	249,360
Available-for-Sale, Amortized Cost, 5 to 10 years	58,575
Available-for-Sale, Fair Value, 5 to 10 years	59,053
Available-for-Sale, Amortized Cost, More than 10 years	160,438
Available-for-Sale, Fair Value, More than 10 years	160,315
Available-for-Sale, Amortized Cost	466,663		455,626		429,492
Available-for-Sale, Fair Value	468,728		455,928		432,062
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, 1 to 5 years
Held-to-Maturity, Fair Value, 1 to 5 years
Held-to-Maturity, Amortized Cost, 5 to 10 years
Held-to-Maturity, Fair Value, 5 to 10 years
Held-to-Maturity, Amortized Cost, More than 10 years
Held-to-Maturity, Fair Value, More than 10 years
Held-to-Maturity, Amortized Cost
Held-to-Maturity, Fair value
Other
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, Within 1 year	442
Available-for-Sale, Fair Value, Within 1 year	442
Available-for-Sale, Amortized Cost, More than 10 years	1,948
Available-for-Sale, Fair Value, More than 10 years	1,948
Available-for-Sale, Amortized Cost	2,390		2,117		2,572
Available-for-Sale, Fair Value	2,390		2,117		2,572
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, Within 1 year
Held-to-Maturity, Fair Value, Within 1 year
Held-to-Maturity, Amortized Cost, More than 10 years
Held-to-Maturity, Fair Value, More than 10 years
Held-to-Maturity, Amortized Cost
Held-to-Maturity, Fair value
Total securities other than mortgage-backed securities
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost, Within 1 year	5,810
Available-for-Sale, Fair Value, Within 1 year	5,884
Available-for-Sale, Amortized Cost, 1 to 5 years	340,731
Available-for-Sale, Fair Value, 1 to 5 years	343,604
Available-for-Sale, Amortized Cost, 5 to 10 years	212,930
Available-for-Sale, Fair Value, 5 to 10 years	215,855
Available-for-Sale, Amortized Cost, More than 10 years	195,741
Available-for-Sale, Fair Value, More than 10 years	195,516
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost, Within 1 year	1,000
Held-to-Maturity, Fair Value, Within 1 year	1,007
Held-to-Maturity, Amortized Cost, 1 to 5 years	18,689
Held-to-Maturity, Fair Value, 1 to 5 years	20,005
Held-to-Maturity, Amortized Cost, 5 to 10 years	19,641
Held-to-Maturity, Fair Value, 5 to 10 years	21,371
Held-to-Maturity, Amortized Cost, More than 10 years	8,806
Held-to-Maturity, Fair Value, More than 10 years	9,782
Mortgage-backed securities
Available for Sale - Amortized Cost and Fair Value
Available-for-Sale, Amortized Cost	1,023,809	[1]	988,012	[1]	1,126,227	[1]
Available-for-Sale, Fair Value	1,041,114	[1]	996,820	[1]	1,128,112	[1]
Held to Maturity - Amortized Cost and Fair Value
Held-to-Maturity, Amortized Cost	351,092
Held-to-Maturity, Fair value	$361,385
[1]	All are residential type mortgage-backed securities and U.S.government agency commercial mortgage backed securities.

Securities_Detail_Textuals

Securities (Detail Textuals) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Billions, unless otherwise specified	Security
Investment Securities [Abstract]
Number of available for sale securities in unrealized loss position	79
Carrying value of secure public deposits, FHLB advances and other secured borrowings	$1.36	$1.51	$1.48

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses - Major classifications of loans (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Classifications of loans
Total loans	$4,787,689	$4,672,119	$4,355,708
Less allowance for loan losses	-70,007	-71,619	-75,223
Loans, net	4,717,682	4,600,500	4,280,485
Loans Receivable
Classifications of loans
Total loans	4,787,689	4,672,119	4,355,708
Less allowance for loan losses	-70,007	-71,619	-75,223
Loans, net	4,717,682	4,600,500	4,280,485
Loans Receivable | Owner occupied commercial real estate
Classifications of loans
Total loans	1,166,916	1,163,480	1,141,791
Loans Receivable | Income producing commercial real estate
Classifications of loans
Total loans	636,107	598,537	623,830
Loans Receivable | Commercial & industrial
Classifications of loans
Total loans	716,281	710,256	495,178
Loans Receivable | Commercial construction
Classifications of loans
Total loans	229,920	196,030	148,454
Loans Receivable | Commercial
Classifications of loans
Total loans	2,749,224	2,668,303	2,409,253
Loans Receivable | Residential mortgage
Classifications of loans
Total loans	863,311	865,789	866,615
Loans Receivable | Home equity lines of credit
Classifications of loans
Total loans	465,474	465,872	446,705
Loans Receivable | Residential construction
Classifications of loans
Total loans	291,259	298,627	317,749
Loans Receivable | Consumer installment
Classifications of loans
Total loans	102,585	104,899	106,991
Loans Receivable | Indirect auto
Classifications of loans
Total loans	$315,836	$268,629	$208,395

Loans_and_Allowance_for_Loan_L3

Loans and Allowance for Loan Losses - Balance and activity in allowance for loan losses by portfolio segment and recorded investment in loans by portfolio segment (Details 1) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	$73,549	$78,927
Charge-Offs	-3,352	-5,176
Recoveries	790	1,137
Allocation of Unallocated
Provision	1,800	2,500
Ending Balance	72,787	77,388
Loans Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	71,619	76,762
Charge-Offs	-3,352	-5,176
Recoveries	790	1,137
Allocation of Unallocated
Provision	950	2,500
Ending Balance	70,007	75,223
Loans Receivable | Owner occupied commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	16,041	17,164
Charge-Offs	-368	-341
Recoveries	11	89
Allocation of Unallocated		1,278
Provision	-732	5,166
Ending Balance	14,952	23,356
Loans Receivable | Income producing commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	10,296	7,174
Charge-Offs	-248	-231
Recoveries	7
Allocation of Unallocated		688
Provision	-400	231
Ending Balance	9,655	7,862
Loans Receivable | Commercial & industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	3,255	6,527
Charge-Offs	-469	-963
Recoveries	128	541
Allocation of Unallocated		318
Provision	528	-2,176
Ending Balance	3,442	4,247
Loans Receivable | Commercial construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,747	3,669
Charge-Offs	-22
Recoveries
Allocation of Unallocated		388
Provision	610	-80
Ending Balance	5,335	3,977
Loans Receivable | Residential mortgage
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	20,311	15,446
Charge-Offs	-578	-1,581
Recoveries	162	66
Allocation of Unallocated		1,452
Provision	243	584
Ending Balance	20,138	15,967
Loans Receivable | Home equity lines of credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	4,574	5,528
Charge-Offs	-73	-1,003
Recoveries	14	10
Allocation of Unallocated		391
Provision	-194	1,194
Ending Balance	4,321	6,120
Loans Receivable | Residential construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	10,603	12,532
Charge-Offs	-1,140	-304
Recoveries	79	93
Allocation of Unallocated		1,728
Provision	668	-1,868
Ending Balance	10,210	12,181
Loans Receivable | Consumer installment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	731	1,353
Charge-Offs	-326	-676
Recoveries	376	327
Allocation of Unallocated
Provision	-68	-287
Ending Balance	713	717
Loans Receivable | Indirect auto
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,061	1,126
Charge-Offs	-128	-77
Recoveries	13	11
Allocation of Unallocated
Provision	295	-264
Ending Balance	1,241	796
Loans Receivable | Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance		6,243
Charge-Offs
Recoveries
Allocation of Unallocated		-6,243
Provision
Ending Balance
Loans Receivable | Allowance for unfunded commitments
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Balance	1,930	2,165
Charge-Offs
Recoveries
Allocation of Unallocated
Provision	850
Ending Balance	$2,780	$2,165

Loans_and_Allowance_for_Loan_L4

Loans and Allowance for Loan Losses - Recorded investment in loans by portfolio segment and the balance of the allowance for loan losses (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	$7,594	$9,882	$8,399
Allowance for Loan Losses,Collectively evaluated for impairment	65,193	63,667	68,989
Allowance for Loan Losses, Ending balance	72,787	73,549	77,388	78,927
Loans Outstanding, Ending Balance	4,787,689	4,672,119	4,355,708
Loans Receivable
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	7,594	9,882	8,399
Allowance for Loan Losses,Collectively evaluated for impairment	62,413	61,737	66,824
Allowance for Loan Losses, Ending balance	70,007	71,619	75,223	76,762
Loans Outstanding, Individually evaluated for impairment	106,906	106,472	105,120
Loans Outstanding, Collectively evaluated for impairment	4,680,783	4,565,647	4,250,588
Loans Outstanding, Ending Balance	4,787,689	4,672,119	4,355,708
Loans Receivable | Owner occupied commercial real estate
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	1,758	2,737	855
Allowance for Loan Losses,Collectively evaluated for impairment	13,194	13,304	22,501
Allowance for Loan Losses, Ending balance	14,952	16,041	23,356	17,164
Loans Outstanding, Individually evaluated for impairment	36,835	34,654	29,051
Loans Outstanding, Collectively evaluated for impairment	1,130,081	1,128,826	1,112,740
Loans Outstanding, Ending Balance	1,166,916	1,163,480	1,141,791
Loans Receivable | Income producing commercial real estate
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	866	1,917	2,404
Allowance for Loan Losses,Collectively evaluated for impairment	8,789	8,379	5,458
Allowance for Loan Losses, Ending balance	9,655	10,296	7,862	7,174
Loans Outstanding, Individually evaluated for impairment	21,285	24,484	25,955
Loans Outstanding, Collectively evaluated for impairment	614,822	574,053	597,875
Loans Outstanding, Ending Balance	636,107	598,537	623,830
Loans Receivable | Commercial & industrial
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	8	15	253
Allowance for Loan Losses,Collectively evaluated for impairment	3,434	3,240	3,994
Allowance for Loan Losses, Ending balance	3,442	3,255	4,247	6,527
Loans Outstanding, Individually evaluated for impairment	3,977	3,977	4,167
Loans Outstanding, Collectively evaluated for impairment	712,304	706,279	491,011
Loans Outstanding, Ending Balance	716,281	710,256	495,178
Loans Receivable | Commercial construction
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	598	729	469
Allowance for Loan Losses,Collectively evaluated for impairment	4,737	4,018	3,508
Allowance for Loan Losses, Ending balance	5,335	4,747	3,977	3,669
Loans Outstanding, Individually evaluated for impairment	12,222	12,321	11,390
Loans Outstanding, Collectively evaluated for impairment	217,698	183,709	137,064
Loans Outstanding, Ending Balance	229,920	196,030	148,454
Loans Receivable | Residential mortgage
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	3,174	3,227	3,079
Allowance for Loan Losses,Collectively evaluated for impairment	16,964	17,084	12,888
Allowance for Loan Losses, Ending balance	20,138	20,311	15,967	15,446
Loans Outstanding, Individually evaluated for impairment	21,934	18,775	21,303
Loans Outstanding, Collectively evaluated for impairment	841,377	847,014	845,312
Loans Outstanding, Ending Balance	863,311	865,789	866,615
Loans Receivable | Home equity lines of credit
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	29	47	67
Allowance for Loan Losses,Collectively evaluated for impairment	4,292	4,527	6,053
Allowance for Loan Losses, Ending balance	4,321	4,574	6,120	5,528
Loans Outstanding, Individually evaluated for impairment	478	478	505
Loans Outstanding, Collectively evaluated for impairment	464,996	465,394	446,200
Loans Outstanding, Ending Balance	465,474	465,872	446,705
Loans Receivable | Residential construction
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	1,152	1,192	1,253
Allowance for Loan Losses,Collectively evaluated for impairment	9,058	9,411	10,928
Allowance for Loan Losses, Ending balance	10,210	10,603	12,181	12,532
Loans Outstanding, Individually evaluated for impairment	10,027	11,604	12,409
Loans Outstanding, Collectively evaluated for impairment	281,232	287,023	305,340
Loans Outstanding, Ending Balance	291,259	298,627	317,749
Loans Receivable | Consumer installment
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment	9	18	19
Allowance for Loan Losses,Collectively evaluated for impairment	704	713	698
Allowance for Loan Losses, Ending balance	713	731	717	1,353
Loans Outstanding, Individually evaluated for impairment	148	179	340
Loans Outstanding, Collectively evaluated for impairment	102,437	104,720	106,651
Loans Outstanding, Ending Balance	102,585	104,899	106,991
Loans Receivable | Indirect auto
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment
Allowance for Loan Losses,Collectively evaluated for impairment	1,241	1,061	796
Allowance for Loan Losses, Ending balance	1,241	1,061	796	1,126
Loans Outstanding, Individually evaluated for impairment
Loans Outstanding, Collectively evaluated for impairment	315,836	268,629	208,395
Loans Outstanding, Ending Balance	315,836	268,629	208,395
Loans Receivable | Allowance for unfunded commitments
Financing Receivable, Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment
Allowance for Loan Losses,Collectively evaluated for impairment	2,780	1,930	2,165
Allowance for Loan Losses, Ending balance	$2,780	$1,930	$2,165	$2,165

Loans_and_Allowance_for_Loan_L5

Loans and Allowance for Loan Losses - Loans individually evaluated for impairment by class of loans (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Loans individually evaluated for impairment by class of loans
Allowance for loan losses, Individually evaluated for impairment	$7,594	$9,882	$8,399
Loans Receivable
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	33,950	28,922	41,371
Recorded Investment, With no related allowance recorded	29,942	25,488	30,711
Unpaid Principal Balance, With an allowance recorded	82,211	83,768	79,222
Recorded Investment, With allowance recorded	76,964	80,984	74,409
Unpaid Principal Balance	116,161	112,690	120,593
Recorded Investment	106,906	106,472	105,120
Allowance for loan losses allocated with allowance	7,594	9,882	8,399
Allowance for loan losses, Individually evaluated for impairment	7,594	9,882	8,399
Loans Receivable | Owner occupied commercial real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	17,214	12,025	18,141
Recorded Investment, With no related allowance recorded	15,968	11,325	14,034
Unpaid Principal Balance, With an allowance recorded	22,494	24,728	15,157
Recorded Investment, With allowance recorded	20,867	23,329	17,072
Allowance for loan losses allocated with allowance	1,758	2,737	855
Allowance for loan losses, Individually evaluated for impairment	1,758	2,737	855
Loans Receivable | Income producing commercial real estate
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	8,645	8,311	6,575
Recorded Investment, With no related allowance recorded	8,502	8,311	3,816
Unpaid Principal Balance, With an allowance recorded	12,789	16,352	24,220
Recorded Investment, With allowance recorded	12,783	16,173	20,084
Allowance for loan losses allocated with allowance	866	1,917	2,404
Allowance for loan losses, Individually evaluated for impairment	866	1,917	2,404
Loans Receivable | Commercial & industrial
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	1,677	1,679	2,417
Recorded Investment, With no related allowance recorded	1,040	1,042	1,851
Unpaid Principal Balance, With an allowance recorded	2,945	2,936	2,598
Recorded Investment, With allowance recorded	2,937	2,935	2,316
Allowance for loan losses allocated with allowance	8	15	253
Allowance for loan losses, Individually evaluated for impairment	8	15	253
Loans Receivable | Commercial construction
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded			390
Recorded Investment, With no related allowance recorded			390
Unpaid Principal Balance, With an allowance recorded	12,302	12,401	11,079
Recorded Investment, With allowance recorded	12,222	12,321	11,000
Allowance for loan losses allocated with allowance	598	729	469
Allowance for loan losses, Individually evaluated for impairment	598	729	469
Loans Receivable | Commercial
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	27,536	22,015	27,523
Recorded Investment, With no related allowance recorded	25,510	20,678	20,091
Unpaid Principal Balance, With an allowance recorded	50,530	56,417	53,054
Recorded Investment, With allowance recorded	48,809	54,758	50,472
Allowance for loan losses allocated with allowance	3,230	5,398	3,981
Loans Receivable | Residential mortgage
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	3,411	2,569	7,292
Recorded Investment, With no related allowance recorded	1,793	1,472	5,364
Unpaid Principal Balance, With an allowance recorded	21,872	17,732	16,688
Recorded Investment, With allowance recorded	20,141	17,303	15,939
Allowance for loan losses allocated with allowance	3,174	3,227	3,079
Allowance for loan losses, Individually evaluated for impairment	3,174	3,227	3,079
Loans Receivable | Home equity lines of credit
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded
Recorded Investment, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded	478	478	505
Recorded Investment, With allowance recorded	478	478	505
Allowance for loan losses allocated with allowance	29	47	67
Allowance for loan losses, Individually evaluated for impairment	29	47	67
Loans Receivable | Residential construction
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded	3,003	4,338	6,474
Recorded Investment, With no related allowance recorded	2,639	3,338	5,174
Unpaid Principal Balance, With an allowance recorded	9,180	8,962	8,615
Recorded Investment, With allowance recorded	7,388	8,266	7,235
Allowance for loan losses allocated with allowance	1,152	1,192	1,253
Allowance for loan losses, Individually evaluated for impairment	1,152	1,192	1,253
Loans Receivable | Consumer installment
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded			82
Recorded Investment, With no related allowance recorded			82
Unpaid Principal Balance, With an allowance recorded	151	179	360
Recorded Investment, With allowance recorded	148	179	258
Allowance for loan losses allocated with allowance	9	18	19
Allowance for loan losses, Individually evaluated for impairment	9	18	19
Loans Receivable | Indirect auto
Loans individually evaluated for impairment by class of loans
Unpaid Principal Balance, With no related allowance recorded
Recorded Investment, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded
Recorded Investment, With allowance recorded
Allowance for loan losses allocated with allowance
Allowance for loan losses, Individually evaluated for impairment

Loans_and_Allowance_for_Loan_L6

Loans and Allowance for Loan Losses - Average balances of impaired loans and income recognized on impaired loans (Details 4) (Loans Receivable, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Average balances of impaired loans and income recognized on impaired loans
Average Balance	$108,000	$107,554
Interest Revenue Recognized During Impairment	1,235	1,220
Cash Basis Interest Revenue Received	1,259	1,302
Owner occupied commercial real estate
Average balances of impaired loans and income recognized on impaired loans
Average Balance	36,989	29,109
Interest Revenue Recognized During Impairment	460	358
Cash Basis Interest Revenue Received	459	380
Income producing commercial real estate
Average balances of impaired loans and income recognized on impaired loans
Average Balance	21,424	25,860
Interest Revenue Recognized During Impairment	267	312
Cash Basis Interest Revenue Received	275	333
Commercial & industrial
Average balances of impaired loans and income recognized on impaired loans
Average Balance	4,023	4,560
Interest Revenue Recognized During Impairment	38	53
Cash Basis Interest Revenue Received	37	51
Commercial construction
Average balances of impaired loans and income recognized on impaired loans
Average Balance	12,273	12,714
Interest Revenue Recognized During Impairment	116	112
Cash Basis Interest Revenue Received	121	135
Commercial
Average balances of impaired loans and income recognized on impaired loans
Average Balance	74,709	72,243
Interest Revenue Recognized During Impairment	881	835
Cash Basis Interest Revenue Received	892	899
Residential mortgage
Average balances of impaired loans and income recognized on impaired loans
Average Balance	22,085	21,321
Interest Revenue Recognized During Impairment	226	229
Cash Basis Interest Revenue Received	233	238
Home equity lines of credit
Average balances of impaired loans and income recognized on impaired loans
Average Balance	478	505
Interest Revenue Recognized During Impairment	5	5
Cash Basis Interest Revenue Received	5	6
Residential construction
Average balances of impaired loans and income recognized on impaired loans
Average Balance	10,575	13,037
Interest Revenue Recognized During Impairment	120	145
Cash Basis Interest Revenue Received	126	150
Consumer installment
Average balances of impaired loans and income recognized on impaired loans
Average Balance	153	448
Interest Revenue Recognized During Impairment	3	6
Cash Basis Interest Revenue Received	3	9
Indirect auto
Average balances of impaired loans and income recognized on impaired loans
Average Balance
Interest Revenue Recognized During Impairment
Cash Basis Interest Revenue Received

Loans_and_Allowance_for_Loan_L7

Loans and Allowance for Loan Losses - Recorded investment in nonaccrual loans by loan class (Details 5) (Loans Receivable, USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	$19,015	$17,881	$25,250
Owner occupied commercial real estate
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	4,360	4,133	3,868
Income producing commercial real estate
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	835	717	1,278
Commercial & industrial
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	1,629	1,571	822
Commercial construction
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	60	83	479
Commercial
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	6,884	6,504	6,447
Residential mortgage
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	8,669	8,196	13,307
Home equity lines of credit
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	693	695	1,106
Residential construction
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	2,127	2,006	3,805
Consumer installment
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	142	134	291
Indirect auto
Recorded investment in nonaccrual loans by loan class
Nonaccrual Loans	$500	$346	$294

Loans_and_Allowance_for_Loan_L8

Loans and Allowance for Loan Losses - Aging of recorded investment in past due loans (Details 6) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Aging of the recorded investment in past due loans
Loans Outstanding, Ending Balance	$4,787,689	$4,672,119	$4,355,708
Loans Receivable
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	10,341	12,242	15,320
Loans Past Due, 60 - 89 Days	5,996	6,925	6,498
Loans Past Due, > 90 Days	6,633	7,646	9,107
Loans, Total Past Due	22,970	26,813	30,925
Loans Not Past Due	4,764,719	4,645,306	4,324,783
Loans Outstanding, Ending Balance	4,787,689	4,672,119	4,355,708
Loans Receivable | Owner occupied commercial real estate
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	1,965	1,444	1,265
Loans Past Due, 60 - 89 Days	1,130	1,929	187
Loans Past Due, > 90 Days	1,573	1,141	1,276
Loans, Total Past Due	4,668	4,514	2,728
Loans Not Past Due	1,162,248	1,158,966	1,139,063
Loans Outstanding, Ending Balance	1,166,916	1,163,480	1,141,791
Loans Receivable | Income producing commercial real estate
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	62	2,322	1,045
Loans Past Due, 60 - 89 Days		1,172	1,259
Loans Past Due, > 90 Days	440		589
Loans, Total Past Due	502	3,494	2,893
Loans Not Past Due	635,605	595,043	620,937
Loans Outstanding, Ending Balance	636,107	598,537	623,830
Loans Receivable | Commercial & industrial
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	790	302	1,468
Loans Past Due, 60 - 89 Days	1,001	40	231
Loans Past Due, > 90 Days	1,405	1,425	589
Loans, Total Past Due	3,196	1,767	2,288
Loans Not Past Due	713,085	708,489	492,890
Loans Outstanding, Ending Balance	716,281	710,256	495,178
Loans Receivable | Commercial construction
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days			313
Loans Past Due, 60 - 89 Days			46
Loans Past Due, > 90 Days	44	66	366
Loans, Total Past Due	44	66	725
Loans Not Past Due	229,876	195,964	147,729
Loans Outstanding, Ending Balance	229,920	196,030	148,454
Loans Receivable | Commercial
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	2,817	4,068	4,091
Loans Past Due, 60 - 89 Days	2,131	3,141	1,723
Loans Past Due, > 90 Days	3,462	2,632	2,820
Loans, Total Past Due	8,410	9,841	8,634
Loans Not Past Due	2,740,814	2,658,462	2,400,619
Loans Outstanding, Ending Balance	2,749,224	2,668,303	2,409,253
Loans Receivable | Residential mortgage
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	4,290	5,234	7,295
Loans Past Due, 60 - 89 Days	1,566	2,931	3,520
Loans Past Due, > 90 Days	2,558	3,278	4,806
Loans, Total Past Due	8,414	11,443	15,621
Loans Not Past Due	854,897	854,346	850,994
Loans Outstanding, Ending Balance	863,311	865,789	866,615
Loans Receivable | Home equity lines of credit
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	1,470	961	1,554
Loans Past Due, 60 - 89 Days	762	303	551
Loans Past Due, > 90 Days	86	167	502
Loans, Total Past Due	2,318	1,431	2,607
Loans Not Past Due	463,156	464,441	444,098
Loans Outstanding, Ending Balance	465,474	465,872	446,705
Loans Receivable | Residential construction
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	1,018	1,172	1,440
Loans Past Due, 60 - 89 Days	1,343	268	30
Loans Past Due, > 90 Days	245	1,395	782
Loans, Total Past Due	2,606	2,835	2,252
Loans Not Past Due	288,653	295,792	315,497
Loans Outstanding, Ending Balance	291,259	298,627	317,749
Loans Receivable | Consumer installment
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	485	607	677
Loans Past Due, 60 - 89 Days	61	136	495
Loans Past Due, > 90 Days	80	33	60
Loans, Total Past Due	626	776	1,232
Loans Not Past Due	101,959	104,123	105,759
Loans Outstanding, Ending Balance	102,585	104,899	106,991
Loans Receivable | Indirect auto
Aging of the recorded investment in past due loans
Loans Past Due, 30 - 59 Days	261	200	263
Loans Past Due, 60 - 89 Days	133	146	179
Loans Past Due, > 90 Days	202	141	137
Loans, Total Past Due	596	487	579
Loans Not Past Due	315,240	268,142	207,816
Loans Outstanding, Ending Balance	$315,836	$268,629	$208,395

Loans_and_Allowance_for_Loan_L9

Loans and Allowance for Loan Losses - TDRs and pre and post-modification recorded investment (Details 7) (Loans Receivable, USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Contract	Contract	Contract
Additional information on troubled debt restructurings
Number of Contracts	354	352	356
Pre-Modification Outstanding Recorded Investment	$90,088	$88,246	$92,892
Post-Modification Outstanding Recorded Investment	86,430	85,096	85,869
Owner occupied commercial real estate
Additional information on troubled debt restructurings
Number of Contracts	52	54	46
Pre-Modification Outstanding Recorded Investment	30,600	27,695	24,194
Post-Modification Outstanding Recorded Investment	29,201	26,296	22,471
Income producing commercial real estate
Additional information on troubled debt restructurings
Number of Contracts	28	31	32
Pre-Modification Outstanding Recorded Investment	14,525	18,094	20,936
Post-Modification Outstanding Recorded Investment	14,525	17,915	18,488
Commercial & industrial
Additional information on troubled debt restructurings
Number of Contracts	32	32	35
Pre-Modification Outstanding Recorded Investment	2,902	2,848	3,574
Post-Modification Outstanding Recorded Investment	2,902	2,847	3,292
Commercial construction
Additional information on troubled debt restructurings
Number of Contracts	14	14	14
Pre-Modification Outstanding Recorded Investment	11,268	11,360	11,678
Post-Modification Outstanding Recorded Investment	11,188	11,280	11,598
Commercial
Additional information on troubled debt restructurings
Number of Contracts	126	131	127
Pre-Modification Outstanding Recorded Investment	59,295	59,997	60,382
Post-Modification Outstanding Recorded Investment	57,816	58,338	55,849
Residential mortgage
Additional information on troubled debt restructurings
Number of Contracts	162	154	148
Pre-Modification Outstanding Recorded Investment	21,343	18,630	21,163
Post-Modification Outstanding Recorded Investment	20,600	17,836	19,657
Home equity lines of credit
Additional information on troubled debt restructurings
Number of Contracts	2	2	3
Pre-Modification Outstanding Recorded Investment	478	478	505
Post-Modification Outstanding Recorded Investment	478	478	505
Residential construction
Additional information on troubled debt restructurings
Number of Contracts	47	48	52
Pre-Modification Outstanding Recorded Investment	8,824	8,962	10,400
Post-Modification Outstanding Recorded Investment	7,388	8,265	9,518
Consumer installment
Additional information on troubled debt restructurings
Number of Contracts	17	17	26
Pre-Modification Outstanding Recorded Investment	148	179	442
Post-Modification Outstanding Recorded Investment	148	179	340
Indirect auto
Additional information on troubled debt restructurings
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment

Recovered_Sheet1

Loans and Allowance for Loan Losses - Loans modified under terms of TDR (Details 8) (Loans Receivable, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	Contract	Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	22	22
Pre-Modification Outstanding Recorded Investment	$6,541	$2,867
Post Modification Outstanding Recorded Investment	6,541	2,867
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts	1	7
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment	30	610
Owner occupied commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	2
Pre-Modification Outstanding Recorded Investment	4,497	605
Post Modification Outstanding Recorded Investment	4,497	605
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts		1
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment		104
Income producing commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	2
Pre-Modification Outstanding Recorded Investment	255	533
Post Modification Outstanding Recorded Investment	255	533
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment
Commercial & industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	1
Pre-Modification Outstanding Recorded Investment	188	224
Post Modification Outstanding Recorded Investment	188	224
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts		2
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment		54
Commercial construction
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Pre-Modification Outstanding Recorded Investment		231
Post Modification Outstanding Recorded Investment		231
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment
Commercial
Financing Receivable, Modifications [Line Items]
Number of Contracts	6	6
Pre-Modification Outstanding Recorded Investment	4,940	1,593
Post Modification Outstanding Recorded Investment	4,940	1,593
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts		3
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment		158
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Contracts	15	14
Pre-Modification Outstanding Recorded Investment	1,598	1,132
Post Modification Outstanding Recorded Investment	1,598	1,132
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts		4
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment		452
Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post Modification Outstanding Recorded Investment
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment
Residential construction
Financing Receivable, Modifications [Line Items]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post Modification Outstanding Recorded Investment
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment
Consumer installment
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	2
Pre-Modification Outstanding Recorded Investment	3	142
Post Modification Outstanding Recorded Investment	3	142
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts	1
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment	30
Indirect auto
Financing Receivable, Modifications [Line Items]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post Modification Outstanding Recorded Investment
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts
Troubled Debt Restructurings Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Recorded Investment

Recovered_Sheet2

Loans and Allowance for Loan Losses - Risk category of loans by class of loans (Details 9) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Risk category of loans by class of loans
Total loans	$4,787,689	$4,672,119	$4,355,708
Loans Receivable
Risk category of loans by class of loans
Total loans	4,787,689	4,672,119	4,355,708
Loans Receivable | Pass
Risk category of loans by class of loans
Total loans	4,589,476	4,466,798	4,098,137
Loans Receivable | Watch
Risk category of loans by class of loans
Total loans	57,481	59,047	67,456
Loans Receivable | Substandard Performing
Risk category of loans by class of loans
Total loans	121,717	128,393	164,865
Loans Receivable | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	19,015	17,881	25,250
Loans Receivable | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Owner occupied commercial real estate
Risk category of loans by class of loans
Total loans	1,166,916	1,163,480	1,141,791
Loans Receivable | Owner occupied commercial real estate | Pass
Risk category of loans by class of loans
Total loans	1,097,075	1,094,057	1,059,528
Loans Receivable | Owner occupied commercial real estate | Watch
Risk category of loans by class of loans
Total loans	21,594	18,889	30,869
Loans Receivable | Owner occupied commercial real estate | Substandard Performing
Risk category of loans by class of loans
Total loans	43,887	46,401	47,525
Loans Receivable | Owner occupied commercial real estate | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	4,360	4,133	3,868
Loans Receivable | Owner occupied commercial real estate | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Income producing commercial real estate
Risk category of loans by class of loans
Total loans	636,107	598,537	623,830
Loans Receivable | Income producing commercial real estate | Pass
Risk category of loans by class of loans
Total loans	600,976	560,559	577,771
Loans Receivable | Income producing commercial real estate | Watch
Risk category of loans by class of loans
Total loans	14,415	16,701	7,982
Loans Receivable | Income producing commercial real estate | Substandard Performing
Risk category of loans by class of loans
Total loans	19,881	20,560	36,800
Loans Receivable | Income producing commercial real estate | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	835	717	1,278
Loans Receivable | Income producing commercial real estate | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Commercial & industrial
Risk category of loans by class of loans
Total loans	716,281	710,256	495,178
Loans Receivable | Commercial & industrial | Pass
Risk category of loans by class of loans
Total loans	704,714	696,805	481,310
Loans Receivable | Commercial & industrial | Watch
Risk category of loans by class of loans
Total loans	3,234	4,017	4,905
Loans Receivable | Commercial & industrial | Substandard Performing
Risk category of loans by class of loans
Total loans	6,704	7,863	8,141
Loans Receivable | Commercial & industrial | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	1,629	1,571	822
Loans Receivable | Commercial & industrial | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Commercial construction
Risk category of loans by class of loans
Total loans	229,920	196,030	148,454
Loans Receivable | Commercial construction | Pass
Risk category of loans by class of loans
Total loans	223,810	190,070	138,560
Loans Receivable | Commercial construction | Watch
Risk category of loans by class of loans
Total loans	2,522	2,311	4,134
Loans Receivable | Commercial construction | Substandard Performing
Risk category of loans by class of loans
Total loans	3,528	3,566	5,281
Loans Receivable | Commercial construction | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	60	83	479
Loans Receivable | Commercial construction | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Commercial
Risk category of loans by class of loans
Total loans	2,749,224	2,668,303	2,409,253
Loans Receivable | Commercial | Pass
Risk category of loans by class of loans
Total loans	2,626,575	2,541,491	2,257,169
Loans Receivable | Commercial | Watch
Risk category of loans by class of loans
Total loans	41,765	41,918	47,890
Loans Receivable | Commercial | Substandard Performing
Risk category of loans by class of loans
Total loans	74,000	78,390	97,747
Loans Receivable | Commercial | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	6,884	6,504	6,447
Loans Receivable | Commercial | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Residential mortgage
Risk category of loans by class of loans
Total loans	863,311	865,789	866,615
Loans Receivable | Residential mortgage | Pass
Risk category of loans by class of loans
Total loans	813,075	814,168	799,145
Loans Receivable | Residential mortgage | Watch
Risk category of loans by class of loans
Total loans	11,185	11,594	10,591
Loans Receivable | Residential mortgage | Substandard Performing
Risk category of loans by class of loans
Total loans	30,382	31,831	43,572
Loans Receivable | Residential mortgage | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	8,669	8,196	13,307
Loans Receivable | Residential mortgage | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Home equity lines of credit
Risk category of loans by class of loans
Total loans	465,474	465,872	446,705
Loans Receivable | Home equity lines of credit | Pass
Risk category of loans by class of loans
Total loans	458,577	459,881	437,908
Loans Receivable | Home equity lines of credit | Watch
Risk category of loans by class of loans
Total loans	470		29
Loans Receivable | Home equity lines of credit | Substandard Performing
Risk category of loans by class of loans
Total loans	5,734	5,296	7,662
Loans Receivable | Home equity lines of credit | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	693	695	1,106
Loans Receivable | Home equity lines of credit | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Residential construction
Risk category of loans by class of loans
Total loans	291,259	298,627	317,749
Loans Receivable | Residential construction | Pass
Risk category of loans by class of loans
Total loans	275,567	280,166	292,032
Loans Receivable | Residential construction | Watch
Risk category of loans by class of loans
Total loans	4,061	5,535	8,935
Loans Receivable | Residential construction | Substandard Performing
Risk category of loans by class of loans
Total loans	9,504	10,920	12,977
Loans Receivable | Residential construction | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	2,127	2,006	3,805
Loans Receivable | Residential construction | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Consumer installment
Risk category of loans by class of loans
Total loans	102,585	104,899	106,991
Loans Receivable | Consumer installment | Pass
Risk category of loans by class of loans
Total loans	101,142	103,383	104,379
Loans Receivable | Consumer installment | Watch
Risk category of loans by class of loans
Total loans			11
Loans Receivable | Consumer installment | Substandard Performing
Risk category of loans by class of loans
Total loans	1,301	1,382	2,310
Loans Receivable | Consumer installment | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	142	134	291
Loans Receivable | Consumer installment | Doubtful / Loss
Risk category of loans by class of loans
Total loans
Loans Receivable | Indirect auto
Risk category of loans by class of loans
Total loans	315,836	268,629	208,395
Loans Receivable | Indirect auto | Pass
Risk category of loans by class of loans
Total loans	314,540	267,709	207,504
Loans Receivable | Indirect auto | Watch
Risk category of loans by class of loans
Total loans
Loans Receivable | Indirect auto | Substandard Performing
Risk category of loans by class of loans
Total loans	796	574	597
Loans Receivable | Indirect auto | Substandard Nonaccrual
Risk category of loans by class of loans
Total loans	500	346	294
Loans Receivable | Indirect auto | Doubtful / Loss
Risk category of loans by class of loans
Total loans

Recovered_Sheet3

Loans and Allowance for Loan Losses (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Criteria amount for evaluation of impairment	$500,000
Accruing substandard relationship	2,000,000
Percentage of appraised value of underlying collateral in nonaccrual status	80.00%
Gross additional interest income that would have been earned if the nonaccrual loans had performed as per original terms	260,000	460,000
Specific reserves	7,120,000	8,250,000	9,720,000
Loans outstanding classified as troubled debt restructurings	36,000	12,000	51,000
FHLB
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged as collateral to secure FHLB advances	$2,280,000,000	$2,070,000,000	$2,350,000,000

SBA_Servicing_Rights_Changes_i

SBA Servicing Rights - Changes in the balances of servicing assets and servicing liabilities subsequently measured using fair value measurement method (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
ASC 860 Servicing Asset Rollforward
Fair value as of January 1, 2015	$2,551
Additions:
Originated servicing rights capitalized upon sale of loans	190
Subtractions:
Disposals
Changes in fair value:
Due to change in valuation inputs or assumptions used in the valuation model	-24
Fair value as of March 31, 2015	$2,717

SBA_Servicing_Rights_Economic_

SBA Servicing Rights - Economic assumptions of SBA Servicing Asset (Details 1) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Servicing Assets at Fair Value [Line Items]
Fair value of retained Servicing Assets	$2,717	$2,551
Prepayment rate assumption	7.26%	6.70%
10% adverse change	-75	-62
20% adverse change	-146	-122
Discount rate	11.10%	12.00%
Weighted-average life (months)	7 years 1 month 6 days	6 years 6 months
Weighted-average gross margin	2.13%	2.00%
100 bps adverse change
Servicing Assets at Fair Value [Line Items]
Adverse change	-101	-85
200bps adverse change
Servicing Assets at Fair Value [Line Items]
Adverse change	($196)	($164)

Reclassifications_Out_of_Accum2

Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	$1,539	$217
Time deposit interest expense	-1,109	-1,771
Money market deposit interest expense	673	563
Tax benefit (expense)	10,393	9,038
Net of tax	17,670	14,961
Reclassifications Out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	282	-197
Reclassifications Out of Accumulated Other Comprehensive Income | Realized gains on sales of available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	1,539	217
Tax benefit (expense)	-598	-92
Net of tax	941	125
Reclassifications Out of Accumulated Other Comprehensive Income | Amortization of (losses) gains included in net income on available-for-sale securities transferred to held to maturity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities interest revenue	-484	-330
Tax benefit (expense)	182	123
Net of tax	-302	-207
Reclassifications Out of Accumulated Other Comprehensive Income | Gains included in net income on derivative financial instruments accounted for as cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Time deposit interest expense		-97
Deposits in banks and short-term investments interest revenue	-48
Money market deposit interest expense	-119
Federal Home Loan Bank advances interest expense	-258
Total before tax	-425	-97
Tax benefit (expense)	165	38
Net of tax	-260	-59
Reclassifications Out of Accumulated Other Comprehensive Income | Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	-159	-91
Tax benefit (expense)	62	35
Net of tax	-97	-56
Reclassifications Out of Accumulated Other Comprehensive Income | Amortization of prior service cost and actuarial losses included in net periodic pension cost for defined benefit pension plan | Salaries and employee benefits expense
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service cost	-91	-91
Actuarial losses	($68)

Earnings_Per_Share_Preferred_s

Earnings Per Share - Preferred stock dividends (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accrued dividends on preferred stock, including accretion of discounts
Total preferred stock dividends		$439
Series B - 5% fixed until December 6, 2013, 9% thereafter
Accrued dividends on preferred stock, including accretion of discounts
Total preferred stock dividends		159
Series D - LIBOR plus 9.6875%, resets quarterly
Accrued dividends on preferred stock, including accretion of discounts
Total preferred stock dividends		$280

Earnings_Per_Share_Computation

Earnings Per Share - Computation of basic and diluted earnings per share (Details 1) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Computation of basic and diluted loss per share
Net income available to common shareholders	$17,670	$14,961
Weighted average shares outstanding:
Basic	60,905	60,059
Effect of dilutive securities
Stock options	4	2
Diluted	60,909	60,061
Net income per common share:
Basic (in dollars per share)	$0.29	$0.25
Diluted (in dollars per share)	$0.29	$0.25

Earnings_Per_Share_Detail_Text

Earnings Per Share (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Class of Stock [Line Items]
Shares issuable upon the exercise of warrants	219,909	219,909
Exercise of price warrants	$61.40	$61.40
Fletcher International Ltd
Class of Stock [Line Items]
Shares issuable upon the exercise of warrants		1,411,765
Exercise of price warrants		$21.25
Employees
Class of Stock [Line Items]
Shares issuable upon exercise of grants	301,344	348,860
Weighted average exercise price of stock options granted to employees	$93.01	$98.02
Restricted Stock
Class of Stock [Line Items]
Vesting of restricted stock awards	773,304	1,100,000

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities - Derivatives accounted for as hedges under ASC 815 (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, asset derivatives, fair value	$5		$5,626
Derivatives accounted for as hedges, liability derivatives, fair value	3,797	6,167	21,176
Other assets | Cash flow hedging | Money Market Deposits
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, asset derivatives, fair value			2,971
Other assets | Fair value hedging | Brokered CD's
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, asset derivatives, fair value	5
Other assets | Fair value hedging | Corporate Bonds
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, asset derivatives, fair value			2,655
Other liabilities | Cash flow hedging | Short-Term Debt
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, liability derivatives, fair value			3,650
Other liabilities | Cash flow hedging | Money Market Deposits
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, liability derivatives, fair value		350	678
Other liabilities | Fair value hedging | AFS security
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, liability derivatives, fair value	345
Other liabilities | Fair value hedging | Brokered CD's
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, liability derivatives, fair value	3,452	5,817	14,119
Other liabilities | Fair value hedging | Corporate Bonds
Derivatives, Fair Value [Line Items]
Derivatives accounted for as hedges, liability derivatives, fair value			$2,729

Derivatives_and_Hedging_Activi3

Derivatives and Hedging Activities - Derivatives not designated as hedging instruments under ASC 815 (Details 1) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, assets at fair value	$20,286	$20,599	$15,937
Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value	25,479	25,830	21,133
Other assets | Customer swap positions
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, assets at fair value	5,043	3,433	1,359
Other assets | Dealer offsets to customer swap positions
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, assets at fair value		128	825
Other assets | Bifurcated embedded derivatives
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, assets at fair value	8,117	12,262	13,753
Other assets | Offsetting positions for de-designated cash flow hedges
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, assets at fair value	7,126	4,776
Other liabilities | Customer swap positions
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value		129	825
Other liabilities | Dealer offsets to customer swap positions
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value	5,107	3,456	1,377
Other liabilities | Dealer offsets to bifurcated embedded derivatives
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value	13,244	17,467	18,931
Other liabilities | De-designated cash flow hedges
Derivatives, Fair Value [Line Items]
Interest rate derivative instruments not designated as hedging instruments, liabilities at fair value	$7,128	$4,778

Derivatives_and_Hedging_Activi4

Derivatives and Hedging Activities - Derivatives in Fair Value Hedging Relationships (Details 2) (Fair value hedging, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Effect of fair value hedging derivative financial instruments on the consolidated statement of operations
Amount of Gain (Loss) Recognized in Income on Derivative	$2,025	$4,149
Amount of Gain (Loss) Recognized in Income on Hedged Item	-2,062	-4,538
Interest expense | Brokered CD's
Effect of fair value hedging derivative financial instruments on the consolidated statement of operations
Amount of Gain (Loss) Recognized in Income on Derivative	2,370	5,853
Amount of Gain (Loss) Recognized in Income on Hedged Item	-2,405	-6,034
Interest revenue | Corporate Bonds
Effect of fair value hedging derivative financial instruments on the consolidated statement of operations
Amount of Gain (Loss) Recognized in Income on Derivative	-345	-1,704
Amount of Gain (Loss) Recognized in Income on Hedged Item	$343	$1,496

Derivatives_and_Hedging_Activi5

Derivatives and Hedging Activities - Derivatives in Cash Flow Hedging Relationships (Details 3) (Cash flow hedging, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	($471)	($2,833)
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income (Effective Portion)	-425	-97
Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	($7)	($35)

Derivatives_and_Hedging_Activi6

Derivatives and Hedging Activities (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Recognized net gain (loss) related to ineffectiveness of hedging relationships	$37,000	$389,000
Net reduction of interest expense/revenue	1,140,000	1,210,000
Credit risk
Derivative Instruments, Gain (Loss) [Line Items]
Collateral pledged toward derivatives	31,400,000
Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative contracts outstanding	1
Total notional amount designated as cash flow hedges	175,000,000
Cash flow hedging | Offsetting positions for de-designated cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total notional amount designated as cash flow hedges			500,000,000	500,000,000
Cash flow hedging | Interest Rate Risk
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative contracts outstanding	3	3	1
Recognized net gain (loss) related to ineffectiveness of hedging relationships	7,000	35,000
Increase to deposit interest expense over next twelve months	1,830,000
Total notional amount designated as cash flow hedges	375,000,000	200,000,000	175,000,000
Fair value hedging of interest rate risk | Corporate Bonds
Derivative Instruments, Gain (Loss) [Line Items]
Net reduction of interest expense/revenue	74,000	530,000
Fair value hedging of interest rate risk | Interest Rate Risk
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative contracts outstanding	16	24	1
Derivative instruments outstanding		8
Remaining number of derivative held		16
Aggregate notional amount designated as fair value hedges of interest rate risk		86,000,000
Total notional amount designated as cash flow hedges	$197,000,000	$285,000,000	$30,000,000

StockBased_Compensation_Stock_

Stock-Based Compensation - Stock option activity (Details) (Stock Options, USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015
Stock Options
Shares
Outstanding at December 31, 2014	313,555
Expired	-12,211
Outstanding at March 31, 2015	301,344
Outstanding at March 31, 2015	285,095
Weighted-Average Exercise Price
Outstanding at December 31, 2014	$93.40
Expired	$103.12
Outstanding at March 31, 2015	$93.01
Outstanding at March 31, 2015	$97.43
Weighted-Average Remaining Contractual Term (Years), Outstanding	2 years 8 months 12 days
Weighted-Average Remaining Contractual Term (Years), Exercisable	2 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding	$118
Aggregate Intrinsic Value, Exercisable	$63

StockBased_Compensation_Restri

Stock-Based Compensation - Restricted stock activity (Details 2) (Restricted Stock and Restricted Stock Unit, USD $)	3 Months Ended
	Mar. 31, 2015
Restricted Stock and Restricted Stock Unit
Shares
Outstanding at December 31, 2014	829,201
Granted	95,167
Exercised	-100,607
Cancelled	-50,457
Outstanding at March 31, 2015	773,304
Vested at March 31, 2015	7,580
Weighted-Average Grant-Date Fair Value
Outstanding at December 31, 2013	$14.76
Granted	$18.06
Exercised	$15.36
Cancelled	$15.09
Outstanding at March 31, 2015	$15.07
Vested at March 31, 2015	$9.90

StockBased_Compensation_Detail

Stock-Based Compensation (Detail textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional award granted under plan	405,000
Vesting period	4 years
Exercisable period	10 years
Total intrinsic value	$9,460,000
Recognition period for unrecognized compensation cost related	2 years 8 months 9 days
Aggregate grant date fair value	$1,550,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	10,000
Estimated forfeiture rate of award	3.00%
Restricted Stock and Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	956,000	1,100,000
Total intrinsic value	$14,600,000
Other operating expense for restricted stock units granted	$25,000	$25,000

Common_and_Preferred_Stock_Iss1

Common and Preferred Stock Issued / Common Stock Issuable (Detail Textual) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 25, 2014
Common And Preferred Stock Issued And Common Stock Issuable [Line Items]
Stock Issued During Period, Shares, New Issues		640,000
Stock Issued During Period, Value, New Issues		$12,206,000
Proceeds from Issuance of Common Stock		12,206,000
Shares issued in connection with DRIP	487
Shares purchased by United's 401(k) retirement plan	11,837
Amount of shares issued	209,000
Discount offered to employees under United has an Employee Stock Purchase Program (ESPP) to purchase shares of common stock	5.00%
Increased percentage of discount on purchases made through ESPP	10.00%
Stock issued during period shares employee stock pension plan	3,202	2,639
Common stock issuable shares under deferred compensation plan	400,369	237,763
Settlement Agreement | Fletcher International Ltd
Common And Preferred Stock Issued And Common Stock Issuable [Line Items]
Stock Issued During Period, Shares, New Issues			640,000
Stock Issued During Period, Value, New Issues			12,000,000
Proceeds from Issuance of Common Stock			$12,200,000

Income_Taxes_Detail_Textuals

Income Taxes (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$10,393,000	$9,038,000
Income tax effective tax rate	37.00%	37.00%
Valuation allowance on deferred tax assets	4,270,000	4,080,000	4,120,000
Valuation allowance related to specific state income tax credits	4,270,000
Net deferred tax asset realized based upon future taxable income	202,000,000
Unrecognized income tax benefits	$4,290,000	$4,590,000	$4,200,000

Assets_and_Liabilities_Measure2

Assets and Liabilities Measured at Fair Value - Assets and liabilities measured at fair value on recurring basis (Details) (Recurring, USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Level 1
Assets:
Total assets	$51,780	$109,573	$3,468
Liabilities:
Total liabilities	3,366	3,864	3,468
Level 1 | U.S. Treasury securities
Assets:
Total assets	48,414	105,709
Level 1 | U.S. Government agencies
Assets:
Total assets
Level 1 | State and political subdivisions
Assets:
Total assets
Level 1 | Mortgage-backed securities
Assets:
Total assets
Level 1 | Corporate bonds
Assets:
Total assets
Level 1 | Asset-backed securities
Assets:
Total assets
Level 1 | Other
Assets:
Total assets
Level 1 | Deferred compensation plan assets
Assets:
Total assets	3,366	3,864	3,468
Level 1 | SBA servicing rights
Assets:
Total assets
Level 1 | Derivative financial instruments
Assets:
Total assets
Level 1 | Deferred compensation plan liability
Liabilities:
Total liabilities	3,366	3,864	3,468
Level 1 | Brokered certificates of deposit
Liabilities:
Total liabilities
Level 1 | Derivative financial instruments
Liabilities:
Total liabilities
Level 2
Assets:
Total assets	1,764,983	1,684,612	1,858,889
Liabilities:
Total liabilities	14,747	13,018	220,035
Level 2 | U.S. Treasury securities
Assets:
Total assets
Level 2 | U.S. Government agencies
Assets:
Total assets	37,268	36,299
Level 2 | State and political subdivisions
Assets:
Total assets	16,352	20,233	23,006
Level 2 | Mortgage-backed securities
Assets:
Total assets	1,041,114	996,820	1,128,112
Level 2 | Corporate bonds
Assets:
Total assets	186,957	164,878	251,574
Level 2 | Asset-backed securities
Assets:
Total assets	468,728	455,928	432,062
Level 2 | Other
Assets:
Total assets	2,390	2,117	2,572
Level 2 | Deferred compensation plan assets
Assets:
Total assets
Level 2 | SBA servicing rights
Assets:
Total assets
Level 2 | Derivative financial instruments
Assets:
Total assets	12,174	8,337	21,563
Level 2 | Deferred compensation plan liability
Liabilities:
Total liabilities
Level 2 | Brokered certificates of deposit
Liabilities:
Total liabilities			177,726
Level 2 | Derivative financial instruments
Liabilities:
Total liabilities	14,747	13,018	42,309
Level 3
Assets:
Total assets	11,584	15,563	350
Liabilities:
Total liabilities	14,529	18,979
Level 3 | U.S. Treasury securities
Assets:
Total assets
Level 3 | U.S. Government agencies
Assets:
Total assets
Level 3 | State and political subdivisions
Assets:
Total assets
Level 3 | Mortgage-backed securities
Assets:
Total assets
Level 3 | Corporate bonds
Assets:
Total assets	750	750	350
Level 3 | Asset-backed securities
Assets:
Total assets
Level 3 | Other
Assets:
Total assets
Level 3 | Deferred compensation plan assets
Assets:
Total assets
Level 3 | SBA servicing rights
Assets:
Total assets	2,717	2,551
Level 3 | Derivative financial instruments
Assets:
Total assets	8,117	12,262
Level 3 | Deferred compensation plan liability
Liabilities:
Total liabilities
Level 3 | Brokered certificates of deposit
Liabilities:
Total liabilities
Level 3 | Derivative financial instruments
Liabilities:
Total liabilities	8,117	12,262
Total
Assets:
Total assets	1,828,347	1,809,748	1,862,707
Liabilities:
Total liabilities	32,642	35,861	223,503
Total | U.S. Treasury securities
Assets:
Total assets	48,414	105,709
Total | U.S. Government agencies
Assets:
Total assets	37,268	36,299
Total | State and political subdivisions
Assets:
Total assets	16,352	20,233	23,006
Total | Mortgage-backed securities
Assets:
Total assets	1,041,114	996,820	1,128,112
Total | Corporate bonds
Assets:
Total assets	187,707	165,628	251,924
Total | Asset-backed securities
Assets:
Total assets	468,728	455,928	432,062
Total | Other
Assets:
Total assets	2,390	2,117	2,572
Total | Deferred compensation plan assets
Assets:
Total assets	3,366	3,864	3,468
Total | SBA servicing rights
Assets:
Total assets	2,717	2,551
Total | Derivative financial instruments
Assets:
Total assets	20,291	20,599	21,563
Total | Deferred compensation plan liability
Liabilities:
Total liabilities	3,366	3,864	3,468
Total | Brokered certificates of deposit
Liabilities:
Total liabilities			177,726
Total | Derivative financial instruments
Liabilities:
Total liabilities	$29,276	$31,997	$42,309

Assets_and_Liabilities_Measure3

Assets and Liabilities Measured at Fair Value - Assets and liabilities measured at fair value (Details 1) (Recurring, Level 3, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative Asset
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$12,262
Purchases
Additions
Sales and settlements
Other comprehensive income
Amounts included in earnings - fair value adjustments	-4,145
Transfers between valuation levels, net	0
Balance at end of period	8,117
Derivative Liability
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	18,979
Purchases
Additions
Sales and settlements
Other comprehensive income
Amounts included in earnings - fair value adjustments	-4,450
Transfers between valuation levels, net	0
Balance at end of period	14,529
SBA servicing rights
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,551
Purchases
Additions	190
Sales and settlements
Other comprehensive income
Amounts included in earnings - fair value adjustments	-24
Transfers between valuation levels, net
Balance at end of period	2,717
Securities Available-for-Sale
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	750	350
Purchases
Additions
Sales and settlements
Other comprehensive income
Amounts included in earnings - fair value adjustments
Transfers between valuation levels, net
Balance at end of period	$750	$350

Assets_and_Liabilities_Measure4

Assets and Liabilities Measured at Fair Value - Level 3 fair value measurements for fair value on recurring basis (Details 2) (Recurring, Level 3, USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets	$11,584	15,563	$350
Liabilities, fair value	14,529	18,979
Derivative Asset
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets	8,117	12,262
ValuationTechnique	Dealer Priced
Unobservable Inputs	Dealer Priced
Derivative Liability
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets	14,529	18,979
ValuationTechnique	Dealer Priced
Unobservable Inputs	Dealer Priced
SBA servicing rights
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets	2,717	2,551
ValuationTechnique	Discounted cash flow
Unobservable Inputs	Discount rate Prepayment Rate
SBA servicing rights | Weighted Average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	11.10%	12.00%
Prepayment Rate	7.26%	6.70%
Corporate bonds
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets	$750	750	$350
ValuationTechnique	Indicative bid provided by a broker
Unobservable Inputs	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company

Assets_and_Liabilities_Measure5

Assets and Liabilities Measured at Fair Value - Assets and liabilities measured at fair value on nonrecurring basis (Details 3) (Nonrecurring, USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Level 1
Assets
Loans
Foreclosed properties
Total assets
Level 2
Assets
Loans
Foreclosed properties
Total assets
Level 3
Assets
Loans	80,432	83,541	79,918
Foreclosed properties	1,021	1,555	3,120
Total assets	81,453	85,096	83,038
Total
Assets
Loans	80,432	83,541	79,918
Foreclosed properties	1,021	1,555	3,120
Total assets	$81,453	$85,096	$83,038

Assets_and_Liabilities_Measure6

Assets and Liabilities Measured at Fair Value - Fair values for other financial instruments that are not measured at fair value on recurring basis (Details 4) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Assets:
Securities held to maturity	$413,550	$425,233	$473,136
Loans, net	4,717,682	4,600,500	4,280,485
Level 1
Assets:
Securities held to maturity
Loans, net
Mortgage loans held for sale
Liabilities:
Deposits
Federal Home Loan Bank advances
Long-term debt
Level 2
Assets:
Securities held to maturity	413,550	425,233	473,136
Loans, net
Mortgage loans held for sale	16,181	14,139	11,121
Liabilities:
Deposits	6,438,984	6,328,264	6,238,927
Federal Home Loan Bank advances	270,124	270,125	50,125
Long-term debt
Level 3
Assets:
Securities held to maturity
Loans, net	4,686,611	4,549,027	4,201,255
Mortgage loans held for sale
Liabilities:
Deposits
Federal Home Loan Bank advances
Long-term debt	116,919	132,814	130,636
Total
Assets:
Securities held to maturity	413,550	425,233	473,136
Loans, net	4,686,611	4,549,027	4,201,255
Mortgage loans held for sale	16,181	14,139	11,121
Liabilities:
Deposits	6,438,984	6,328,264	6,238,927
Federal Home Loan Bank advances	270,124	270,125	50,125
Long-term debt	116,919	132,814	130,636
Carrying Amount
Assets:
Securities held to maturity	399,228	415,267	464,697
Loans, net	4,717,682	4,600,500	4,280,485
Mortgage loans held for sale	15,723	13,737	10,933
Liabilities:
Deposits	6,437,931	6,326,513	6,247,541
Federal Home Loan Bank advances	270,125	270,125	50,125
Long-term debt	$113,901	$129,865	$129,865

Assets_and_Liabilities_Measure7

Assets and Liabilities Measured at Fair Value (Detail Textual)	3 Months Ended
	Mar. 31, 2015
Fair Value [Abstract]
Percentage of written down in appraisal value of nonaccrual impaired loans	80.00%
Percentage of written down in appraisal value of foreclosed properties	80.00%
Percentage of written down in asking price of foreclosed properties	90.00%
Maximum remaining maturity of financial instruments having no defined maturity	180 days

Commitments_and_Contingencies_1

Commitments and Contingencies - Contractual amount of off-balance sheet instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Commitments to extend credit
Financial instruments whose contract amounts represent credit risk:
Financial instruments	$972,819	$878,160	$720,891
Letters of credit
Financial instruments whose contract amounts represent credit risk:
Financial instruments	$24,310	$19,861	$19,960

Subsequent_Events_Detail_Textu

Subsequent Events (Detail Textual) (USD $)	1 Months Ended
	Apr. 21, 2015	Apr. 22, 2015	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
		Corridor
		Branch
Subsequent Event [Line Items]
Total assets			$7,663,903,000	$7,566,986,000	$7,398,237,000
Deposits			6,437,931,000	6,326,512,000	6,247,541,000
Subsequent Event | Palmetto Bancshares, Inc.
Subsequent Event [Line Items]
Total assets		1,200,000,000
Loans		832,000,000
Deposits		967,000,000
Number of branches		25
Number of corridor		85
Business acquisition share price		$19.25
Business acquisition equivalent shares		0.97
Percentage of consideration exchange for cash		30.00%
Percentage of consideration common stock		70.00%
Number of average closing days	10 days
Share price	$18.78
Aggregate deal value	$240,500,000