Southside Bancshares (SBSI) 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 04, 2014
Entity Information [Line Items]	'	'
Entity Registrant Name	'SOUTHSIDE BANCSHARES INC	'
Entity Central Index Key	'0000705432	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-known Seasoned Issuer	'No	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	18,845,618

CONSOLIDATED_BALANCE_SHEETS_UN

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS	'		'
Cash and due from banks	$53,880		$45,624
Interest earning deposits	100,543		8,807
Total cash and cash equivalents	154,423		54,431
Investment securities:	'		'
Available for sale, at estimated fair value	351,908		337,429
Held to maturity, carrying value	390,221		391,552
Mortgage-backed securities:	'		'
Available for sale, at estimated fair value	751,740		840,258
Held to maturity, carrying value	260,659		275,569
FHLB stock, at cost	25,512		34,065
Other investments, at cost	2,064		2,065
Loans held for sale	755		151
Loans:	'		'
Loans	1,391,285		1,351,273
Less: Allowance for loan losses	-18,408		-18,877
Net loans	1,372,877		1,332,396
Premises and equipment, net	53,322		52,060
Goodwill	22,034		22,034
Other intangible assets, net	123		178
Interest receivable	20,512		21,973
Deferred tax asset	12,726		18,415
Unsettled trades to sell securities	19,183		3,933
Other assets	60,603		59,154
TOTAL ASSETS	3,498,662		3,445,663
Deposits:	'		'
Noninterest bearing	711,391		529,897
Interest bearing	1,890,087		1,997,911
Total deposits	2,601,478		2,527,808
Short-term obligations:	'		'
Federal funds purchased and repurchase agreements	2,057		859
FHLB advances	8,413		73,445
Total short-term obligations	10,470		74,304
Long-term obligations:	'		'
FHLB advances	505,710	[1]	499,349	[1]
Long-term debt	60,311	[2]	60,311	[2]
Total long-term obligations	566,021		559,660
Unsettled trades to purchase securities	10,269		973
Other liabilities	26,464		23,400
TOTAL LIABILITIES	3,214,702		3,186,145
Off-Balance Sheet Arrangements, Commitments and Contingencies	'		'
Shareholders' equity:	'		'
Common stock ($1.25 par, 40,000,000 shares authorized, 21,315,256 shares issued at June 30, 2014 and 20,386,221 shares issued at December 31, 2013)	26,644		25,483
Paid-in capital	240,305		214,091
Retained earnings	63,469		78,673
Treasury stock (2,469,638 shares at cost)	-37,692		-37,692
Accumulated other comprehensive loss	-8,766		-21,037
TOTAL SHAREHOLDERS' EQUITY	283,960		259,518
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$3,498,662		$3,445,663
[1]	At June 30, 2014, the weighted average cost of these advances was 1.44%. Long-term FHLB Advances have maturities ranging from July 2015 through July 2028.
[2]	This long-term debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.

CONSOLIDATED_BALANCE_SHEETS_UN1

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Held-to-maturity Securities, Other Disclosure Items [Abstract]	'	'
Held to Maturity, Investment Securities, fair value	$394,638	$377,383
Held to Maturity, Mortgage Backed Securities, fair value	$266,185	$271,836
Shareholders' equity:	'	'
Common stock, par value (in dollars per share)	$1.25	$1.25
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	21,315,256	20,386,221
Treasury stock (in shares)	2,469,638	2,469,638

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income	'	'	'	'
Loans	$18,305	$18,390	$36,668	$36,055
Investment securities - taxable	143	169	266	533
Investment securities - tax exempt	6,021	5,907	11,979	10,395
Mortgage-backed securities	7,557	4,680	15,239	8,616
FHLB stock and other investments	38	34	108	99
Other interest earning assets	22	35	65	78
Total interest income	32,086	29,215	64,325	55,776
Interest expense	'	'	'	'
Deposits	1,984	2,001	4,100	4,071
Short-term obligations	56	389	127	1,639
Long-term obligations	2,190	1,954	4,350	3,735
Total interest expense	4,230	4,344	8,577	9,445
Net interest income	27,856	24,871	55,748	46,331
Provision for loan losses	2,650	2,021	6,783	2,513
Net interest income after provision for loan losses	25,206	22,850	48,965	43,818
Noninterest income	'	'	'	'
Deposit services	3,794	3,904	7,432	7,657
Net gain on sale of securities available for sale	498	5,001	509	9,346
Total other-than-temporary impairment losses	0	0	0	-52
Portion of loss recognized in other comprehensive income (before taxes)	0	0	0	10
Net impairment losses recognized in earnings	0	0	0	-42
Gain on sale of loans	81	241	161	560
Trust income	762	733	1,542	1,453
Bank owned life insurance income	307	264	621	518
Other	1,073	953	2,056	1,844
Total noninterest income	6,515	11,096	12,321	21,336
Noninterest expense	'	'	'	'
Salaries and employee benefits	13,092	13,401	26,194	26,610
Occupancy expense	1,786	1,897	3,540	3,768
Advertising, travel & entertainment	605	656	1,148	1,297
ATM and debit card expense	302	303	619	684
Professional fees	1,304	562	2,231	1,202
Software and data processing expense	486	444	987	987
Telephone and communications	320	384	598	835
FDIC insurance	434	409	882	830
FHLB prepayment fees	0	988	0	988
Other	2,097	2,122	4,409	4,284
Total noninterest expense	20,426	21,166	40,608	41,485
Income before income tax expense	11,295	12,780	20,678	23,669
Provision for income tax expense	838	1,712	1,997	3,559
Net income	$10,457	$11,068	$18,681	$20,110
Earnings per common share - basic (in dollars per share)	$0.55	$0.59	$0.99	$1.07
Earnings per common share - diluted (in dollars per share)	$0.55	$0.59	$0.99	$1.07
Dividends paid on common stock (in dollars per shares)	$0.21	$0.20	$0.42	$0.40

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$10,457	$11,068	$18,681	$20,110
Other comprehensive income (loss):	'	'	'	'
Unrealized holding gains (losses) on available for sale securities during the period	8,308	-38,536	18,319	-44,280
Change in net unrealized loss on securities transferred to held to maturity	278	28	554	28
Noncredit portion of other-than-temporary impairment losses on the AFS securities	0	0	0	-10
Reclassification adjustment for net gain on sale of available for sale securities, included in net income	-498	-5,001	-509	-9,346
Reclassification of other-than-temporary impairment charges on available for sale securities, included in net income	0	0	0	42
Amortization of net actuarial loss, included in net periodic benefit cost	289	751	521	1,394
Amortization of prior service credit, included in net periodic benefit cost	-4	-11	-7	-22
Other comprehensive income (loss), before tax	8,373	-42,769	18,878	-52,194
Income tax (expense) benefit related to other items of comprehensive income	-2,930	14,969	-6,607	18,268
Other comprehensive income (loss), net of tax	5,443	-27,800	12,271	-33,926
Comprehensive income (loss)	$15,900	($16,732)	$30,952	($13,816)

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (USD $)	Total	Common Stock	Paid In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
In Thousands, unless otherwise specified
Balance at Dec. 31, 2012	$257,763	$24,308	$195,602	$70,708	($35,793)	$2,938
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net Income	20,110	'	'	20,110	'	'
Other comprehensive income (loss)	-33,926	'	'	'	'	-33,926
Issuance of common stock	628	35	593	'	'	'
Purchase of common stock	-1,899	'	'	'	-1,899	'
Stock compensation expense	373	'	373	'	'	'
Tax benefit of incentive stock options or awards	22	'	22	'	'	'
Net issuance of common stock under employee stock plan	13	12	63	-62	'	'
Cash dividends paid on common stock	-6,964	'	'	-6,964	'	'
Stock dividend declared	0	1,065	15,995	-17,060	'	'
Balance at Jun. 30, 2013	236,120	25,420	212,648	66,732	-37,692	-30,988
Balance at Dec. 31, 2013	259,518	25,483	214,091	78,673	-37,692	-21,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net Income	18,681	'	'	18,681	'	'
Other comprehensive income (loss)	12,271	'	'	'	'	12,271
Issuance of common stock	523	23	500	'	'	'
Stock compensation expense	577	'	577	'	'	'
Tax benefit of incentive stock options or awards	38	'	38	'	'	'
Net issuance of common stock under employee stock plan	69	14	158	-103	'	'
Cash dividends paid on common stock	-7,717	'	'	-7,717	'	'
Stock dividend declared	0	1,124	24,941	-26,065	'	'
Balance at Jun. 30, 2014	$283,960	$26,644	$240,305	$63,469	($37,692)	($8,766)

CONSOLIDATED_STATEMENTS_OF_CHA1

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Issuance of common stock (in shares)	18,265	28,529
Dividends paid on common stock (in dollars per shares)	$0.42	$0.40
Purchase of common stock (in shares)	0	90,300

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES:	'	'
Net income	$18,681	$20,110
Adjustments to reconcile net income to net cash provided by operations:	'	'
Depreciation	1,615	1,807
Amortization of premium	10,750	16,015
Accretion of discount and loan fees	-1,971	-2,852
Provision for loan losses	6,783	2,513
Stock compensation expense	577	373
Increase (Decrease) in Deferred Income Taxes	-1,361	909
Excess tax benefits from stock-based compensation	-42	-22
Net gain on sale of securities available for sale	-509	-9,346
Net other-than-temporary impairment losses	0	42
Gain on premises and equipment	-7	0
Loss (gain) on other real estate owned	65	-72
Net change in:	'	'
Interest receivable	1,461	-1,947
Other assets	-1,459	-6,990
Interest payable	-40	-481
Other liabilities	3,356	69
Loans held for sale	-604	2,877
Net cash provided by operating activities	37,295	23,005
Securities held to maturity:	'	'
Purchases	0	-115,647
Maturities, calls and principal repayments	14,797	118,178
Securities available for sale:	'	'
Purchases	-327,668	-1,018,900
Sales	252,696	612,459
Maturities, calls and principal repayments	153,637	179,203
Proceeds from redemption of FHLB stock	8,938	5,242
Purchases of FHLB stock and other investments	-384	-4,506
Net increase in loans	-49,047	-35,355
Purchases of premises and equipment	-2,878	-1,918
Proceeds from sales of premises and equipment	8	0
Proceeds from sales of other real estate owned	275	461
Proceeds from sales of repossessed assets	3,268	2,304
Net cash provided by (used in) investing activities	53,642	-258,479
FINANCING ACTIVITIES:	'	'
Net increase in demand and savings accounts	157,322	140,307
Net decrease in certificates of deposit	-83,711	-3,947
Net increase (decrease) in federal funds purchased and repurchase agreements	1,198	-127
Proceeds from FHLB advances	6,267,018	6,792,758
Repayment of FHLB advances	-6,325,689	-6,786,150
Excess tax benefits from stock-based awards	42	22
Net issuance of common stock under employee stock plan	69	13
Purchase of common stock	0	-1,899
Proceeds from the issuance of common stock	523	628
Cash dividends paid	-7,717	-6,964
Net cash provided by financing activities	9,055	134,641
Net increase (decrease) in cash and cash equivalents	99,992	-100,833
Cash and cash equivalents at beginning of period	54,431	150,630
Cash and cash equivalents at end of period	154,423	49,797
SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION:	'	'
Interest paid	8,617	9,925
Income taxes paid	3,550	1,600
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES:	'	'
Loans transferred to other repossessed assets and real estate through foreclosure	2,807	2,555
Transfer of available for sale securities to held to maturity securities	0	290,136
Adjustment to pension liability	-514	-1,372
5% stock dividend	26,065	17,060
Unsettled trades to purchase securities	-10,269	-27,814
Unsettled trades to sell securities	19,183	0
Unsettled issuances of brokered CDs	$0	$11,069

CONSOLIDATED_STATEMENTS_OF_CAS1

CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF CASH FLOW (Parenthetical)	0 Months Ended	6 Months Ended
	Mar. 20, 2014	Jun. 30, 2014	Jun. 30, 2013
		Rate	Rate
Stock dividends, percentage of common stock	5.00%	5.00%	5.00%

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	In this report, the words “the Company,” “we,” “us,” and “our” refer to the combined entities of Southside Bancshares, Inc. and its subsidiaries.  The words “Southside” and “Southside Bancshares” refer to Southside Bancshares, Inc.  The words “Southside Bank” and “the Bank” refer to Southside Bank. “SFG” refers to SFG Finance, LLC (formerly Southside Financial Group, LLC), which is a wholly-owned subsidiary of the Bank.
	In early 2013, we decided to close Southside Securities, Inc., our introducing broker-dealer. We completed the closure of Southside Securities, Inc. during the second quarter of 2013.
	The consolidated balance sheet as of June 30, 2014, and the related consolidated statements of income, comprehensive income, changes in shareholders' equity and cash flows and notes to the financial statements for the three- and six-month periods ended June 30, 2014 and 2013 are unaudited; in the opinion of management, all adjustments necessary for a fair statement of such financial statements have been included.  Such adjustments consisted only of normal recurring items.  All significant intercompany accounts and transactions are eliminated in consolidation.  The preparation of these consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires the use of management’s estimates.  These estimates are subjective in nature and involve matters of judgment.  Actual amounts could differ from these estimates.
	Interim results are not necessarily indicative of results for a full year.  These financial statements should be read in conjunction with the financial statements and notes thereto in our Annual Report on Form 10-K for the year ended December 31, 2013.  For a description of our significant accounting and reporting policies, refer to Note 1 of the Notes to Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2013.
	On March 20, 2014, our board of directors declared a 5% stock dividend to common stock shareholders of record as of April 10, 2014, which was paid on May 1, 2014. All share data has been adjusted to give retroactive recognition to stock dividends.
	Accounting Pronouncements
	In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (ASU) 2014-04 “Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure” to clarify when an entity is considered to have obtained physical possession of a residential real estate property collateralizing a consumer mortgage loan. Upon physical possession (from an in-substance possession or foreclosure) of such real property, an entity is required to reclassify the nonperforming mortgage loan to other real estate owned. The ASU is effective for our interim and annual periods beginning after January 1, 2015.  Early adoption is permitted. ASU 2014-04 is not expected to have a material impact on our consolidated financial statements.

Pending_Acquisitions_Pending_A

Pending Acquisitions Pending Acquisitions	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	'
	Pending Acquisitions
	On April 28, 2014, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with OmniAmerican Bancorp, Inc., a Maryland corporation (“OmniAmerican”) and the holding company for OmniAmerican Bank, a federal savings association based in Fort Worth, Texas. As of June 30, 2014, OmniAmerican had $1.4 billion in assets. The Merger Agreement provides that, subject to the terms and conditions thereof, OmniAmerican will merge with and into the Company, with the Company as the surviving corporation. The merger is expected to close during the fourth quarter of 2014, subject to receipt of regulatory approvals and approvals by both our shareholders and OmniAmerican's stockholders.
	Pursuant to the Merger Agreement, each outstanding share of common stock of OmniAmerican will be converted into (a) 0.4459 of a share of common stock of the Company, subject to adjustment pursuant to the terms of the Merger Agreement and (b) $13.125 in cash.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	Earnings per share on a basic and diluted basis have been adjusted to give retroactive recognition to stock dividends and is calculated as follows (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Basic and Diluted Earnings:
	Net income	$	10,457	$	11,068	$	18,681	$	20,110
	Basic weighted-average shares outstanding	18,832		18,744		18,825		18,748
	Add:   Stock options	93		34		89		28
	Diluted weighted-average shares outstanding	18,925		18,778		18,914		18,776
	Basic Earnings Per Share:	$	0.55	$	0.59	$	0.99	$	1.07
	Diluted Earnings Per Share:	$	0.55	$	0.59	$	0.99	$	1.07
	For the three- and six-month periods ended June 30, 2014, there were approximately 18,000 and 21,000 anti-dilutive shares, respectively. For the three- and six-month periods ended June 30, 2013, there were approximately 10,000 and 18,000 anti-dilutive shares, respectively.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive (Loss) Income	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive (Loss) Income	'
	Accumulated Other Comprehensive (Loss) Income
	The changes in accumulated other comprehensive income by component are as follows (in thousands):
		Six Months Ended June 30, 2014
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	(8,656	)	$	—		$	(12	)	$	(12,369	)	$	(21,037	)
	Other comprehensive income (loss) before reclassifications	18,873			—			—			—			18,873
	Reclassified to income	(509		)	—			(7		)	521			5
	Income tax benefit (expense)	(6,427		)	—			2			(182		)	(6,607		)
	Net current-period other comprehensive income (loss), net of tax	11,937			—			(5		)	339			12,271
	Ending balance, net of tax	$	3,281		$	—		$	(17	)	$	(12,030	)	$	(8,766	)
		Three Months Ended June 30, 2014
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	(1,977	)	$	—		$	(14	)	$	(12,218	)	$	(14,209	)
	Other comprehensive income (loss) before reclassifications	8,586			—			—			—			8,586
	Reclassified to income	(498		)	—			(4		)	289			(213		)
	Income tax benefit (expense)	(2,830		)	—			1			(101		)	(2,930		)
	Net current-period other comprehensive income (loss), net of tax	5,258			—			(3		)	188			5,443
	Ending balance, net of tax	$	3,281		$	—		$	(17	)	$	(12,030	)	$	(8,766	)
		Six Months Ended June 30, 2013
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	30,500		$	(1,140	)	$	248		$	(26,670	)	$	2,938
	Other comprehensive income (loss) before reclassifications	(44,416		)	154			—			—			(44,262		)
	Reclassified to income	(9,346		)	42			(22		)	1,394			(7,932		)
	Income tax benefit (expense)	18,816			(68		)	8			(488		)	18,268
	Net current-period other comprehensive (loss) income, net of tax	(34,946		)	128			(14		)	906			(33,926		)
	Ending balance, net of tax	$	(4,446	)	$	(1,012	)	$	234		$	(25,764	)	$	(30,988	)
		Three Months Ended June 30, 2013
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	24,194		$	(1,371	)	$	241		$	(26,252	)	$	(3,188	)
	Other comprehensive income (loss) before reclassifications	(39,060		)	552			—			—			(38,508		)
	Reclassified to income	(5,001		)	—			(11		)	751			(4,261		)
	Income tax benefit (expense)	15,421			(193		)	4			(263		)	14,969
	Net current-period other comprehensive (loss) income, net of tax	(28,640		)	359			(7		)	488			(27,800		)
	Ending balance, net of tax	$	(4,446	)	$	(1,012	)	$	234		$	(25,764	)	$	(30,988	)
	The reclassifications out of accumulated other comprehensive income into net income are presented below (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Unrealized gains and losses on available for sale securities:
	Realized net (loss) gain on sale of securities (1)	$	498		$	5,001		$	509		$	9,346
	Impairment losses (2)	—			—			—			(42		)
	Total before tax	498			5,001			509			9,304
	Tax expense	(174		)	(1,750		)	(178		)	(3,256		)
	Net of tax	$	324		$	3,251		$	331		$	6,048
	Amortization of pension plan items:
	Net actuarial loss (3)	$	(289	)	$	(751	)	$	(521	)	$	(1,394	)
	Prior service credit (3)	4			11			7			22
Total before tax	(285		)	(740		)	(514		)	(1,372		)
Tax benefit	100			259			180			480
Net of tax	$	(185	)	$	(481	)	$	(334	)	$	(892	)
Total reclassifications for the period, net of tax	$	139		$	2,770		$	(3	)	$	5,156
(1) Listed as Net gain on sale of securities available for sale on the Statements of Income.
(2) Listed as Net impairment losses recognized in earnings on the Statements of Income.
(3) These accumulated other comprehensive income components are included in the computation of net periodic benefit cost presented in “Note 8 - Employee Benefit Plans.”

Securities

Securities	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Securities	'
	Securities
	The amortized cost, carrying value, and estimated fair value of investment and mortgage-backed securities as of June 30, 2014 and December 31, 2013 are reflected in the tables below (in thousands):
			June 30, 2014
						Recognized in OCI									Not recognized in OCI
			Amortized			Gross			Gross Unrealized			Carrying			Gross			Gross Unrealized		Estimated
						Unrealized									Unrealized
	AVAILABLE FOR SALE		Cost			Gains			Losses			Value			Gains			Losses		Fair Value
	Investment Securities:
	U.S. Treasuries		$	29,388		$	74		$	56		$	29,406							$	29,406
	State and Political Subdivisions		306,164			6,505			3,438			309,231								309,231
	Other Stocks and Bonds		13,080			191			—			13,271								13,271
	Mortgage-backed Securities: (1)
	Residential		639,149			14,396			1,484			652,061								652,061
	Commercial		99,137			1,018			476			99,679								99,679
	Total		$	1,086,918		$	22,184		$	5,454		$	1,103,648							$	1,103,648
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions		$	395,077		$	5,554		$	10,410		$	390,221		$	6,895		$	2,478	$	394,638
	Mortgage-backed Securities: (1)
	Residential		59,335			—			84			59,251			3,515			—		62,766
	Commercial		208,149			—			6,741			201,408			3,935			1,924		203,419
	Total		$	662,561		$	5,554		$	17,235		$	650,880		$	14,345		$	4,402	$	660,823
			December 31, 2013
						Recognized in OCI									Not recognized in OCI
			Amortized			Gross			Gross Unrealized			Carrying			Gross			Gross Unrealized		Estimated
						Unrealized									Unrealized
	AVAILABLE FOR SALE		Cost			Gains			Losses			Value			Gains			Losses		Fair Value
	Investment Securities:
	U.S. Government Agency Debentures		$	11,612		$	—		$	1,483		$	10,129							$	10,129
	State and Political Subdivisions		322,412			4,537			12,875			314,074								314,074
	Other Stocks and Bonds		13,074			159			7			13,226								13,226
	Mortgage-backed Securities:(1)
	Residential		760,418			14,940			3,273			772,085								772,085
	Commercial		71,262			220			3,309			68,173								68,173
	Total		$	1,178,778		$	19,856		$	20,947		$	1,177,687							$	1,177,687
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions		$	396,549		$	5,925		$	10,922		$	391,552		$	1,207		$	15,376	$	377,383
	Mortgage-backed Securities:(1)
	Residential		74,129			—			99			74,030			3,923			—		77,953
	Commercial		208,667			—			7,128			201,539			—			7,656		193,883
	Total		$	679,345		$	5,925		$	18,149		$	667,121		$	5,130		$	23,032	$	649,219
	(1) All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
	During 2013, the Company transferred certain commercial mortgage-backed securities and state and political subdivision securities from available for sale (“AFS”) to held to maturity (“HTM”). We transferred these securities due to overall balance sheet strategies, and our management has the current intent and ability to hold these securities until maturity. The net unrealized loss on the transferred securities included in accumulated other comprehensive income at the time of transfer will be amortized over the remaining life of the underlying security as an adjustment of the yield on those securities. There were no securities transferred from AFS to HTM during the six months ended June 30, 2014.
	The following table represents the unrealized loss on securities as of June 30, 2014 and December 31, 2013 (in thousands):
		As of June 30, 2014
		Less Than 12 Months						More Than 12 Months						Total
		Fair Value			Unrealized			Fair Value			Unrealized			Fair Value			Unrealized
					Loss						Loss						Loss
	AVAILABLE FOR SALE
	Investment Securities:
	U.S. Treasuries	$	14,622		$	56		$	—		$	—		$	14,622		$	56
	State and Political Subdivisions	52,132			424			118,123			3,014			170,255			3,438
	Mortgage-backed Securities:
	Residential	55,955			224			47,083			1,260			103,038			1,484
	Commercial	5,442			13			26,967			463			32,409			476
	Total	$	128,151		$	717		$	192,173		$	4,737		$	320,324		$	5,454
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions	$	61,771		$	320		$	130,419		$	2,158		$	192,190		$	2,478
	Mortgage-backed Securities:
	Commercial	—			—			100,580			1,924			100,580			1,924
	Total	$	61,771		$	320		$	230,999		$	4,082		$	292,770		$	4,402
	As of December 31, 2013
	Less Than 12 Months						More Than 12 Months						Total
	Fair Value			Unrealized			Fair Value			Unrealized			Fair Value			Unrealized
				Loss						Loss						Loss
AVAILABLE FOR SALE
Investment Securities:
U.S. Government Agency Debentures	$	—		$	—		$	10,129		$	1,483		$	10,129		$	1,483
State and Political Subdivisions	191,117			11,757			18,408			1,118			209,525			12,875
Other Stocks and Bonds	2,992			7			—			—			2,992			7
Mortgage-backed Securities:
Residential	126,965			3,266			1,351			7			128,316			3,273
Commercial	65,406			3,309			—			—			65,406			3,309
Total	$	386,480		$	18,339		$	29,888		$	2,608		$	416,368		$	20,947
HELD TO MATURITY
Investment Securities:
State and Political Subdivisions	$	283,667		$	15,311		$	1,705		$	65		$	285,372		$	15,376
Mortgage-backed Securities:
Commercial	193,883			7,656			—			—			193,883			7,656
Total	$	477,550		$	22,967		$	1,705		$	65		$	479,255		$	23,032
We review securities in an unrealized loss position to evaluate if a classification of other-than-temporarily impaired is warranted. In estimating other-than-temporary impairment losses, management considers, among other things, the length of time and the extent to which the fair value has been less than cost and the financial condition and near-term prospects of the issuer.  The Company considers an other-than-temporary impairment to have occurred when there is an adverse change in expected cash flows.   When it is determined that a decline in fair value of HTM and AFS securities is other-than-temporary, the carrying value of the security is reduced to its estimated fair value, with a corresponding charge to earnings for the credit portion and to other comprehensive income for the noncredit portion.
The majority of the unrealized loss positions are comprised of highly rated municipal securities and U.S. Agency mortgage- backed securities (“MBS”) where the unrealized loss is a direct result of the change in interest rates and spreads. Based upon the length of time and the extent to which fair value is less than cost, we believe the securities with an unrealized loss are not other-than-temporarily impaired at June 30, 2014.
Prior to December 31, 2013, we held pooled trust preferred securities ("TRUPs"). The turmoil in the capital markets had a significant impact on our estimate of fair value of our TRUPs. These TRUPs were structured products with cash flows dependent upon securities issued by U.S. financial institutions, including banks and insurance companies.   Given the facts and circumstances associated with the TRUPs, we reviewed the financial condition of each of the underlying issuing banks within the TRUP collateral pool that had not deferred and defaulted and performed detailed cash flow modeling for each TRUP. During the first six months of 2013, the additional write-down recognized in earnings was approximately $42,000.
The following table presents a roll forward of the credit losses recognized in earnings on the TRUPs (in thousands):
	Three Months Ended			Six Months Ended
	June 30,			June 30,
	2013			2013
Balance, beginning of period	$	3,298		$	3,256
Additions for credit losses recognized on debt securities that had previously incurred impairment losses	—			42
Balance, end of period	$	3,298		$	3,298
On December 13, 2013, management decided to sell all TRUPs as a result of new guidance effective in 2014 as listed in Section 419 of the Dodd-Frank Act (the “Volcker Rule”). The sale of the TRUPs, with a $2.7 million amortized-cost basis, resulted in a loss of approximately $959,000. Until the final rules under the Volcker Rule were issued by the agencies on December 10, 2013, management did not intend to sell the securities and it was not more likely than not that we would be required to sell the security before the anticipated recovery of its amortized cost basis.
Interest income recognized on securities for the periods presented (in thousands):
	Six Months Ended
	June 30,
	2014			2013
U.S. Treasury	$	41		$	17
U.S. Government Agency Debentures	100			305
State and Political Subdivisions	12,001			10,507
Other Stocks and Bonds	103			99
Mortgage-backed Securities	15,239			8,616
Total interest income on securities	$	27,484		$	19,544
	Three Months Ended
	June 30,
	2014			2013
U.S. Treasury	$	41		$	—
U.S. Government Agency Debentures	41			93
State and Political Subdivisions	6,031			5,929
Other Stocks and Bonds	51			54
Mortgage-backed Securities	7,557			4,680
Total interest income on securities	$	13,721		$	10,756
Of the approximately $509,000 in net securities gains from the AFS portfolio for the six months ended June 30, 2014, there were $4.6 million in realized gains and $4.1 million in realized losses.  Of the $9.3 million in net securities gains from the AFS portfolio for the six months ended June 30, 2013, there were $10.7 million in realized gains and approximately $1.4 million in realized losses. There were no sales from the HTM portfolio during the six months ended June 30, 2014 or 2013.
The amortized cost, carrying value and fair value of securities at June 30, 2014, are presented below by contractual maturity.  Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations.  MBS are presented in total by category due to the fact that MBS typically are issued with stated principal amounts, and the securities are backed by pools of mortgages that have loans with varying maturities.  The characteristics of the underlying pool of mortgages, such as fixed-rate or adjustable-rate, as well as prepayment risk, are passed on to the security holder.  The term of a mortgage-backed pass-through security thus approximates the term of the underlying mortgages and can vary significantly due to prepayments.
	June 30, 2014
	Amortized Cost			Fair Value
AVAILABLE FOR SALE	(in thousands)
Investment Securities:
Due in one year or less	$	3,410		$	3,456
Due after one year through five years	18,990			19,509
Due after five years through ten years	63,009			63,789
Due after ten years	263,223			265,154
	348,632			351,908
Mortgage-backed Securities:	738,286			751,740
Total	$	1,086,918		$	1,103,648
	June 30, 2014
	Carrying Value			Fair Value
HELD TO MATURITY	(in thousands)
Investment Securities:
Due in one year or less	$	—		$	—
Due after one year through five years	329			331
Due after five years through ten years	18,741			18,739
Due after ten years	371,151			375,568
	390,221			394,638
Mortgage-backed Securities:	260,659			266,185
Total	$	650,880		$	660,823
Investment and MBS with carrying values of $976.6 million and $1.14 billion were pledged as of June 30, 2014 and December 31, 2013, respectively, to collateralize Federal Home Loan Bank (“FHLB”) advances, repurchase agreements, and public funds or for other purposes as required by law.
Securities with limited marketability, such as FHLB stock and other investments, are carried at cost, which approximates their fair value and are assessed for other-than-temporary impairment.  These securities have no maturity date.

Loans_and_Allowance_for_Probab

Loans and Allowance for Probable Loan Losses	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Loans and Allowance for Probable Loan Losses	'
	Loans and Allowance for Probable Loan Losses
	Loans in the accompanying consolidated balance sheets are classified as follows (in thousands):
		June 30, 2014			31-Dec-13
	Real Estate Loans:
	Construction	$	164,668		$	125,219
	1-4 Family Residential	391,675			390,499
	Other	271,858			262,536
	Commercial Loans	156,893			157,655
	Municipal Loans	239,883			245,550
	Loans to Individuals	166,308			169,814
	Total Loans	1,391,285			1,351,273
	Less: Allowance for Loan Losses	18,408			18,877
	Net Loans	$	1,372,877		$	1,332,396
	Real Estate Construction Loans
	Our construction loans are collateralized by property located primarily in the market areas we serve.  A majority of our construction loans will be owner-occupied.  Construction loans for speculative projects are financed, but these typically have secondary sources of repayment and collateral.  Our construction loans have both adjustable and fixed interest rates during the construction period.  Construction loans to individuals are typically priced and made with the intention of granting the permanent loan on the property.  Speculative and commercial construction loans are subject to underwriting standards similar to that of the commercial portfolio. Owner occupied 1-4 family residential construction loans are subject to the underwriting standards of the permanent loan.
	Real Estate 1-4 Family Residential Loans
	Residential loan originations are generated by our loan officers, in-house origination staff, marketing efforts, present customers, walk-in customers and referrals from real estate agents and builders.  We focus our lending efforts primarily on the origination of loans secured by first mortgages on owner-occupied, 1-4 family residences.  Substantially all of our 1-4 family residential loan originations are secured by properties located in or near our market areas.
	Our 1-4 family residential loans generally have maturities ranging from five to 30 years.  These loans are typically fully amortizing with monthly payments sufficient to repay the total amount of the loan.  Our 1-4 family residential loans are made at both fixed and adjustable interest rates.
	Underwriting for 1-4 family residential loans includes debt-to-income analysis, credit history analysis, appraised value and down payment considerations. Changes in the market value of real estate can affect the potential losses in the portfolio.
	Other Real Estate
	Other Real Estate loans primarily include loans collateralized by commercial office buildings, retail, medical facilities and offices, warehouse facilities, hotels and churches.  In determining whether to originate commercial real estate loans, we generally consider such factors as the financial condition of the borrower and the debt service coverage of the property.  Other real estate loans are made at both fixed and adjustable interest rates for terms generally up to 20 years.
	Commercial Loans
	Our commercial loans are diversified loan types including short-term working capital loans for inventory and accounts receivable and short- and medium-term loans for equipment or other business capital expansion.  Management does not consider there to be a concentration of risk in any one industry type, other than the medical industry.  Loans to borrowers in the medical industry include all loan types listed above for commercial loans.  Collateral for these loans varies depending on the type of loan and financial strength of the borrower.  The primary source of repayment for loans in the medical community is cash flow from continuing operations.
	In our commercial loan underwriting, we assess the creditworthiness, ability to repay, and the value and liquidity of the collateral being offered.  Terms of commercial loans are generally commensurate with the useful life of the collateral offered.
	Municipal Loans
	We have a specific lending department that makes loans to municipalities and school districts throughout the state of Texas.  The majority of the loans to municipalities and school districts have tax or revenue pledges and in some cases are additionally supported by collateral.  Municipal loans made without a direct pledge of taxes or revenues are usually made based on some type of collateral that represents an essential service.
	Loans to Individuals
	Substantially all originations of our loans to individuals are made to consumers in our market areas.  The majority of loans to individuals are collateralized by titled equipment, which are primarily automobiles. Loan pools purchased through SFG are subjected to a modeling system that takes into consideration credit scores and estimated collateral values to determine expected defaults in each pool. SFG purchased loan pools of approximately $30.4 million and $45.3 million, net of discount, during the six months ended June 30, 2014 and June 30, 2013, respectively. For the three months ended June 30, 2014 and June 30, 2013, SFG purchased loan pools of approximately $9.6 million and $23.5 million, net of discount.
	Consumer loan terms vary according to the type and value of collateral, length of contract and creditworthiness of the borrower.  The underwriting standards we employ for consumer loans include an application, a determination of the applicant's payment history on other debts, with the greatest weight being given to payment history with us, and an assessment of the borrower's ability to meet existing obligations and payments on the proposed loan.  Although creditworthiness of the applicant is a primary consideration, the underwriting process also includes a comparison of the value of the collateral, if any, in relation to the proposed loan amount. Most of our loans to individuals are collateralized, which management believes should assist in limiting our exposure.
	Allowance for Loan Losses
	The allowance for loan losses is based on the most current review of the loan portfolio and is a result of multiple processes.  First, the bank utilizes historical data to establish general reserve amounts for each class of loans. The historical charge off figure is further adjusted through qualitative factors that include general trends in past dues, nonaccruals and classified loans to more effectively and promptly react to both positive and negative movements. Second, our lenders have the primary responsibility for identifying problem loans and estimating necessary reserves based on customer financial stress and underlying collateral.  These recommendations are reviewed by senior loan administration, the Special Assets department, and the Loan Review department.  Third, the Loan Review department independently reviews the portfolio on an annual basis.  The Loan Review department follows a board-approved annual loan review scope.  The loan review scope encompasses a number of considerations including the size of the loan, the type of credit extended, the seasoning of the loan and the performance of the loan.  The Loan Review scope, as it relates to size, focuses more on larger dollar loan relationships, typically, for example, aggregate debt of $500,000 or greater.  The Loan Review officer also reviews specific reserves compared to general reserves to determine trends in comparative reserves as well as losses not reserved for prior to charge-off to determine the effectiveness of the specific reserve process.
	At each review, a subjective analysis methodology is used to grade the respective loan.  Categories of grading vary in severity from loans that do not appear to have a significant probability of loss at the time of review to loans that indicate a probability that the entire balance of the loan will be uncollectible.  If full collection of the loan balance appears unlikely at the time of review, estimates of future expected cash flows or appraisals of the collateral securing the debt are used to determine the necessary allowances.  The internal loan review department maintains a list of all loans or loan relationships that are graded as having more than the normal degree of risk associated with them. In addition, a list of specifically reserved loans or loan relationships of $50,000 or more is updated on a quarterly basis in order to properly determine necessary allowances and keep management informed on the status of attempts to correct the deficiencies noted with respect to the loan.
	For loans to individuals, the methodology associated with determining the appropriate allowance for losses on loans primarily consists of an evaluation of individual payment histories, remaining term to maturity and underlying collateral support.
	SFG loans, included in loans to individuals, experiencing past due status or extension of maturity characteristics are reserved for at higher levels based on the circumstances associated with each specific loan.  In general the reserves for SFG are calculated based on the past due status of the loan.  For reserve purposes, the portfolio has been segregated by past due status and by the remaining term variance from the original contract.  During repayment, loans that pay late will take longer to repay than the original contract.  Additionally, some loans may be granted extensions for extenuating payment circumstances and evaluated for troubled debt classification.  The remaining term extensions increase the risk of collateral deterioration and, accordingly, reserves are increased to recognize this risk.
	Industry and our own experience indicates that a portion of our loans will become delinquent and a portion of the loans will require partial or full charge-off.  Regardless of the underwriting criteria utilized, losses may be experienced as a result of various factors beyond our control, including, among other things, changes in market conditions affecting the value of properties used as collateral for loans and problems affecting the credit of the borrower and the ability of the borrower to make payments on the loan.  Our determination of the appropriateness of the allowance for loan losses is based on various considerations, including an analysis of the risk characteristics of various classifications of loans, previous loan loss experience, specific loans which would have loan loss potential, delinquency trends, estimated fair value of the underlying collateral, current economic conditions, and geographic and industry loan concentration.
	Credit Quality Indicators
	We categorize loans into risk categories on an ongoing basis 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 economic trends, among other factors.  We use the following definitions for risk ratings:
	•	Pass (Rating 1 – 4) – This rating is assigned to all satisfactory loans.  This category, by definition, consists of acceptable credit.  Credit and collateral exceptions should not be present, although their presence would not necessarily prohibit a loan from being rated Pass, if deficiencies are in process of correction.  These loans are not included in the Watch List.
	•	Pass Watch (Rating 5) – Special Treatment Required – These loans require some degree of special treatment, but not due to credit quality.  This category does not include loans specially mentioned or adversely classified by Loan Review; however, particular attention must be accorded such credits due to characteristics such as:
	•	A lack of, or abnormally extended payment, program;
	•	A heavy degree of concentration of collateral without sufficient margin;
	•	A vulnerability to competition through lesser or extensive financial leverage; and
	•	A dependence on a single, or few customers, or sources of supply and materials without suitable substitutes or alternatives.
	•	Special Mention (Rating 6) – A Special Mention asset has potential weaknesses that deserve management’s close attention.  If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date.  Special Mention assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification.
	•	Substandard (Rating 7) – Substandard loans are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any.  Loans so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt.  They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected.
	•	Doubtful (Rating 8) – Loans classified as Doubtful have all the weaknesses inherent in those classified Substandard with the added characteristic that the weaknesses make collection or liquidation, in full, on the basis of currently known facts, conditions and values, highly questionable and improbable.
	Loans that are accruing and not considered troubled debt restructurings ("TDR") are reserved for as a group of similar type credits and included in the general portion of the allowance for loan losses.
	The general portion of the loan loss allowance is reflective of historical charge-off levels for similar loans adjusted for changes in current conditions and other relevant factors.  These factors are likely to cause estimated losses to differ from historical loss experience and include:
	•	Changes in lending policies or procedures, including underwriting, collection, charge-off, and recovery procedures;
	•	Changes in local, regional and national economic and business conditions including entry into new markets;
	•	Changes in the volume or type of credit extended;
	•	Changes in the experience, ability, and depth of lending management;
	•	Changes in the volume and severity of past due, nonaccrual, restructured, or classified loans;
	•	Changes in charge-off trends;
	•	Changes in loan review or Board oversight;
	•	Changes in the level of concentrations of credit; and
	•	Changes in external factors, such as competition and legal and regulatory requirements.
	The following tables detail activity in the allowance for loan losses by portfolio segment for the periods presented (in thousands):
		Six Months Ended June 30, 2014
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
					Residential						Loans			Loans			Individuals
	Balance at beginning of period	$	2,142		$	3,277		$	2,572		$	1,970		$	668		$	8,248		$	—		$	18,877
Provision (reversal) for loan losses	309			628			(140		)	(319		)	(5		)	6,310			—			6,783
Loans charged off	(14		)	(22		)	—			(5		)	—			(8,273		)	—			(8,314		)
Recoveries of loans charged off	59			32			4			111			—			856			—			1,062
Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	—		$	18,408
	Three Months Ended June 30, 2014
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
				Residential						Loans			Loans			Individuals
Balance at beginning of period	$	2,130		$	3,797		$	2,411		$	2,031		$	777		$	7,641		$	—		$	18,787
Provision (reversal) for loan losses	319			92			24			(322		)	(114		)	2,651			—			2,650
Loans charged off	—			—			—			(5		)	—			(3,541		)	—			(3,546		)
Recoveries of loans charged off	47			26			1			53			—			390			—			517
Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	—		$	18,408
	Six Months Ended June 30, 2013
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
				Residential						Loans			Loans			Individuals
Balance at beginning of period	$	2,355		$	3,545		$	2,290		$	3,158		$	633		$	7,373		$	1,231		$	20,585
Provision (reversal) for loan losses	(277		)	281			(129		)	(620		)	—			3,916			(658		)	2,513
Loans charged off	—			(228		)	(67		)	(198		)	—			(5,364		)	—			(5,857		)
Recoveries of loans charged off	22			11			10			110			—			976			—			1,129
Balance at end of period	$	2,100		$	3,609		$	2,104		$	2,450		$	633		$	6,901		$	573		$	18,370
	Three Months Ended June 30, 2013
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
				Residential						Loans			Loans			Individuals
Balance at beginning of period	$	2,247		$	3,488		$	2,002		$	2,847		$	621		$	6,451		$	886		$	18,542
Provision (reversal) for loan losses	(152		)	114			118			(330		)	12			2,572			(313		)	2,021
Loans charged off	—			—			(21		)	(127		)	—			(2,557		)	—			(2,705		)
Recoveries of loans charged off	5			7			5			60			—			435			—			512
Balance at end of period	$	2,100		$	3,609		$	2,104		$	2,450		$	633		$	6,901		$	573		$	18,370
The following tables present the balance in the allowance for loan losses by portfolio segment based on impairment method (in thousands):
	As of June 30, 2014
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
				Residential						Loans			Loans			Individuals
Ending balance – individually evaluated for impairment	$	113		$	226		$	160		$	372		$	15		$	72		$	958
Ending balance – collectively evaluated for impairment	2,383			3,689			2,276			1,385			648			7,069			17,450
Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	18,408
	As of December 31, 2013
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
				Residential						Loans			Loans			Individuals
Ending balance – individually evaluated for impairment	$	103		$	161		$	73		$	240		$	15		$	173		$	765
Ending balance – collectively evaluated for impairment	2,039			3,116			2,499			1,730			653			8,075			18,112
Balance at end of period	$	2,142		$	3,277		$	2,572		$	1,970		$	668		$	8,248		$	18,877
The following tables present the recorded investment in loans by portfolio segment based on impairment method (in thousands):
	June 30, 2014
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
				Residential						Loans			Loans			Individuals
Loans individually evaluated for impairment	$	2,067		$	3,991		$	3,567		$	1,087		$	759		$	347		$	11,818
Loans collectively evaluated for impairment	162,601			387,684			268,291			155,806			239,124			165,961			1,379,467
Total ending loan balance	$	164,668		$	391,675		$	271,858		$	156,893		$	239,883		$	166,308		$	1,391,285
	December 31, 2013
	Real Estate
	Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
				Residential						Loans			Loans			Individuals
Loans individually evaluated for impairment	$	1,472		$	2,624		$	1,778		$	1,369		$	759		$	559		$	8,561
Loans collectively evaluated for impairment	123,747			387,875			260,758			156,286			244,791			169,255			1,342,712
Total ending loan balance	$	125,219		$	390,499		$	262,536		$	157,655		$	245,550		$	169,814		$	1,351,273
The following table sets forth loans by credit quality indicator for the periods presented (in thousands):
	June 30, 2014
	Pass			Pass Watch			Special Mention			Substandard			Doubtful			Total
Real Estate Loans:
Construction	$	158,774		$	1,746		$	1,401		$	2,694		$	53		$	164,668
1-4 Family Residential	381,530			1,476			1,733			6,231			705			391,675
Other	259,575			3,873			2,617			5,783			10			271,858
Commercial Loans	135,174			14,534			—			6,889			296			156,893
Municipal Loans	238,874			—			—			1,009			—			239,883
Loans to Individuals	165,609			28			—			493			178			166,308
Total	$	1,339,536		$	21,657		$	5,751		$	23,099		$	1,242		$	1,391,285
	December 31, 2013
	Pass			Pass Watch			Special Mention			Substandard			Doubtful			Total
Real Estate Loans:
Construction	$	121,280		$	—		$	1,419		$	2,454		$	66		$	125,219
1-4 Family Residential	380,741			1,626			3,025			4,901			206			390,499
Other	249,381			2,553			4,698			5,887			17			262,536
Commercial Loans	150,683			836			9			5,826			301			157,655
Municipal Loans	244,505			—			—			1,045			—			245,550
Loans to Individuals	168,764			27			2			719			302			169,814
Total	$	1,315,354		$	5,042		$	9,153		$	20,832		$	892		$	1,351,273
The following table sets forth nonperforming assets for the periods presented (in thousands):
	At			At
	June 30,			December 31,
	2014			2013
Nonaccrual loans	$	9,620		$	8,088
Accruing loans past due more than 90 days	4			3
Restructured loans	4,036			3,888
Other real estate owned	383			726
Repossessed assets	492			901
Total Nonperforming Assets	$	14,535		$	13,606
Nonaccrual and Past Due Loans
Nonaccrual loans are loans 90 days or more delinquent and collection in full of both the principal and interest is not expected.  Additionally, some loans that are not delinquent may be placed on nonaccrual status due to doubts about full collection of principal or interest.  When a loan is categorized as nonaccrual, the accrual of interest is discontinued and any accrued balance is reversed for financial statement purposes.  Payments of contractual interest are recognized as income only to the extent that full recovery of the principal balance of the loan is reasonably certain.  Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.  Other factors, such as the value of collateral securing the loan and the financial condition of the borrower, are considered in judgments as to potential loan loss.
Loans are considered impaired if, based on current information and events, it is probable that we will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement.  The measurement of loss on impaired loans is generally based on the present value of the expected future cash flows discounted at the historical effective interest rate stipulated in the loan agreement, except that all collateral-dependent loans are measured for impairment based on the fair value of the collateral.  In measuring the fair value of the collateral, in addition to relying on third party appraisals, we use assumptions, such as discount rates, and methodologies, such as comparison to the recent selling price of similar assets, consistent with those that would be utilized by unrelated third parties performing a valuation. Loans that are evaluated and determined not to meet the definition of an impaired loan are reserved for at the general reserve rate for its appropriate class.
Nonaccrual loans and accruing loans past due more than 90 days include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans.
The following table sets forth the recorded investment in nonaccrual and accruing loans past due more than 90 days by class of loans for the periods presented (in thousands):
	June 30, 2014						December 31, 2013
	Nonaccrual			Accruing Loans Past Due More Than 90 Days			Nonaccrual			Accruing Loans Past Due More Than 90 Days
Real Estate Loans:
Construction	$	2,067		$	—		$	1,472		$	—
1-4 Family Residential	2,566			—			1,435			—
Other	2,431			—			599			—
Commercial Loans	513			—			1,062			—
Loans to Individuals	2,043			4			3,520			3
Total	$	9,620		$	4		$	8,088		$	3
The following tables present the aging of the recorded investment in past due loans by class of loans (in thousands):
	June 30, 2014
	30-59 Days			60-89 Days			Greater than 90 Days Past Due			Total Past			Current			Total
	Past Due			Past Due						Due
Real Estate Loans:
Construction	$	—		$	—		$	2,067		$	2,067		$	162,601		$	164,668
1-4 Family Residential	40			559			2,566			3,165			388,510			391,675
Other	990			197			2,431			3,618			268,240			271,858
Commercial Loans	16			36			513			565			156,328			156,893
Municipal Loans	—			—			—			—			239,883			239,883
Loans to Individuals	6,705			2,440			2,047			11,192			155,116			166,308
Total	$	7,751		$	3,232		$	9,624		$	20,607		$	1,370,678		$	1,391,285
	December 31, 2013
	30-59 Days Past Due			60-89 Days Past Due			Greater than 90 Days			Total Past			Current			Total
							Past Due			Due
Real Estate Loans:
Construction	$	311		$	—		$	1,472		$	1,783		$	123,436		$	125,219
1-4 Family Residential	4,340			781			1,435			6,556			383,943			390,499
Other	2,652			—			599			3,251			259,285			262,536
Commercial Loans	411			22			1,062			1,495			156,160			157,655
Municipal Loans	—			—			—			—			245,550			245,550
Loans to Individuals	7,241			2,590			3,523			13,354			156,460			169,814
Total	$	14,955		$	3,393		$	8,091		$	26,439		$	1,324,834		$	1,351,273
The following table sets forth interest income recognized on nonaccrual and restructured loans by class of loans for the periods presented. Average recorded investment is reported on a year-to-date basis (in thousands):
	Six Months Ended
	June 30, 2014									June 30, 2013
	Average Recorded Investment			Interest Income Recognized			Accruing			Average			Interest Income Recognized			Accruing Interest at Original Contracted Rate
							Interest at			Recorded
							Original			Investment
							Contracted Rate
Real Estate Loans:
Construction	$	1,578		$	11		$	69		$	1,919		$	3		$	82
1-4 Family Residential	2,982			65			110			3,121			20			82
Other	2,362			75			81			2,159			28			78
Commercial Loans	1,446			19			37			1,979			6			57
Municipal Loans	759			21			21			—			—			—
Loans to Individuals	2,679			103			235			3,030			150			300
Total	$	11,806		$	294		$	553		$	12,208		$	207		$	599
	Three Months Ended
	June 30, 2014									June 30, 2013
	Average Recorded Investment			Interest Income Recognized			Accruing			Average			Interest Income Recognized			Accruing
							Interest at			Recorded						Interest
							Original			Investment						at Original
							Contracted Rate									Contracted Rate
Real Estate Loans:
Construction	$	1,643		$	9		$	35		$	1,551		$	2		$	41
1-4 Family residential	3,418			21			55			3,238			5			42
Other	2,838			22			40			1,900			10			39
Commercial loans	1,444			12			18			1,914			1			28
Municipal loans	759			21			21			—			—			—
Loans to individuals	2,144			23			146			2,689			54			162
Total	$	12,246		$	108		$	315		$	11,292		$	72		$	312
The following table sets forth impaired loans by class of loans for the periods presented (in thousands):
	June 30, 2014
	Unpaid Contractual Principal Balance			Recorded Investment With No Allowance			Recorded Investment With Allowance			Total Recorded Investment			Related
													Allowance for
													Loan Losses
Real Estate Loans:
Construction	$	2,743		$	—		$	2,067		$	2,067		$	113
1-4 Family Residential	4,106			—			3,991			3,991			226
Other	3,577			—			3,567			3,567			160
Commercial Loans	1,236			—			1,087			1,087			372
Municipal Loans	759			—			759			759			15
Loans to Individuals	2,368			—			2,155			2,155			1,048
Total	$	14,789		$	—		$	13,626		$	13,626		$	1,934
	December 31, 2013
	Unpaid			Recorded			Recorded			Total			Related
	Contractual			Investment			Investment			Recorded			Allowance for
	Principal			With No			With			Investment			Loan Losses
	Balance			Allowance			Allowance
Real Estate Loans:
Construction	$	2,629		$	—		$	1,472		$	1,472		$	103
1-4 Family Residential	2,748			—			2,624			2,624			161
Other	1,800			—			1,778			1,778			73
Commercial Loans	1,606			—			1,369			1,369			240
Municipal Loans	759			—			759			759			15
Loans to Individuals	4,280			—			3,943			3,943			1,950
Total	$	13,822		$	—		$	11,945		$	11,945		$	2,542
At the time a loss is probable in the collection of contractual amounts, specific reserves are allocated.  Loans are charged off when deemed uncollectible or as soon as collection by liquidation is evident to the liquidation value of the collateral net of liquidation costs, if any, and placed in nonaccrual status.
Troubled Debt Restructurings
The restructuring of a loan is considered a TDR if both (i) the borrower is experiencing financial difficulties and (ii) the creditor has granted a concession.  Concessions may include interest rate reductions or below market interest rates, principal forgiveness, restructuring amortization schedules and other actions intended to minimize potential losses.
The following tables set forth the recorded investment in TDRs for the periods presented (dollars in thousands):
	Six Months Ended June 30, 2014
	Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
	Period
Real Estate Loans:
1-4 Family Residential	$	—		$	284		$	—		$	284		1
Other	—			—			413			413			2
Commercial Loans	313			—			56			369			5
Loans to Individuals	—			15			45			60			4
Total	$	313		$	299		$	514		$	1,126		12
	Three Months Ended June 30, 2014
	Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
	Period
Real Estate Loans:
1-4 Family Residential	$	—		$	—		$	—		$	—		—
Other	—			—			388			388			1
Commercial Loans	60			—			—			60			2
Loans to Individuals	—			—			—			—			—
Total	$	60		$	—		$	388		$	448		3
	Six Months Ended June 30, 2013
	Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
	Period
Real Estate Loans:
Construction	$	40		$	—		$	—		$	40		1
1-4 Family Residential	285			—			468			753			6
Other	—			—			16			16			1
Commercial Loans	307			—			19			326			5
Loans to Individuals	14			185			35			234			32
Total	$	646		$	185		$	538		$	1,369		45
	Three Months Ended June 30, 2013
	Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
	Period
Real Estate Loans:
1-4 Family Residential	$	—		$	—		$	391		$	391		2
Other	—			—			16			16			1
Commercial Loans	22			—			—			22			1
Loans to Individuals	14			185			28			227			30
Total	$	36		$	185		$	435		$	656		34
(1) These modifications include an extension of the amortization period and interest rate reduction.
The majority of loans restructured as TDRs during the three and six months ended June 30, 2014 were modified with a combination of interest rate reductions and maturity extensions. Interest continues to be charged on principal balances outstanding during the term extended. Therefore, the financial effects of the recorded investment of loans restructured as TDRs during the three and six months ended June 30, 2014 and June 30, 2013 were insignificant. Generally, the loans identified as TDRs were previously reported as impaired loans prior to restructuring and therefore the modification did not impact our determination of the allowance for loan losses.
On an ongoing basis, the performance of the restructured loans is monitored for subsequent payment default. Payment default for TDRs is recognized when the borrower is 90 days or more past due. For the three and six months ended June 30, 2014 and 2013, there were no material defaults. Payment defaults for TDRs did not significantly impact the determination of the allowance for loan loss.
At June 30, 2014 and December 31, 2013, there were no commitments to lend additional funds to borrowers whose terms had been modified in TDRs.

Longterm_Obligations

Long-term Obligations	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-term Obligations	'
	Long-term Obligations
	Long-term obligations are summarized as follows (in thousands):
		June 30,		31-Dec-13
		2014
	FHLB Advances (1)	$	505,710	$	499,349
	Long-term Debt (2)
	Southside Statutory Trust III Due 2033 (3)	20,619		20,619
	Southside Statutory Trust IV Due 2037 (4)	23,196		23,196
	Southside Statutory Trust V Due 2037 (5)	12,887		12,887
	Magnolia Trust Company I Due 2035 (6)	3,609		3,609
	Total Long-term Debt	60,311		60,311
	Total Long-term Obligations	$	566,021	$	559,660
	-1	At June 30, 2014, the weighted average cost of these advances was 1.44%.  Long-term FHLB Advances have maturities ranging from July 2015 through July 2028.
	-2	This long-term debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.
	-3	This debt carries an adjustable rate of 3.1741% through September 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 294 basis points.
	-4	This debt carries an adjustable rate of 1.52485% through July 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 130 basis points.
	-5	This debt carries an adjustable rate of 2.4806% through September 14, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 225 basis points.
	-6	This debt carries an adjustable rate of 2.02735% through August 22, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 180 basis points.

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	The components of net periodic benefit cost are as follows (in thousands):
		Six Months Ended June 30,
		Defined Benefit						Restoration
		Pension Plan						Plan
		2014			2013			2014		2013
	Service cost	$	849		$	1,059		$	137	$	149
	Interest cost	1,748			1,577			281		234
	Expected return on assets	(2,824		)	(2,397		)	—		—
	Net actuarial loss recognition	272			1,099			249		295
	Prior service (credit) cost amortization	(10		)	(21		)	3		(1		)
	Net periodic benefit cost	$	35		$	1,317		$	670	$	677
		Three Months Ended June 30,
		Defined Benefit						Restoration
		Pension Plan						Plan
		2014			2013			2014		2013
	Service cost	$	401		$	503		$	68	$	98
	Interest cost	876			792			145		135
	Expected return on assets	(1,412		)	(1,199		)	—		—
	Net loss recognition	141			554			148		197
	Prior service credit amortization	(6		)	(10		)	2		(1		)
	Net periodic benefit cost	$	—		$	640		$	363	$	429
	Employer Contributions.  As of June 30, 2014, contributions of $120,000 have been made to our Restoration Plan. We do not anticipate contributing to our Defined Benefit Pension Plan in 2014.

Sharebased_Incentive_Plans

Share-based Incentive Plans	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-based Incentive Plans	'
	Share-based Incentive Plans
	2009 Incentive Plan
	On April 16, 2009, our shareholders approved the Southside Bancshares, Inc. 2009 Incentive Plan (the “2009 Incentive Plan”), which is a stock-based incentive compensation plan.  A total of 1,340,098 shares of our common stock were reserved and available for issuance pursuant to awards granted under the 2009 Incentive Plan.  Under the 2009 Incentive Plan, we were authorized to grant nonqualified stock options (“NQSOs”), restricted stock units (“RSUs”), or any combination thereof to certain officers. During the first six months of 2014 and 2013, there were no grants of RSUs or NQSOs pursuant to the 2009 Incentive Plan.
	As of June 30, 2014, there were 356,407 unvested awards outstanding.  For the three and six months ended June 30, 2014, there was share-based compensation expense of $291,000 and $577,000, respectively, with an associated income tax benefit for the three and six months of $102,000 and $202,000, respectively. As of June 30, 2013, there were 305,403 unvested awards outstanding.  Share-based compensation expense for the three and six months ended June 30, 2013 was $166,000 and $373,000, respectively, with an associated income tax benefit for the three and six months of $58,000 and $131,000, respectively.
	As of June 30, 2014 and 2013, there was $2.5 million and $1.7 million of unrecognized compensation cost, respectively, related to the unvested awards outstanding. The remaining cost at June 30, 2014 is expected to be recognized over a weighted-average period of 2.74 years.
	The NQSOs have contractual terms of 10 years and vest in equal annual installments over three- and four-year periods.
	The fair value of each RSU is the closing stock price on the date of grant.  The RSUs vest in equal annual installments over three- and four-year periods.
	Each award is evidenced by an award agreement that specifies the exercise price, if applicable, the duration of the award, the number of shares to which the award pertains, and such other provisions as the Board determines.
	Shares issued in connection with stock compensation awards are issued from authorized shares and not from treasury shares.  During the six months ended June 30, 2014 and 2013, there were 11,812 and 9,994 shares, respectively, issued in connection with stock compensation awards from available authorized shares.
	The following table presents activity related to our RSUs and NQSOs as of June 30, 2014.
				Restricted Stock Units							Stock Options
				Outstanding							Outstanding
		Shares		Number			Weighted-				Number			Weighted-		Weighted-
		Available		of Shares			Average				of Shares			Average		Average
		for Grant					Grant-Date							Exercise		Grant-Date
							Fair Value							Price		Fair Value
	Balance, January 1, 2014	738,764		56,823			$	22			501,846			$	20.56	$	6.18
	Granted	—		—			—				—			—		—
	Stock options exercised	—		—			—				(4,949	)		17.29		5.13
	Stock awards vested	—		(6,525	)		16.58				—			—		—
	Forfeited	16,988		(2,901	)		22.11				(14,087	)		22.3		6.69
	Canceled/expired	1,898		—			—				(1,898	)		18.99		5.27
	Balance, June 30, 2014	757,650		47,397			$	22.73			480,912			$	20.55	$	6.18
	Other information regarding options outstanding and exercisable as of June 30, 2014 is as follows:
						Options Outstanding									Options Exercisable
	Range of Exercise Prices					Number			Weighted-				Weighted-		Number	Weighted-
						of Shares			Average				Average Remaining		of Shares	Average
									Exercise				Contractual			Exercise
									Price				Life in Years			Price
	$	16.58	-	$25.85		480,912			$	20.55			8.2		171,902	$	17.37
	Total					480,912			$	20.55			8.2		171,902	$	17.37
	The total intrinsic value (i.e., the amount by which the fair value of the underlying common stock exceeds the exercise price of a stock option) of outstanding stock options and exercisable stock options was $4.0 million and $2.0 million at June 30, 2014, respectively.
	Cash received from stock options exercises for the six months ended June 30, 2014 and 2013 was $86,000 and $38,000, respectively. The total intrinsic value related to stock options exercised during the six months ended June 30, 2014 and 2013, was approximately $50,000 and $14,000, respectively.

Fair_Value_Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurement	'
	Fair Value Measurement
	Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants.  A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability.  The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs.  An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction.  Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to transact and (iv) willing to transact.
	Valuation techniques including the market approach, the income approach and/or the cost approach are utilized to determine fair value.  Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability.  Valuation policies and procedures are determined by our investment department and reported to our Asset/Liability Committee (“ALCO”) for review.  An entity must consider all aspects of nonperforming risk, including the entity’s own credit standing when measuring fair value of a liability.  Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances.  A fair value hierarchy for valuation inputs gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs.  The fair value hierarchy is as follows:
	Level 1 Inputs - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.
	Level 2 Inputs - Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly.  These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means.
	Level 3 Inputs - Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity's own assumptions about the assumptions that market participants would use in pricing the assets or liabilities.
	A description of the valuation methodologies used for assets and liabilities measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.
	Securities Available for Sale – U.S. Treasury securities are reported at fair value utilizing Level 1 inputs.  Other securities classified as available for sale are reported at fair value utilizing Level 2 inputs.  For these securities, we obtain fair value measurements from an independent pricing service.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things.
	We review the prices quarterly supplied by the independent pricing service for reasonableness and to ensure such prices are aligned with traditional pricing matrices.  In addition, we obtain an understanding of their underlying pricing methodologies and their Statement on Standards for Attestation Engagements-Reporting on Controls of a Service Organization (“SSAE 16”).  We validate prices supplied by the independent pricing service by comparison to prices obtained from, in most cases, three additional third party sources.  For securities where prices are outside a reasonable range, we further review those securities to determine what a reasonable price estimate is for that security, given available data.
	Certain financial assets are measured at fair value in accordance with GAAP.  Adjustments to the fair value of these assets usually result from the application of fair value accounting or write-downs of individual assets.  Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally coincides with our monthly and/or quarterly valuation process.  There were no transfers between Level 1 and Level 2 during the six months ended June 30, 2014.
	Loans Held for Sale - These loans are reported at the lower of cost or fair value.  Fair value is determined based on expected proceeds, which are based on sales contracts and commitments and are considered Level 2 inputs.  At June 30, 2014 and December 31, 2013, based on our estimates of fair value, no valuation allowance was recognized.
	Foreclosed Assets – Foreclosed assets are initially recorded at fair value less costs to sell.  The fair value of foreclosed assets can include Level 2 measurement inputs such as real estate appraisals and comparable real estate sales information, in conjunction with Level 3 measurement inputs such as cash flow projections, qualitative adjustments, sales cost estimates, etc.  As a result, the categorization of foreclosed assets is Level 3 of the fair value hierarchy.  In connection with initial recognition of foreclosed assets, we recognize charge-offs through the allowance for loan losses to the extent the fair value of the foreclosed asset, less costs to sell, is less than the loan amount.
	Impaired Loans – Certain impaired loans may be reported at the fair value of the underlying collateral if repayment is expected solely from the collateral.  Collateral values are estimated using Level 3 inputs based on customized discounting criteria or appraisals.  At June 30, 2014 and December 31, 2013, the impact of loans with specific reserves based on the fair value of the collateral was reflected in our allowance for loan losses.
	Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a recurring basis include reporting units measured at fair value and tested for goodwill impairment.
	The following tables summarize assets measured at fair value on a recurring and nonrecurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands):
		At or For the Six Months Ended June 30, 2014
					Fair Value Measurements at the End of the Reporting Period Using
		Carrying			Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs		Significant Unobservable Inputs		Total Gains
		Amount			(Level 1)				(Level 2)		(Level 3)		(Losses)
	Recurring fair value measurements
	Investment Securities:
	U. S. Treasuries	$	29,406		$	29,406			$	—	$	—	$	—
	State and Political Subdivisions	309,231			—				309,231		—		—
	Other Stocks and Bonds	13,271			—				13,271		—		—
	Mortgage-backed Securities: (1)
	Residential	652,061			—				652,061		—		—
	Commercial	99,679			—				99,679		—		—
	Total recurring fair value measurements	$	1,103,648		$	29,406			$	1,074,242	$	—	$	—
	Nonrecurring fair value measurements
	Foreclosed assets (2)	$	875		$	—			$	—	$	875	$	—
	Impaired loans (3)	11,692			—				—		11,692		(22		)
	Total nonrecurring fair value measurements	$	12,567		$	—			$	—	$	12,567	$	(22	)
		At or For the Year Ended December 31, 2013
					Fair Value Measurements at the End of the Reporting Period Using
		Carrying			Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs		Significant Unobservable Inputs		Total Gains
		Amount			(Level 1)				(Level 2)		(Level 3)		(Losses)
	Recurring fair value measurements
	Investment Securities:
	U.S. Government Agency Debentures	$	10,129		$	—			$	10,129	$	—	$	—
	State and Political Subdivisions	314,074			—				314,074		—		—
	Other Stocks and Bonds	13,226			—				13,226		—		—
	Mortgage-backed Securities: (1)
	Residential	772,085			—				772,085		—		—
	Commercial	68,173			—				68,173		—		—
	Total recurring fair value measurements	$	1,177,687		$	—			$	1,177,687	$	—	$	—
	Nonrecurring fair value measurements
	Foreclosed assets (2)	$	1,627		$	—			$	—	$	1,627	$	(485	)
	Impaired loans (3)	9,403			—				—		9,403		(64		)
	Total nonrecurring fair value measurements	$	11,030		$	—			$	—	$	11,030	$	(549	)
	-1	All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
	-2	Losses represent related losses on foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.
	-3	Loans represent collateral dependent impaired loans with a specific valuation allowance.  Losses on these loans represent charge-offs which are netted against the allowance for loan losses.
	For the periods prior to the TRUPs sale in December 2013, the following table presents additional information about the TRUPs measured at fair value on a recurring basis and for which we utilized Level 3 inputs to determine fair value (in thousands):
			Three Months Ended			Six Months Ended
			June 30,			June 30,
			2013			2013
	TRUPs
	Balance at Beginning of Period		$	592		$	990
	Total gains or losses (realized/unrealized):
	Included in earnings		—			(42		)
	Included in other comprehensive income (loss)		552			196
	Purchases		—			—
	Issuances		—			—
Settlements		—			—
Transfers in and/or out of Level 3		—			—
Balance at End of Period		$	1,144		$	1,144
The amount of total gains or losses for the periods included in earnings attributable to the change in unrealized gains or losses relating to assets still held at reporting date		$	—		$	(42	)
The significant unobservable inputs used in the fair value measurement of our TRUPs included the credit rating downgrades, the severity and duration of the mark-to-market loss, and the structural nuances of each TRUP.  Our analysis of the underlying cash flows contemplated various default, deferral and recovery scenarios to arrive at our best estimate of cash flows.  Significant increases (decreases) in any of those inputs would result in a significant lower (higher) fair value.
Level 3 assets recorded at fair value on a nonrecurring basis at June 30, 2014, included loans for which a specific allowance was established based on the fair value of collateral and other real estate for which fair value of the properties was less than the cost basis.  For both asset classes, the unobservable inputs were the additional adjustments applied by management to the appraised values to reflect such factors as non-current appraisals and revisions to estimated time to sell.  These adjustments are determined based on qualitative judgments made by management on a case-by-case basis and are not quantifiable inputs, although they are used in the determination of fair value.
Disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, is required for which it is practicable to estimate that value.  In cases where quoted market prices are not available, fair values are based on estimates using present value or other estimation techniques.  Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.  Such techniques and assumptions, as they apply to individual categories of our financial instruments, are as follows:
Cash and cash equivalents - The carrying amount for cash and cash equivalents is a reasonable estimate of those assets' fair value.
Investment and mortgage-backed securities - Fair values for these securities are based on quoted market prices, where available.  If quoted market prices are not available, fair values are based on quoted market prices for similar securities or estimates from independent pricing services.
FHLB stock and other investments - The carrying amount of FHLB stock is a reasonable estimate of those assets’ fair value.
Loans receivable - For adjustable rate loans that reprice frequently and with no significant change in credit risk, the carrying amounts are a reasonable estimate of those assets' fair value.  The fair value of fixed rate loans is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.  Nonperforming loans are estimated using discounted cash flow analyses or the underlying value of the collateral where applicable.
Deposit liabilities - The fair value of demand deposits, savings accounts, and certain money market deposits is the amount on demand at the reporting date, that is, the carrying value.  Fair values for fixed rate CDs are estimated using a discounted cash flow calculation that applies interest rates currently being offered for deposits of similar remaining maturities.
Federal funds purchased and repurchase agreements - Federal funds purchased generally have original terms to maturity of one day and repurchase agreements, generally less than one year, and therefore both are considered short-term borrowings. Consequently, their carrying value is a reasonable estimate of fair value.
FHLB advances - The fair value of these advances is estimated by discounting the future cash flows using rates at which advances would be made to borrowers with similar credit ratings and for the same remaining maturities.
Long-term debt - The carrying amount for the long-term debt is estimated by discounting future cash flows using estimated rates at which long-term debt would be made to borrowers with similar credit ratings and for the remaining maturities.
The following tables present our financial assets, financial liabilities, and unrecognized financial instruments measured on a nonrecurring basis at both their respective carrying amounts and fair value (in thousands):
				Estimated Fair Value
June 30, 2014	Carrying			Total				Level 1		Level 2		Level 3
	Amount
Financial Assets:
Cash and cash equivalents	$	154,423		$	154,423			$	154,423	$	—	$	—
Investment securities:
Held to maturity, at carrying value	390,221			394,638				—		394,638		—
Mortgage-backed securities:
Held to maturity, at carrying value	260,659			266,185				—		266,185		—
FHLB stock and other investments, at cost	27,576			27,576				—		27,576		—
Loans, net of allowance for loan losses	1,372,877			1,349,385				—		—		1,349,385
Loans held for sale	755			755				—		755		—
Financial Liabilities:
Retail deposits	$	2,601,478		$	2,600,319			$	—	$	2,600,319	$	—
Federal funds purchased and repurchase agreements	2,057			2,057				—		2,057		—
FHLB advances	514,123			503,535				—		503,535		—
Long-term debt	60,311			43,742				—		43,742		—
				Estimated Fair Value
December 31, 2013	Carrying			Total				Level 1		Level 2		Level 3
	Amount
Financial Assets:
Cash and cash equivalents	$	54,431		$	54,431			$	54,431	$	—	$	—
Investment securities:
Held to maturity, at carrying value	391,552			377,383				—		377,383		—
Mortgage-backed securities:
Held to maturity, at carrying value	275,569			271,836				—		271,836		—
FHLB stock and other investments, at cost	36,130			36,130				—		36,130		—
Loans, net of allowance for loan losses	1,332,396			1,306,524				—		—		1,306,524
Loans held for sale	151			151				—		151		—
Financial Liabilities:
Retail deposits	$	2,527,808		$	2,526,143			$	—	$	2,526,143	$	—
Federal funds purchased and repurchase agreements	859			859				—		859		—
FHLB advances	572,794			559,648				—		559,648		—
Long-term debt	60,311			43,476				—		43,476		—
As discussed earlier, the fair value estimate of financial instruments for which quoted market prices are unavailable is dependent upon the assumptions used.  Consequently, those estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instruments.  Accordingly, the aggregate fair value amounts presented in the above fair value table do not necessarily represent their underlying value.

Income_Taxes_Income_Taxes_Note

Income Taxes Income Taxes (Notes)	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	The provision for income taxes included in the accompanying statements of income consist of the following (in thousands):
		Three Months Ended June 30,						Six Months Ended
								June 30,
		2014			2013			2014			2013
	Current tax provision	$	1,342		$	1,895		$	3,358		$	2,711
	Deferred tax (benefit) provision	(504		)	(183		)	(1,361		)	848
	Provision for tax expense charged to operations	$	838		$	1,712		$	1,997		$	3,559
	Net deferred tax assets totaled $12.7 million at June 30, 2014 and $18.4 million at December 31, 2013. The decrease in net deferred tax assets resulted primarily from a decrease in unrealized losses on securities available for sale, partially offset by an increase in the alternative minimum tax. No valuation allowance for deferred tax assets was recorded at June 30, 2014 or December 31, 2013, as management believes it is more likely than not that all of the deferred tax assets will be realized because they are supported by recoverable taxes paid in prior years. There was approximately $50,000 in unrecognized tax benefits at June 30, 2014.
	We recognized income tax expense of $838,000 and $2.0 million, for an effective tax rate of 7.4% and 9.7% for the three and six months ended June 30, 2014, respectively, compared to $1.7 million and $3.6 million, for an effective tax rate of 13.4% and 15.0% for the three and six months ended June 30, 2013, respectively. The effective tax rate differed from the U.S. statutory rate of 35% during the comparable periods primarily due to the effect of tax-exempt interest from loans, securities and bank owned life insurance. The lower effective tax rate for the three and six months ended June 30, 2014 was due to an increase in tax-exempt income as a percentage of taxable income as compared to the same periods in 2013.
	We file income tax returns in the U.S. federal jurisdiction and in certain states. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2010.

OffBalanceSheet_Arrangements_C

Off-Balance-Sheet Arrangements, Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Off-Balance-Sheet Arrangements, Commitments and Contingencies	'
	Off-Balance-Sheet Arrangements, Commitments and Contingencies
	Financial Instruments with Off-Balance-Sheet Risk. In the normal course of business, we are a party to certain financial instruments, with off-balance-sheet risk, to meet the financing needs of our customers.  These off-balance-sheet instruments include commitments to extend credit and standby letters of credit.  These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount reflected in the financial statements.  The contract or notional amounts of these instruments reflect the extent of involvement and exposure to credit loss that we have in these particular classes of financial instruments.
	Commitments to extend credit are agreements to lend to a customer provided that the terms established in the contract are met.  Commitments generally have fixed expiration dates and may require payment of fees.  Since some commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.  Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party.  These guarantees are primarily issued to support public and private borrowing arrangements.  The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan commitments to customers.
	We had outstanding unused commitments to extend credit of $192.4 million and $156.2 million at June 30, 2014 and December 31, 2013, respectively.  Each commitment has a maturity date and the commitment expires on that date with the exception of credit card and ready reserve commitments, which have no stated maturity date.  Unused commitments for credit card and ready reserve at June 30, 2014 and December 31, 2013 were $14.0 million and $13.8 million, respectively, and are reflected in the due after one year category.  We had outstanding standby letters of credit of $6.1 million and $5.9 million at June 30, 2014 and December 31, 2013, respectively.
	The scheduled maturities of unused commitments were as follows (in thousands):
		At		At
		June 30,		December 31,
		2014		2013
	Unused commitments:
	Due in one year or less	$	133,385	$	110,210
	Due after one year	59,031		46,032
	Total	$	192,416	$	156,242
	We apply the same credit policies in making commitments and standby letters of credit as we do for on-balance-sheet instruments.  We evaluate each customer's creditworthiness on a case-by-case basis.  The amount of collateral obtained, if deemed necessary, upon extension of credit is based on management's credit evaluation of the borrower.  Collateral held varies but may include cash or cash equivalents, negotiable instruments, real estate, accounts receivable, inventory, oil, gas and mineral interests, property, plant, and equipment.
	Lease Commitments. We lease certain branch facilities and office equipment under operating leases.  It is expected that certain leases will be renewed, or equipment replaced with new leased equipment, as these leases expire.
	Securities. In the normal course of business we buy and sell securities.  There were $10.3 million and $973,000 of unsettled trades to purchase securities at June 30, 2014 and December 31, 2013, respectively.  There were $19.2 million and $3.9 million unsettled trades to sell securities as of June 30, 2014 and December 31, 2013, respectively.
	Deposits. There were no unsettled issuances of brokered CDs at June 30, 2014 or December 31, 2013.
	Litigation. We are involved with various litigation in the normal course of business.  Management, after consulting with our legal counsel, believes that any liability resulting from litigation will not have a material effect on our financial position, results of operations or liquidity.
	Litigation Relating to the Merger. On June 25, 2014, a purported stockholder of OmniAmerican filed a lawsuit in the Circuit Court for Baltimore City, Maryland captioned McDougal v. OmniAmerican Bancorp, Inc., et al., Case No. 24-C-14-003920, naming OmniAmerican, members of OmniAmerican's board of directors, Southside and Omega Merger Sub, Inc., a wholly owned subsidiary of Southside (“Merger Sub”), as defendants. The lawsuit is purportedly brought on behalf of a putative class of OmniAmerican's public stockholders and seeks a declaration that it is properly maintainable as a class action and a certification of the plaintiff and her counsel as class representative and class counsel. The lawsuit asserts direct and derivative claims against OmniAmerican's directors and alleges that they breached their fiduciary duties and that OmniAmerican, Southside and Merger Sub aided and abetted those alleged breaches by, among other things, (a) failing to take steps to maximize shareholder value for OmniAmerican public stockholders; (b) failing to properly value OmniAmerican; (c) failing to protect against conflicts of interest; (d) failing to disclose material information necessary for OmniAmerican stockholders to make an informed vote on the merger; and (e) agreeing to deal protection devices that preclude a fair sales process. Among other relief, the plaintiff seeks to enjoin the merger. On July 9, 2014, the plaintiff filed a motion to transfer the case to Maryland's Business and Technology Case Management Program.
	OmniAmerican and Southside believe the claims asserted are without merit and intend to vigorously defend against this lawsuit.

Basis_of_Presentation_Accounti

Basis of Presentation Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Accounting Pronouncements	'
	Accounting Pronouncements
	In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (ASU) 2014-04 “Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure” to clarify when an entity is considered to have obtained physical possession of a residential real estate property collateralizing a consumer mortgage loan. Upon physical possession (from an in-substance possession or foreclosure) of such real property, an entity is required to reclassify the nonperforming mortgage loan to other real estate owned. The ASU is effective for our interim and annual periods beginning after January 1, 2015.  Early adoption is permitted. ASU 2014-04 is not expected to have a material impact on our consolidated financial statements.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings per share on a basic and diluted basis	'
	Earnings per share on a basic and diluted basis have been adjusted to give retroactive recognition to stock dividends and is calculated as follows (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Basic and Diluted Earnings:
	Net income	$	10,457	$	11,068	$	18,681	$	20,110
	Basic weighted-average shares outstanding	18,832		18,744		18,825		18,748
	Add:   Stock options	93		34		89		28
	Diluted weighted-average shares outstanding	18,925		18,778		18,914		18,776
	Basic Earnings Per Share:	$	0.55	$	0.59	$	0.99	$	1.07
	Diluted Earnings Per Share:	$	0.55	$	0.59	$	0.99	$	1.07

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive (Loss) Income (Tables)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule of accumulated other comprehensive income (loss) by component	'
	The changes in accumulated other comprehensive income by component are as follows (in thousands):
		Six Months Ended June 30, 2014
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	(8,656	)	$	—		$	(12	)	$	(12,369	)	$	(21,037	)
	Other comprehensive income (loss) before reclassifications	18,873			—			—			—			18,873
	Reclassified to income	(509		)	—			(7		)	521			5
	Income tax benefit (expense)	(6,427		)	—			2			(182		)	(6,607		)
	Net current-period other comprehensive income (loss), net of tax	11,937			—			(5		)	339			12,271
	Ending balance, net of tax	$	3,281		$	—		$	(17	)	$	(12,030	)	$	(8,766	)
		Three Months Ended June 30, 2014
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	(1,977	)	$	—		$	(14	)	$	(12,218	)	$	(14,209	)
	Other comprehensive income (loss) before reclassifications	8,586			—			—			—			8,586
	Reclassified to income	(498		)	—			(4		)	289			(213		)
	Income tax benefit (expense)	(2,830		)	—			1			(101		)	(2,930		)
	Net current-period other comprehensive income (loss), net of tax	5,258			—			(3		)	188			5,443
	Ending balance, net of tax	$	3,281		$	—		$	(17	)	$	(12,030	)	$	(8,766	)
		Six Months Ended June 30, 2013
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	30,500		$	(1,140	)	$	248		$	(26,670	)	$	2,938
	Other comprehensive income (loss) before reclassifications	(44,416		)	154			—			—			(44,262		)
	Reclassified to income	(9,346		)	42			(22		)	1,394			(7,932		)
	Income tax benefit (expense)	18,816			(68		)	8			(488		)	18,268
	Net current-period other comprehensive (loss) income, net of tax	(34,946		)	128			(14		)	906			(33,926		)
	Ending balance, net of tax	$	(4,446	)	$	(1,012	)	$	234		$	(25,764	)	$	(30,988	)
		Three Months Ended June 30, 2013
		Unrealized Gains (Losses) on Securities						Pension Plans
		Other			OTTI			Net Prior			Net Gain (Loss)			Total
								Service
								(Cost)
								Credit
	Beginning balance, net of tax	$	24,194		$	(1,371	)	$	241		$	(26,252	)	$	(3,188	)
	Other comprehensive income (loss) before reclassifications	(39,060		)	552			—			—			(38,508		)
	Reclassified to income	(5,001		)	—			(11		)	751			(4,261		)
	Income tax benefit (expense)	15,421			(193		)	4			(263		)	14,969
	Net current-period other comprehensive (loss) income, net of tax	(28,640		)	359			(7		)	488			(27,800		)
	Ending balance, net of tax	$	(4,446	)	$	(1,012	)	$	234		$	(25,764	)	$	(30,988	)
Reclassifications out of accumulated other comprehensive income	'
	The reclassifications out of accumulated other comprehensive income into net income are presented below (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Unrealized gains and losses on available for sale securities:
	Realized net (loss) gain on sale of securities (1)	$	498		$	5,001		$	509		$	9,346
	Impairment losses (2)	—			—			—			(42		)
	Total before tax	498			5,001			509			9,304
	Tax expense	(174		)	(1,750		)	(178		)	(3,256		)
	Net of tax	$	324		$	3,251		$	331		$	6,048
	Amortization of pension plan items:
	Net actuarial loss (3)	$	(289	)	$	(751	)	$	(521	)	$	(1,394	)
	Prior service credit (3)	4			11			7			22
	Total before tax	(285		)	(740		)	(514		)	(1,372		)
	Tax benefit	100			259			180			480
	Net of tax	$	(185	)	$	(481	)	$	(334	)	$	(892	)
	Total reclassifications for the period, net of tax	$	139		$	2,770		$	(3	)	$	5,156
	(1) Listed as Net gain on sale of securities available for sale on the Statements of Income.
	(2) Listed as Net impairment losses recognized in earnings on the Statements of Income.
	(3) These accumulated other comprehensive income components are included in the computation of net periodic benefit cost presented in “Note 8 - Employee Benefit Plans.”

Securities_Tables

Securities (Tables)	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Amortized cost and estimated fair value of investment and mortgage-backed securities	'
	The amortized cost, carrying value, and estimated fair value of investment and mortgage-backed securities as of June 30, 2014 and December 31, 2013 are reflected in the tables below (in thousands):
			June 30, 2014
						Recognized in OCI									Not recognized in OCI
			Amortized			Gross			Gross Unrealized			Carrying			Gross			Gross Unrealized		Estimated
						Unrealized									Unrealized
	AVAILABLE FOR SALE		Cost			Gains			Losses			Value			Gains			Losses		Fair Value
	Investment Securities:
	U.S. Treasuries		$	29,388		$	74		$	56		$	29,406							$	29,406
	State and Political Subdivisions		306,164			6,505			3,438			309,231								309,231
	Other Stocks and Bonds		13,080			191			—			13,271								13,271
	Mortgage-backed Securities: (1)
	Residential		639,149			14,396			1,484			652,061								652,061
	Commercial		99,137			1,018			476			99,679								99,679
	Total		$	1,086,918		$	22,184		$	5,454		$	1,103,648							$	1,103,648
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions		$	395,077		$	5,554		$	10,410		$	390,221		$	6,895		$	2,478	$	394,638
	Mortgage-backed Securities: (1)
	Residential		59,335			—			84			59,251			3,515			—		62,766
	Commercial		208,149			—			6,741			201,408			3,935			1,924		203,419
	Total		$	662,561		$	5,554		$	17,235		$	650,880		$	14,345		$	4,402	$	660,823
			December 31, 2013
						Recognized in OCI									Not recognized in OCI
			Amortized			Gross			Gross Unrealized			Carrying			Gross			Gross Unrealized		Estimated
						Unrealized									Unrealized
	AVAILABLE FOR SALE		Cost			Gains			Losses			Value			Gains			Losses		Fair Value
	Investment Securities:
	U.S. Government Agency Debentures		$	11,612		$	—		$	1,483		$	10,129							$	10,129
	State and Political Subdivisions		322,412			4,537			12,875			314,074								314,074
	Other Stocks and Bonds		13,074			159			7			13,226								13,226
	Mortgage-backed Securities:(1)
	Residential		760,418			14,940			3,273			772,085								772,085
	Commercial		71,262			220			3,309			68,173								68,173
	Total		$	1,178,778		$	19,856		$	20,947		$	1,177,687							$	1,177,687
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions		$	396,549		$	5,925		$	10,922		$	391,552		$	1,207		$	15,376	$	377,383
	Mortgage-backed Securities:(1)
	Residential		74,129			—			99			74,030			3,923			—		77,953
	Commercial		208,667			—			7,128			201,539			—			7,656		193,883
	Total		$	679,345		$	5,925		$	18,149		$	667,121		$	5,130		$	23,032	$	649,219
	(1) All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
Unrealized loss on securities	'
	The following table represents the unrealized loss on securities as of June 30, 2014 and December 31, 2013 (in thousands):
		As of June 30, 2014
		Less Than 12 Months						More Than 12 Months						Total
		Fair Value			Unrealized			Fair Value			Unrealized			Fair Value			Unrealized
					Loss						Loss						Loss
	AVAILABLE FOR SALE
	Investment Securities:
	U.S. Treasuries	$	14,622		$	56		$	—		$	—		$	14,622		$	56
	State and Political Subdivisions	52,132			424			118,123			3,014			170,255			3,438
	Mortgage-backed Securities:
	Residential	55,955			224			47,083			1,260			103,038			1,484
	Commercial	5,442			13			26,967			463			32,409			476
	Total	$	128,151		$	717		$	192,173		$	4,737		$	320,324		$	5,454
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions	$	61,771		$	320		$	130,419		$	2,158		$	192,190		$	2,478
	Mortgage-backed Securities:
	Commercial	—			—			100,580			1,924			100,580			1,924
	Total	$	61,771		$	320		$	230,999		$	4,082		$	292,770		$	4,402
		As of December 31, 2013
		Less Than 12 Months						More Than 12 Months						Total
		Fair Value			Unrealized			Fair Value			Unrealized			Fair Value			Unrealized
					Loss						Loss						Loss
	AVAILABLE FOR SALE
	Investment Securities:
	U.S. Government Agency Debentures	$	—		$	—		$	10,129		$	1,483		$	10,129		$	1,483
	State and Political Subdivisions	191,117			11,757			18,408			1,118			209,525			12,875
	Other Stocks and Bonds	2,992			7			—			—			2,992			7
	Mortgage-backed Securities:
	Residential	126,965			3,266			1,351			7			128,316			3,273
	Commercial	65,406			3,309			—			—			65,406			3,309
	Total	$	386,480		$	18,339		$	29,888		$	2,608		$	416,368		$	20,947
	HELD TO MATURITY
	Investment Securities:
	State and Political Subdivisions	$	283,667		$	15,311		$	1,705		$	65		$	285,372		$	15,376
	Mortgage-backed Securities:
	Commercial	193,883			7,656			—			—			193,883			7,656
	Total	$	477,550		$	22,967		$	1,705		$	65		$	479,255		$	23,032
Credit losses recognized in earnings	'
	The following table presents a roll forward of the credit losses recognized in earnings on the TRUPs (in thousands):
		Three Months Ended			Six Months Ended
		June 30,			June 30,
		2013			2013
	Balance, beginning of period	$	3,298		$	3,256
	Additions for credit losses recognized on debt securities that had previously incurred impairment losses	—			42
	Balance, end of period	$	3,298		$	3,298
Interest income recognized on securities	'
	Interest income recognized on securities for the periods presented (in thousands):
		Six Months Ended
		June 30,
		2014			2013
	U.S. Treasury	$	41		$	17
	U.S. Government Agency Debentures	100			305
	State and Political Subdivisions	12,001			10,507
	Other Stocks and Bonds	103			99
	Mortgage-backed Securities	15,239			8,616
	Total interest income on securities	$	27,484		$	19,544
		Three Months Ended
		June 30,
		2014			2013
	U.S. Treasury	$	41		$	—
	U.S. Government Agency Debentures	41			93
	State and Political Subdivisions	6,031			5,929
	Other Stocks and Bonds	51			54
	Mortgage-backed Securities	7,557			4,680
	Total interest income on securities	$	13,721		$	10,756
Amortized cost, carrying value and fair value of securities presented by contractual maturity	'
	The amortized cost, carrying value and fair value of securities at June 30, 2014, are presented below by contractual maturity.  Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations.  MBS are presented in total by category due to the fact that MBS typically are issued with stated principal amounts, and the securities are backed by pools of mortgages that have loans with varying maturities.  The characteristics of the underlying pool of mortgages, such as fixed-rate or adjustable-rate, as well as prepayment risk, are passed on to the security holder.  The term of a mortgage-backed pass-through security thus approximates the term of the underlying mortgages and can vary significantly due to prepayments.
		June 30, 2014
		Amortized Cost			Fair Value
	AVAILABLE FOR SALE	(in thousands)
	Investment Securities:
	Due in one year or less	$	3,410		$	3,456
	Due after one year through five years	18,990			19,509
	Due after five years through ten years	63,009			63,789
	Due after ten years	263,223			265,154
		348,632			351,908
	Mortgage-backed Securities:	738,286			751,740
	Total	$	1,086,918		$	1,103,648
		June 30, 2014
		Carrying Value			Fair Value
	HELD TO MATURITY	(in thousands)
	Investment Securities:
	Due in one year or less	$	—		$	—
	Due after one year through five years	329			331
	Due after five years through ten years	18,741			18,739
	Due after ten years	371,151			375,568
		390,221			394,638
	Mortgage-backed Securities:	260,659			266,185
	Total	$	650,880		$	660,823

Loans_and_Allowance_for_Probab1

Loans and Allowance for Probable Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Classification of loans in the consolidated balance sheets	'
	Loans in the accompanying consolidated balance sheets are classified as follows (in thousands):
		June 30, 2014			31-Dec-13
	Real Estate Loans:
	Construction	$	164,668		$	125,219
	1-4 Family Residential	391,675			390,499
	Other	271,858			262,536
	Commercial Loans	156,893			157,655
	Municipal Loans	239,883			245,550
	Loans to Individuals	166,308			169,814
	Total Loans	1,391,285			1,351,273
	Less: Allowance for Loan Losses	18,408			18,877
	Net Loans	$	1,372,877		$	1,332,396
Activity in the allowance for loan losses by portfolio segment	'
	The following tables detail activity in the allowance for loan losses by portfolio segment for the periods presented (in thousands):
		Six Months Ended June 30, 2014
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
					Residential						Loans			Loans			Individuals
	Balance at beginning of period	$	2,142		$	3,277		$	2,572		$	1,970		$	668		$	8,248		$	—		$	18,877
	Provision (reversal) for loan losses	309			628			(140		)	(319		)	(5		)	6,310			—			6,783
	Loans charged off	(14		)	(22		)	—			(5		)	—			(8,273		)	—			(8,314		)
	Recoveries of loans charged off	59			32			4			111			—			856			—			1,062
	Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	—		$	18,408
		Three Months Ended June 30, 2014
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
					Residential						Loans			Loans			Individuals
	Balance at beginning of period	$	2,130		$	3,797		$	2,411		$	2,031		$	777		$	7,641		$	—		$	18,787
	Provision (reversal) for loan losses	319			92			24			(322		)	(114		)	2,651			—			2,650
	Loans charged off	—			—			—			(5		)	—			(3,541		)	—			(3,546		)
	Recoveries of loans charged off	47			26			1			53			—			390			—			517
	Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	—		$	18,408
		Six Months Ended June 30, 2013
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
					Residential						Loans			Loans			Individuals
	Balance at beginning of period	$	2,355		$	3,545		$	2,290		$	3,158		$	633		$	7,373		$	1,231		$	20,585
	Provision (reversal) for loan losses	(277		)	281			(129		)	(620		)	—			3,916			(658		)	2,513
	Loans charged off	—			(228		)	(67		)	(198		)	—			(5,364		)	—			(5,857		)
	Recoveries of loans charged off	22			11			10			110			—			976			—			1,129
	Balance at end of period	$	2,100		$	3,609		$	2,104		$	2,450		$	633		$	6,901		$	573		$	18,370
		Three Months Ended June 30, 2013
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Unallocated			Total
					Residential						Loans			Loans			Individuals
	Balance at beginning of period	$	2,247		$	3,488		$	2,002		$	2,847		$	621		$	6,451		$	886		$	18,542
	Provision (reversal) for loan losses	(152		)	114			118			(330		)	12			2,572			(313		)	2,021
	Loans charged off	—			—			(21		)	(127		)	—			(2,557		)	—			(2,705		)
	Recoveries of loans charged off	5			7			5			60			—			435			—			512
	Balance at end of period	$	2,100		$	3,609		$	2,104		$	2,450		$	633		$	6,901		$	573		$	18,370
Balance in the allowance for loan losses by portfolio segment based on impairment method	'
	The following tables present the balance in the allowance for loan losses by portfolio segment based on impairment method (in thousands):
		As of June 30, 2014
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
					Residential						Loans			Loans			Individuals
	Ending balance – individually evaluated for impairment	$	113		$	226		$	160		$	372		$	15		$	72		$	958
	Ending balance – collectively evaluated for impairment	2,383			3,689			2,276			1,385			648			7,069			17,450
	Balance at end of period	$	2,496		$	3,915		$	2,436		$	1,757		$	663		$	7,141		$	18,408
		As of December 31, 2013
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
					Residential						Loans			Loans			Individuals
	Ending balance – individually evaluated for impairment	$	103		$	161		$	73		$	240		$	15		$	173		$	765
	Ending balance – collectively evaluated for impairment	2,039			3,116			2,499			1,730			653			8,075			18,112
	Balance at end of period	$	2,142		$	3,277		$	2,572		$	1,970		$	668		$	8,248		$	18,877
Balance in recorded investments in loans by portfolio segment based on impairment method	'
	The following tables present the recorded investment in loans by portfolio segment based on impairment method (in thousands):
		June 30, 2014
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
					Residential						Loans			Loans			Individuals
	Loans individually evaluated for impairment	$	2,067		$	3,991		$	3,567		$	1,087		$	759		$	347		$	11,818
	Loans collectively evaluated for impairment	162,601			387,684			268,291			155,806			239,124			165,961			1,379,467
	Total ending loan balance	$	164,668		$	391,675		$	271,858		$	156,893		$	239,883		$	166,308		$	1,391,285
		December 31, 2013
		Real Estate
		Construction			1-4 Family			Other			Commercial			Municipal			Loans to			Total
					Residential						Loans			Loans			Individuals
	Loans individually evaluated for impairment	$	1,472		$	2,624		$	1,778		$	1,369		$	759		$	559		$	8,561
	Loans collectively evaluated for impairment	123,747			387,875			260,758			156,286			244,791			169,255			1,342,712
	Total ending loan balance	$	125,219		$	390,499		$	262,536		$	157,655		$	245,550		$	169,814		$	1,351,273
Summary of loans by credit quality indicators	'
	The following table sets forth loans by credit quality indicator for the periods presented (in thousands):
		June 30, 2014
		Pass			Pass Watch			Special Mention			Substandard			Doubtful			Total
	Real Estate Loans:
	Construction	$	158,774		$	1,746		$	1,401		$	2,694		$	53		$	164,668
	1-4 Family Residential	381,530			1,476			1,733			6,231			705			391,675
	Other	259,575			3,873			2,617			5,783			10			271,858
	Commercial Loans	135,174			14,534			—			6,889			296			156,893
	Municipal Loans	238,874			—			—			1,009			—			239,883
	Loans to Individuals	165,609			28			—			493			178			166,308
	Total	$	1,339,536		$	21,657		$	5,751		$	23,099		$	1,242		$	1,391,285
		December 31, 2013
		Pass			Pass Watch			Special Mention			Substandard			Doubtful			Total
	Real Estate Loans:
	Construction	$	121,280		$	—		$	1,419		$	2,454		$	66		$	125,219
	1-4 Family Residential	380,741			1,626			3,025			4,901			206			390,499
	Other	249,381			2,553			4,698			5,887			17			262,536
	Commercial Loans	150,683			836			9			5,826			301			157,655
	Municipal Loans	244,505			—			—			1,045			—			245,550
	Loans to Individuals	168,764			27			2			719			302			169,814
	Total	$	1,315,354		$	5,042		$	9,153		$	20,832		$	892		$	1,351,273
Summary of nonperforming assets for the period	'
	The following table sets forth nonperforming assets for the periods presented (in thousands):
		At			At
		June 30,			December 31,
		2014			2013
	Nonaccrual loans	$	9,620		$	8,088
	Accruing loans past due more than 90 days	4			3
	Restructured loans	4,036			3,888
	Other real estate owned	383			726
	Repossessed assets	492			901
	Total Nonperforming Assets	$	14,535		$	13,606
Recorded investment in nonaccrual and accruing loans past due more than 90 days by class of loans	'
	The following table sets forth the recorded investment in nonaccrual and accruing loans past due more than 90 days by class of loans for the periods presented (in thousands):
		June 30, 2014						December 31, 2013
		Nonaccrual			Accruing Loans Past Due More Than 90 Days			Nonaccrual			Accruing Loans Past Due More Than 90 Days
	Real Estate Loans:
	Construction	$	2,067		$	—		$	1,472		$	—
	1-4 Family Residential	2,566			—			1,435			—
	Other	2,431			—			599			—
	Commercial Loans	513			—			1,062			—
	Loans to Individuals	2,043			4			3,520			3
	Total	$	9,620		$	4		$	8,088		$	3
Aging of recorded investment in past due loans by class of loans	'
	The following tables present the aging of the recorded investment in past due loans by class of loans (in thousands):
		June 30, 2014
		30-59 Days			60-89 Days			Greater than 90 Days Past Due			Total Past			Current			Total
		Past Due			Past Due						Due
	Real Estate Loans:
	Construction	$	—		$	—		$	2,067		$	2,067		$	162,601		$	164,668
	1-4 Family Residential	40			559			2,566			3,165			388,510			391,675
	Other	990			197			2,431			3,618			268,240			271,858
	Commercial Loans	16			36			513			565			156,328			156,893
	Municipal Loans	—			—			—			—			239,883			239,883
	Loans to Individuals	6,705			2,440			2,047			11,192			155,116			166,308
	Total	$	7,751		$	3,232		$	9,624		$	20,607		$	1,370,678		$	1,391,285
		December 31, 2013
		30-59 Days Past Due			60-89 Days Past Due			Greater than 90 Days			Total Past			Current			Total
								Past Due			Due
	Real Estate Loans:
	Construction	$	311		$	—		$	1,472		$	1,783		$	123,436		$	125,219
	1-4 Family Residential	4,340			781			1,435			6,556			383,943			390,499
	Other	2,652			—			599			3,251			259,285			262,536
	Commercial Loans	411			22			1,062			1,495			156,160			157,655
	Municipal Loans	—			—			—			—			245,550			245,550
	Loans to Individuals	7,241			2,590			3,523			13,354			156,460			169,814
	Total	$	14,955		$	3,393		$	8,091		$	26,439		$	1,324,834		$	1,351,273
Average recorded investment and interest income on impaired loans	'
	The following table sets forth interest income recognized on nonaccrual and restructured loans by class of loans for the periods presented. Average recorded investment is reported on a year-to-date basis (in thousands):
		Six Months Ended
		June 30, 2014									June 30, 2013
		Average Recorded Investment			Interest Income Recognized			Accruing			Average			Interest Income Recognized			Accruing Interest at Original Contracted Rate
								Interest at			Recorded
								Original			Investment
								Contracted Rate
	Real Estate Loans:
	Construction	$	1,578		$	11		$	69		$	1,919		$	3		$	82
	1-4 Family Residential	2,982			65			110			3,121			20			82
	Other	2,362			75			81			2,159			28			78
	Commercial Loans	1,446			19			37			1,979			6			57
	Municipal Loans	759			21			21			—			—			—
	Loans to Individuals	2,679			103			235			3,030			150			300
	Total	$	11,806		$	294		$	553		$	12,208		$	207		$	599
		Three Months Ended
		June 30, 2014									June 30, 2013
		Average Recorded Investment			Interest Income Recognized			Accruing			Average			Interest Income Recognized			Accruing
								Interest at			Recorded						Interest
								Original			Investment						at Original
								Contracted Rate									Contracted Rate
	Real Estate Loans:
	Construction	$	1,643		$	9		$	35		$	1,551		$	2		$	41
	1-4 Family residential	3,418			21			55			3,238			5			42
	Other	2,838			22			40			1,900			10			39
	Commercial loans	1,444			12			18			1,914			1			28
	Municipal loans	759			21			21			—			—			—
	Loans to individuals	2,144			23			146			2,689			54			162
	Total	$	12,246		$	108		$	315		$	11,292		$	72		$	312
Summary of impaired loans by class of loans for the period	'
	The following table sets forth impaired loans by class of loans for the periods presented (in thousands):
		June 30, 2014
		Unpaid Contractual Principal Balance			Recorded Investment With No Allowance			Recorded Investment With Allowance			Total Recorded Investment			Related
														Allowance for
														Loan Losses
	Real Estate Loans:
	Construction	$	2,743		$	—		$	2,067		$	2,067		$	113
	1-4 Family Residential	4,106			—			3,991			3,991			226
	Other	3,577			—			3,567			3,567			160
	Commercial Loans	1,236			—			1,087			1,087			372
	Municipal Loans	759			—			759			759			15
	Loans to Individuals	2,368			—			2,155			2,155			1,048
	Total	$	14,789		$	—		$	13,626		$	13,626		$	1,934
		December 31, 2013
		Unpaid			Recorded			Recorded			Total			Related
		Contractual			Investment			Investment			Recorded			Allowance for
		Principal			With No			With			Investment			Loan Losses
		Balance			Allowance			Allowance
	Real Estate Loans:
	Construction	$	2,629		$	—		$	1,472		$	1,472		$	103
	1-4 Family Residential	2,748			—			2,624			2,624			161
	Other	1,800			—			1,778			1,778			73
	Commercial Loans	1,606			—			1,369			1,369			240
	Municipal Loans	759			—			759			759			15
	Loans to Individuals	4,280			—			3,943			3,943			1,950
	Total	$	13,822		$	—		$	11,945		$	11,945		$	2,542
Schedule of recorded investment in loans modified	'
	The following tables set forth the recorded investment in TDRs for the periods presented (dollars in thousands):
		Six Months Ended June 30, 2014
		Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
		Period
	Real Estate Loans:
	1-4 Family Residential	$	—		$	284		$	—		$	284		1
	Other	—			—			413			413			2
	Commercial Loans	313			—			56			369			5
	Loans to Individuals	—			15			45			60			4
	Total	$	313		$	299		$	514		$	1,126		12
		Three Months Ended June 30, 2014
		Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
		Period
	Real Estate Loans:
	1-4 Family Residential	$	—		$	—		$	—		$	—		—
	Other	—			—			388			388			1
	Commercial Loans	60			—			—			60			2
	Loans to Individuals	—			—			—			—			—
	Total	$	60		$	—		$	388		$	448		3
		Six Months Ended June 30, 2013
		Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
		Period
	Real Estate Loans:
	Construction	$	40		$	—		$	—		$	40		1
	1-4 Family Residential	285			—			468			753			6
	Other	—			—			16			16			1
	Commercial Loans	307			—			19			326			5
	Loans to Individuals	14			185			35			234			32
	Total	$	646		$	185		$	538		$	1,369		45
		Three Months Ended June 30, 2013
		Extend Amortization			Interest Rate Reductions			Combination (1)			Total Modifications			Number of Loans
		Period
	Real Estate Loans:
	1-4 Family Residential	$	—		$	—		$	391		$	391		2
	Other	—			—			16			16			1
	Commercial Loans	22			—			—			22			1
	Loans to Individuals	14			185			28			227			30
	Total	$	36		$	185		$	435		$	656		34
	(1) These modifications include an extension of the amortization period and interest rate reduction.

Longterm_Obligations_Tables

Long-term Obligations (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Summary of long-term obligation	'
	Long-term obligations are summarized as follows (in thousands):
		June 30,		31-Dec-13
		2014
	FHLB Advances (1)	$	505,710	$	499,349
	Long-term Debt (2)
	Southside Statutory Trust III Due 2033 (3)	20,619		20,619
	Southside Statutory Trust IV Due 2037 (4)	23,196		23,196
	Southside Statutory Trust V Due 2037 (5)	12,887		12,887
	Magnolia Trust Company I Due 2035 (6)	3,609		3,609
	Total Long-term Debt	60,311		60,311
	Total Long-term Obligations	$	566,021	$	559,660
	-1	At June 30, 2014, the weighted average cost of these advances was 1.44%.  Long-term FHLB Advances have maturities ranging from July 2015 through July 2028.
	-2	This long-term debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.
	-3	This debt carries an adjustable rate of 3.1741% through September 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 294 basis points.
	-4	This debt carries an adjustable rate of 1.52485% through July 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 130 basis points.
	-5	This debt carries an adjustable rate of 2.4806% through September 14, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 225 basis points.
	-6	This debt carries an adjustable rate of 2.02735% through August 22, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 180 basis points.

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]	'
The components of net periodic benefit cost	'
	The components of net periodic benefit cost are as follows (in thousands):
		Six Months Ended June 30,
		Defined Benefit						Restoration
		Pension Plan						Plan
		2014			2013			2014		2013
	Service cost	$	849		$	1,059		$	137	$	149
	Interest cost	1,748			1,577			281		234
	Expected return on assets	(2,824		)	(2,397		)	—		—
	Net actuarial loss recognition	272			1,099			249		295
	Prior service (credit) cost amortization	(10		)	(21		)	3		(1		)
	Net periodic benefit cost	$	35		$	1,317		$	670	$	677
		Three Months Ended June 30,
		Defined Benefit						Restoration
		Pension Plan						Plan
		2014			2013			2014		2013
	Service cost	$	401		$	503		$	68	$	98
	Interest cost	876			792			145		135
	Expected return on assets	(1,412		)	(1,199		)	—		—
	Net loss recognition	141			554			148		197
	Prior service credit amortization	(6		)	(10		)	2		(1		)
	Net periodic benefit cost	$	—		$	640		$	363	$	429

Sharebased_Incentive_Plans_Tab

Share-based Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of activity in share-based plans	'
	The following table presents activity related to our RSUs and NQSOs as of June 30, 2014.
				Restricted Stock Units							Stock Options
				Outstanding							Outstanding
		Shares		Number			Weighted-				Number			Weighted-		Weighted-
		Available		of Shares			Average				of Shares			Average		Average
		for Grant					Grant-Date							Exercise		Grant-Date
							Fair Value							Price		Fair Value
	Balance, January 1, 2014	738,764		56,823			$	22			501,846			$	20.56	$	6.18
	Granted	—		—			—				—			—		—
	Stock options exercised	—		—			—				(4,949	)		17.29		5.13
	Stock awards vested	—		(6,525	)		16.58				—			—		—
	Forfeited	16,988		(2,901	)		22.11				(14,087	)		22.3		6.69
	Canceled/expired	1,898		—			—				(1,898	)		18.99		5.27
	Balance, June 30, 2014	757,650		47,397			$	22.73			480,912			$	20.55	$	6.18
Other information regarding options outstanding and exercisable	'
	Other information regarding options outstanding and exercisable as of June 30, 2014 is as follows:
						Options Outstanding									Options Exercisable
	Range of Exercise Prices					Number			Weighted-				Weighted-		Number	Weighted-
						of Shares			Average				Average Remaining		of Shares	Average
									Exercise				Contractual			Exercise
									Price				Life in Years			Price
	$	16.58	-	$25.85		480,912			$	20.55			8.2		171,902	$	17.37
	Total					480,912			$	20.55			8.2		171,902	$	17.37

Fair_Value_Measurement_Tables

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Summary of fair value measurement on recurring and nonrecurring basis segregated by level of valuation inputs within fair value hierarchy utilized to measure fair value	'
	The following tables summarize assets measured at fair value on a recurring and nonrecurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (in thousands):
		At or For the Six Months Ended June 30, 2014
					Fair Value Measurements at the End of the Reporting Period Using
		Carrying			Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs		Significant Unobservable Inputs		Total Gains
		Amount			(Level 1)				(Level 2)		(Level 3)		(Losses)
	Recurring fair value measurements
	Investment Securities:
	U. S. Treasuries	$	29,406		$	29,406			$	—	$	—	$	—
	State and Political Subdivisions	309,231			—				309,231		—		—
	Other Stocks and Bonds	13,271			—				13,271		—		—
	Mortgage-backed Securities: (1)
	Residential	652,061			—				652,061		—		—
	Commercial	99,679			—				99,679		—		—
	Total recurring fair value measurements	$	1,103,648		$	29,406			$	1,074,242	$	—	$	—
	Nonrecurring fair value measurements
	Foreclosed assets (2)	$	875		$	—			$	—	$	875	$	—
	Impaired loans (3)	11,692			—				—		11,692		(22		)
	Total nonrecurring fair value measurements	$	12,567		$	—			$	—	$	12,567	$	(22	)
		At or For the Year Ended December 31, 2013
					Fair Value Measurements at the End of the Reporting Period Using
		Carrying			Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs		Significant Unobservable Inputs		Total Gains
		Amount			(Level 1)				(Level 2)		(Level 3)		(Losses)
	Recurring fair value measurements
	Investment Securities:
	U.S. Government Agency Debentures	$	10,129		$	—			$	10,129	$	—	$	—
	State and Political Subdivisions	314,074			—				314,074		—		—
	Other Stocks and Bonds	13,226			—				13,226		—		—
	Mortgage-backed Securities: (1)
	Residential	772,085			—				772,085		—		—
	Commercial	68,173			—				68,173		—		—
	Total recurring fair value measurements	$	1,177,687		$	—			$	1,177,687	$	—	$	—
	Nonrecurring fair value measurements
	Foreclosed assets (2)	$	1,627		$	—			$	—	$	1,627	$	(485	)
	Impaired loans (3)	9,403			—				—		9,403		(64		)
	Total nonrecurring fair value measurements	$	11,030		$	—			$	—	$	11,030	$	(549	)
	-1	All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
	-2	Losses represent related losses on foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.
	-3	Loans represent collateral dependent impaired loans with a specific valuation allowance.  Losses on these loans represent charge-offs which are netted against the allowance for loan losses.
Financial assets and liabilities measured at fair value on a recurring basis with utilized level 3 inputs to determine fair value	'
	For the periods prior to the TRUPs sale in December 2013, the following table presents additional information about the TRUPs measured at fair value on a recurring basis and for which we utilized Level 3 inputs to determine fair value (in thousands):
			Three Months Ended			Six Months Ended
			June 30,			June 30,
			2013			2013
	TRUPs
	Balance at Beginning of Period		$	592		$	990
	Total gains or losses (realized/unrealized):
	Included in earnings		—			(42		)
	Included in other comprehensive income (loss)		552			196
	Purchases		—			—
	Issuances		—			—
	Settlements		—			—
	Transfers in and/or out of Level 3		—			—
	Balance at End of Period		$	1,144		$	1,144
	The amount of total gains or losses for the periods included in earnings attributable to the change in unrealized gains or losses relating to assets still held at reporting date		$	—		$	(42	)
Financial assets, financial liabilities, and unrecognized financial instruments at carrying amount and fair value	'
	The following tables present our financial assets, financial liabilities, and unrecognized financial instruments measured on a nonrecurring basis at both their respective carrying amounts and fair value (in thousands):
					Estimated Fair Value
	June 30, 2014	Carrying			Total				Level 1		Level 2		Level 3
		Amount
	Financial Assets:
	Cash and cash equivalents	$	154,423		$	154,423			$	154,423	$	—	$	—
	Investment securities:
	Held to maturity, at carrying value	390,221			394,638				—		394,638		—
	Mortgage-backed securities:
	Held to maturity, at carrying value	260,659			266,185				—		266,185		—
	FHLB stock and other investments, at cost	27,576			27,576				—		27,576		—
	Loans, net of allowance for loan losses	1,372,877			1,349,385				—		—		1,349,385
	Loans held for sale	755			755				—		755		—
	Financial Liabilities:
	Retail deposits	$	2,601,478		$	2,600,319			$	—	$	2,600,319	$	—
	Federal funds purchased and repurchase agreements	2,057			2,057				—		2,057		—
	FHLB advances	514,123			503,535				—		503,535		—
	Long-term debt	60,311			43,742				—		43,742		—
					Estimated Fair Value
	December 31, 2013	Carrying			Total				Level 1		Level 2		Level 3
		Amount
	Financial Assets:
	Cash and cash equivalents	$	54,431		$	54,431			$	54,431	$	—	$	—
	Investment securities:
	Held to maturity, at carrying value	391,552			377,383				—		377,383		—
	Mortgage-backed securities:
	Held to maturity, at carrying value	275,569			271,836				—		271,836		—
	FHLB stock and other investments, at cost	36,130			36,130				—		36,130		—
	Loans, net of allowance for loan losses	1,332,396			1,306,524				—		—		1,306,524
	Loans held for sale	151			151				—		151		—
	Financial Liabilities:
	Retail deposits	$	2,527,808		$	2,526,143			$	—	$	2,526,143	$	—
	Federal funds purchased and repurchase agreements	859			859				—		859		—
	FHLB advances	572,794			559,648				—		559,648		—
	Long-term debt	60,311			43,476				—		43,476		—

Income_Taxes_Income_Taxes_Tabl

Income Taxes Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	The provision for income taxes included in the accompanying statements of income consist of the following (in thousands):
		Three Months Ended June 30,						Six Months Ended
								June 30,
		2014			2013			2014			2013
	Current tax provision	$	1,342		$	1,895		$	3,358		$	2,711
	Deferred tax (benefit) provision	(504		)	(183		)	(1,361		)	848
	Provision for tax expense charged to operations	$	838		$	1,712		$	1,997		$	3,559
	Net deferred tax assets totaled $12.7 million at June 30, 2014 and $18.4 million at December 31, 2013. The decrease in net deferred tax assets resulted primarily from a decrease in unrealized losses on securities available for sale, partially offset by an increase in the alternative minimum tax. No valuation allowance for deferred tax assets was recorded at June 30, 2014 or December 31, 2013, as management believes it is more likely than not that all of the deferred tax assets will be realized because they are supported by recoverable taxes paid in prior years. There was approximately $50,000 in unrecognized tax benefits at June 30, 2014.
	We recognized income tax expense of $838,000 and $2.0 million, for an effective tax rate of 7.4% and 9.7% for the three and six months ended June 30, 2014, respectively, compared to $1.7 million and $3.6 million, for an effective tax rate of 13.4% and 15.0% for the three and six months ended June 30, 2013, respectively. The effective tax rate differed from the U.S. statutory rate of 35% during the comparable periods primarily due to the effect of tax-exempt interest from loans, securities and bank owned life insurance. The lower effective tax rate for the three and six months ended June 30, 2014 was due to an increase in tax-exempt income as a percentage of taxable income as compared to the same periods in 2013.
	We file income tax returns in the U.S. federal jurisdiction and in certain states. We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2010.

OffBalanceSheet_Arrangements_C1

Off-Balance-Sheet Arrangements, Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Scheduled maturities of unused commitments	'
	The scheduled maturities of unused commitments were as follows (in thousands):
		At		At
		June 30,		December 31,
		2014		2013
	Unused commitments:
	Due in one year or less	$	133,385	$	110,210
	Due after one year	59,031		46,032
	Total	$	192,416	$	156,242

Basis_of_Presentation_Stock_Di

Basis of Presentation - Stock Dividend Percentage (Details)	0 Months Ended	6 Months Ended
	Mar. 20, 2014	Jun. 30, 2014	Jun. 30, 2013
		Rate	Rate
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'	'
Stock dividends, percentage of common stock	5.00%	5.00%	5.00%

Pending_Acquisitions_Pending_A1

Pending Acquisitions - Pending Acquisitions (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Apr. 28, 2014	Jun. 30, 2014
In Thousands, except Share data, unless otherwise specified			OmniAmerican Bancorp, Inc. [Member]	OmniAmerican Bancorp, Inc. [Member]
Business Acquisition [Line Items]	'	'	'	'
Assets	$3,498,662	$3,445,663	'	$1,400,000
Noncash or Part Noncash Acquisition, Company Stock Consideration, Per Each Share of Acquiree Stock, Shares Issued	'	'	0.4459	'
Noncash or Part Noncash Acquisition, Cash Consideration, Per Each Share of Acquiree Stock	'	'	$13.13	'

Earnings_Per_Share_Earnings_Pe

Earnings Per Share - Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic and Diluted Earnings:	'	'	'	'
Net income	$10,457	$11,068	$18,681	$20,110
Basic weighted-average shares outstanding	18,832,000	18,744,000	18,825,000	18,748,000
Add: Stock options	93,000	34,000	89,000	28,000
Diluted weighted-average shares outstanding	18,925,000	18,778,000	18,914,000	18,776,000
Basic Earnings Per Share:	'	'	'	'
Earnings per common share - basic (in dollars per share)	$0.55	$0.59	$0.99	$1.07
Diluted Earnings Per Share:	'	'	'	'
Earnings per common share - diluted (in dollars per share)	$0.55	$0.59	$0.99	$1.07
Antidilutive securities from non-qualified stock options excluded from calculating earnings	'	'	'	'
Number of antidilutive options (in shares)	18,000	10,000	21,000	18,000

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive (Loss) Income - Accumulated Other Comprehensive Income, Changes In (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income by Component, Changes [Line Items]	'	'	'	'
Beginning balance, net of tax	($14,209)	($3,188)	($21,037)	$2,938
Other comprehensive income (loss) before reclassifications	8,586	-38,508	18,873	-44,262
Reclassified to income	-213	-4,261	5	-7,932
Income tax benefit (expense)	-2,930	14,969	-6,607	18,268
Net current-period other comprehensive (loss) income, net of tax	5,443	-27,800	12,271	-33,926
Ending balance, net of tax	-8,766	-30,988	-8,766	-30,988
Net other unrealized investment gain (loss)	'	'	'	'
Accumulated Other Comprehensive Income by Component, Changes [Line Items]	'	'	'	'
Beginning balance, net of tax	-1,977	24,194	-8,656	30,500
Other comprehensive income (loss) before reclassifications	8,586	-39,060	18,873	-44,416
Reclassified to income	-498	-5,001	-509	-9,346
Income tax benefit (expense)	-2,830	15,421	-6,427	18,816
Net current-period other comprehensive (loss) income, net of tax	5,258	-28,640	11,937	-34,946
Ending balance, net of tax	3,281	-4,446	3,281	-4,446
Other-than-Temporary Impairment	'	'	'	'
Accumulated Other Comprehensive Income by Component, Changes [Line Items]	'	'	'	'
Beginning balance, net of tax	0	-1,371	0	-1,140
Other comprehensive income (loss) before reclassifications	0	552	0	154
Reclassified to income	0	0	0	42
Income tax benefit (expense)	0	-193	0	-68
Net current-period other comprehensive (loss) income, net of tax	0	359	0	128
Ending balance, net of tax	0	-1,012	0	-1,012
Net Prior Service Cost (Credit)	'	'	'	'
Accumulated Other Comprehensive Income by Component, Changes [Line Items]	'	'	'	'
Beginning balance, net of tax	-14	241	-12	248
Other comprehensive income (loss) before reclassifications	0	0	0	0
Reclassified to income	-4	-11	-7	-22
Income tax benefit (expense)	1	4	2	8
Net current-period other comprehensive (loss) income, net of tax	-3	-7	-5	-14
Ending balance, net of tax	-17	234	-17	234
Net Unamortized Gain (Loss)	'	'	'	'
Accumulated Other Comprehensive Income by Component, Changes [Line Items]	'	'	'	'
Beginning balance, net of tax	-12,218	-26,252	-12,369	-26,670
Other comprehensive income (loss) before reclassifications	0	0	0	0
Reclassified to income	289	751	521	1,394
Income tax benefit (expense)	-101	-263	-182	-488
Net current-period other comprehensive (loss) income, net of tax	188	488	339	906
Ending balance, net of tax	($12,030)	($25,764)	($12,030)	($25,764)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive (Loss) Income - Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Realized (loss) gain on sale of securities	$498		$5,001		$509		$9,346
Impairment losses	0		0		0		-42
Net Loss	289		751		521		1,394
Prior service credit	-4		-11		-7		-22
Income before income tax expense	11,295		12,780		20,678		23,669
Tax benefit (expense)	-838		-1,712		-1,997		-3,559
Net income	10,457		11,068		18,681		20,110
Reclassification out of accumulated other comprehensive income	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Net income	139		2,770		-3		5,156
Reclassification out of accumulated other comprehensive income | Net other unrealized investment gain (loss)	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Realized (loss) gain on sale of securities	498	[1]	5,001	[1]	509	[1]	9,346	[1]
Impairment losses	0	[2]	0	[2]	0	[2]	-42	[2]
Income before income tax expense	498		5,001		509		9,304
Tax benefit (expense)	-174		-1,750		-178		-3,256
Net income	324		3,251		331		6,048
Reclassification out of accumulated other comprehensive income | Accumulated defined benefit plans adjustment	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Net Loss	-289	[3]	-751	[3]	-521	[3]	-1,394	[3]
Prior service credit	4	[3]	11	[3]	7	[3]	22	[3]
Income before income tax expense	-285		-740		-514		-1,372
Tax benefit (expense)	100		259		180		480
Net income	($185)		($481)		($334)		($892)
[1]	Listed as Net gain on sale of securities available for sale on the Statements of Income.
[2]	Listed as Net impairment losses recognized in earnings on the Statements of Income.
[3]	These accumulated other comprehensive income components are included in the computation of net periodic benefit cost presented in “Note 8 - Employee Benefit Plans.”

Securities_Schedule_of_Debt_an

Securities - Schedule of Debt and Equity Securities Components (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
AVAILABLE FOR SALE	'		'
Amortized cost	$1,086,918,000		$1,178,778,000
Gross unrealized gains, OCI	22,184,000		19,856,000
Gross unrealized losses, OCI	5,454,000		20,947,000
Estimated fair value	1,103,648,000		1,177,687,000
HELD TO MATURITY	'		'
Amortized cost	662,561,000		679,345,000
Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income	5,554,000		5,925,000
Held To Maturity Securities Gross Unrealized Losses Recognized in OCI	17,235,000		18,149,000
Carrying value	650,880,000		667,121,000
Gross unrealized gains	-14,345,000		-5,130,000
Gross unrealized losses	4,402,000		23,032,000
Estimated fair value	660,823,000		649,219,000
US Treasury	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	29,388,000		0
Gross unrealized gains, OCI	74,000		0
Gross unrealized losses, OCI	56,000		0
Estimated fair value	29,406,000		0
US Government Agency Debentures	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	0		11,612,000
Gross unrealized gains, OCI	0		0
Gross unrealized losses, OCI	0		1,483,000
Estimated fair value	0		10,129,000
State and Political Subdivisions	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	306,164,000		322,412,000
Gross unrealized gains, OCI	6,505,000		4,537,000
Gross unrealized losses, OCI	3,438,000		12,875,000
Estimated fair value	309,231,000		314,074,000
HELD TO MATURITY	'		'
Amortized cost	395,077,000		396,549,000
Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income	5,554,000		5,925,000
Held To Maturity Securities Gross Unrealized Losses Recognized in OCI	10,410,000		10,922,000
Carrying value	390,221,000		391,552,000
Gross unrealized gains	-6,895,000		-1,207,000
Gross unrealized losses	2,478,000		15,376,000
Estimated fair value	394,638,000		377,383,000
Other Stocks and Bonds	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	13,080,000		13,074,000
Gross unrealized gains, OCI	191,000		159,000
Gross unrealized losses, OCI	0		7,000
Estimated fair value	13,271,000		13,226,000
Residential MBS	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	639,149,000	[1]	760,418,000	[1]
Gross unrealized gains, OCI	14,396,000	[1]	14,940,000	[1]
Gross unrealized losses, OCI	1,484,000	[1]	3,273,000	[1]
Estimated fair value	652,061,000	[1]	772,085,000	[1]
HELD TO MATURITY	'		'
Amortized cost	59,335,000	[1]	74,129,000	[1]
Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income	0	[1]	0	[1]
Held To Maturity Securities Gross Unrealized Losses Recognized in OCI	84,000	[1]	99,000	[1]
Carrying value	59,251,000	[1]	74,030,000	[1]
Gross unrealized gains	-3,515,000	[1]	-3,923,000	[1]
Gross unrealized losses	0	[1]	0	[1]
Estimated fair value	62,766,000	[1]	77,953,000	[1]
Commercial MBS	'		'
AVAILABLE FOR SALE	'		'
Amortized cost	99,137,000	[1]	71,262,000	[1]
Gross unrealized gains, OCI	1,018,000	[1]	220,000	[1]
Gross unrealized losses, OCI	476,000	[1]	3,309,000	[1]
Estimated fair value	99,679,000	[1]	68,173,000	[1]
HELD TO MATURITY	'		'
Amortized cost	208,149,000	[1]	208,667,000	[1]
Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income	0	[1]	0	[1]
Held To Maturity Securities Gross Unrealized Losses Recognized in OCI	6,741,000	[1]	7,128,000	[1]
Carrying value	201,408,000	[1]	201,539,000	[1]
Gross unrealized gains	-3,935,000	[1]	0	[1]
Gross unrealized losses	1,924,000	[1]	7,656,000	[1]
Estimated fair value	$203,419,000	[1]	$193,883,000	[1]
[1]	All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

Securities_Unrealized_Loss_on_

Securities - Unrealized Loss on Securities (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	$22,184,000		$19,856,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	128,151,000		386,480,000
More than 12 months, fair value	192,173,000		29,888,000
Total fair value	320,324,000		416,368,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	717,000		18,339,000
More than 12 months, unrealized loss	4,737,000		2,608,000
Total unrealized loss	5,454,000		20,947,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	61,771,000		477,550,000
More than 12 months, fair value	230,999,000		1,705,000
Total fair value	292,770,000		479,255,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	320,000		22,967,000
More than 12 months, unrealized loss	4,082,000		65,000
Total unrealized loss	4,402,000		23,032,000
Gross unrealized losses, OCI	5,454,000		20,947,000
US Treasury	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	74,000		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	14,622,000		'
More than 12 months, fair value	0		'
Total fair value	14,622,000		'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	56,000		'
More than 12 months, unrealized loss	0		'
Total unrealized loss	56,000		'
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Gross unrealized losses, OCI	56,000		0
US Government Agency Debentures	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	'		0
More than 12 months, fair value	'		10,129,000
Total fair value	'		10,129,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	'		0
More than 12 months, unrealized loss	'		1,483,000
Total unrealized loss	'		1,483,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Gross unrealized losses, OCI	0		1,483,000
State and Political Subdivisions	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	6,505,000		4,537,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	52,132,000		191,117,000
More than 12 months, fair value	118,123,000		18,408,000
Total fair value	170,255,000		209,525,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	424,000		11,757,000
More than 12 months, unrealized loss	3,014,000		1,118,000
Total unrealized loss	3,438,000		12,875,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	61,771,000		283,667,000
More than 12 months, fair value	130,419,000		1,705,000
Total fair value	192,190,000		285,372,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	320,000		15,311,000
More than 12 months, unrealized loss	2,158,000		65,000
Total unrealized loss	2,478,000		15,376,000
Gross unrealized losses, OCI	3,438,000		12,875,000
Other Stocks and Bonds	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	191,000		159,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	'		2,992,000
More than 12 months, fair value	'		0
Total fair value	'		2,992,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	'		7,000
More than 12 months, unrealized loss	'		0
Total unrealized loss	'		7,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Gross unrealized losses, OCI	0		7,000
Residential MBS	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	14,396,000	[1]	14,940,000	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	55,955,000		126,965,000
More than 12 months, fair value	47,083,000		1,351,000
Total fair value	103,038,000		128,316,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	224,000		3,266,000
More than 12 months, unrealized loss	1,260,000		7,000
Total unrealized loss	1,484,000		3,273,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Gross unrealized losses, OCI	1,484,000	[1]	3,273,000	[1]
Commercial MBS	'		'
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]	'		'
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1,018,000	[1]	220,000	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	5,442,000		65,406,000
More than 12 months, fair value	26,967,000		0
Total fair value	32,409,000		65,406,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	13,000		3,309,000
More than 12 months, unrealized loss	463,000		0
Total unrealized loss	476,000		3,309,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'
Less than 12 months, fair value	0		193,883,000
More than 12 months, fair value	100,580,000		0
Total fair value	100,580,000		193,883,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'
Less than 12 months, unrealized loss	0		7,656,000
More than 12 months, unrealized loss	1,924,000		0
Total unrealized loss	1,924,000		7,656,000
Gross unrealized losses, OCI	$476,000	[1]	$3,309,000	[1]
[1]	All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

Securities_Other_Than_Temporar

Securities - Other Than Temporary Impairment (Details) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	'	'
Balance, beginning of the period	$3,298	$3,256
Additions for credit losses recognized on debt securities that had previously incurred impairment losses	0	42
Balance, end of the period	$3,298	$3,298

Securities_Interest_Income_on_

Securities - Interest Income on Securities (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income recognized on securities [Abstract]	'	'	'	'
U.S. Treasury	$41	$0	$41	$17
U.S. Government Agency Debentures	41	93	100	305
State and Political Subdivisions	6,031	5,929	12,001	10,507
Other Stocks and Bonds	51	54	103	99
Mortgage-backed Securities	7,557	4,680	15,239	8,616
Total interest income on securities	$13,721	$10,756	$27,484	$19,544

Securities_Amortized_Cost_and_

Securities - Amortized Cost and Estimated Fair Value of Investments in Debt Securities by Contractual Maturity (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities, Amortized Cost Basis [Abstract]	'	'
Due in one year or less	$3,410	'
Due after one year through five years	18,990	'
Due after five years through ten years	63,009	'
Due after ten years	263,223	'
Total available-for-sale investment securities, amortized cost	348,632	'
Mortgage-backed Securities:	738,286	'
Total	1,086,918	'
Available-for-sale Securities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Due in one year or less	3,456	'
Due after one year through five years	19,509	'
Due after five years through ten years	63,789	'
Due after ten years	265,154	'
Total available-for-sale investment securities	351,908	'
Mortgage-backed Securities:	751,740	'
Total	1,103,648	1,177,687
Held to Maturity Securities, Amortized Amount [Abstract]	'	'
Due in one year or less	0	'
Due after one year through five years	329	'
Due after five years through ten years	18,741	'
Due after ten years	371,151	'
Total held-to-maturity investment securities	390,221	'
Mortgage-backed securities	260,659	'
Carrying value	650,880	667,121
Held to Maturity Securities, Fair Value [Abstract]	'	'
Due in one year or less	0	'
Due after one year through five years	331	'
Due after five years through ten years	18,739	'
Due after ten years	375,568	'
Total held-to-maturity investment securities	394,638	'
Mortgage-backed Securities:	266,185	'
Total	$660,823	'

Securities_Narrative_Details

Securities - Narrative (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 13, 2013
Trust Preferred Securities [Abstract]	'	'	'	'
Writedown Carry Amount Pooled Trust Preferred Securities Recognized In Earnings	'	$42,000	'	'
Trust Preferred Securities, Amortized Cost	'	'	'	2,700,000
Available for sale securities, TRUPS, Net Realized Gain (Loss) on Sale	'	'	-959,000	'
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]	'	'	'	'
Available-for-sale Securities, Gross Realized Gain (Loss)	509,000	9,300,000	'	'
Available-for-sale Securities, Gross Realized Gains	4,600,000	10,700,000	'	'
Available-for-sale Securities, Gross Realized Losses	4,100,000	1,400,000	'	'
Held-to-maturity Securities, Other Disclosure Items [Abstract]	'	'	'	'
Proceeds from sale of held-to-maturity securities	0	'	0	'
Pledged Financial Instruments, Not Separately Reported, Securities	$976,600,000	'	$1,140,000,000	'

Loans_and_Allowance_for_Probab2

Loans and Allowance for Probable Loan Losses - Loans by Portfolio Segment (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	$1,391,285	$1,351,273
Less: Allowance for loan losses	18,408	18,877
Net loans	1,372,877	1,332,396
Construction	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	164,668	125,219
1-4 Family Residential	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	391,675	390,499
Other	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	271,858	262,536
Commercial Loans	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	156,893	157,655
Municipal Loans	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	239,883	245,550
Loans to Individuals	'	'
Loans and Leases Receivable Disclosure [Abstract]	'	'
Total ending loans balance	$166,308	$169,814

Loans_and_Allowance_for_Probab3

Loans and Allowance for Probable Loan Losses - Allowance for Loan Losses Activity by Portfolio Segment (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	$18,787	$18,542	$18,877	$20,585
Provision (reversal) for loan losses	2,650	2,021	6,783	2,513
Loans charged off	-3,546	-2,705	-8,314	-5,857
Recoveries of loans charged off	517	512	1,062	1,129
Balance at end of period	18,408	18,370	18,408	18,370
Construction	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	2,130	2,247	2,142	2,355
Provision (reversal) for loan losses	319	-152	309	-277
Loans charged off	0	0	-14	0
Recoveries of loans charged off	47	5	59	22
Balance at end of period	2,496	2,100	2,496	2,100
1-4 Family Residential	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	3,797	3,488	3,277	3,545
Provision (reversal) for loan losses	92	114	628	281
Loans charged off	0	0	-22	-228
Recoveries of loans charged off	26	7	32	11
Balance at end of period	3,915	3,609	3,915	3,609
Other	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	2,411	2,002	2,572	2,290
Provision (reversal) for loan losses	24	118	-140	-129
Loans charged off	0	-21	0	-67
Recoveries of loans charged off	1	5	4	10
Balance at end of period	2,436	2,104	2,436	2,104
Commercial Loans	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	2,031	2,847	1,970	3,158
Provision (reversal) for loan losses	-322	-330	-319	-620
Loans charged off	-5	-127	-5	-198
Recoveries of loans charged off	53	60	111	110
Balance at end of period	1,757	2,450	1,757	2,450
Municipal Loans	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	777	621	668	633
Provision (reversal) for loan losses	-114	12	-5	0
Loans charged off	0	0	0	0
Recoveries of loans charged off	0	0	0	0
Balance at end of period	663	633	663	633
Loans to Individuals	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	7,641	6,451	8,248	7,373
Provision (reversal) for loan losses	2,651	2,572	6,310	3,916
Loans charged off	-3,541	-2,557	-8,273	-5,364
Recoveries of loans charged off	390	435	856	976
Balance at end of period	7,141	6,901	7,141	6,901
Unallocated	'	'	'	'
Change in Allowances for Loan Losses [Abstract]	'	'	'	'
Balance at beginning of period	0	886	0	1,231
Provision (reversal) for loan losses	0	-313	0	-658
Loans charged off	0	0	0	0
Recoveries of loans charged off	0	0	0	0
Balance at end of period	$0	$573	$0	$573

Loans_and_Allowance_for_Probab4

Loans and Allowance for Probable Loan Losses - Allowance Balance, by Impairment Method (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	$958	'	$765	'	'	'
Ending balance - collectively evaluated for impairment	17,450	'	18,112	'	'	'
Balance at end of period	18,408	18,787	18,877	18,370	18,542	20,585
Construction	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	113	'	103	'	'	'
Ending balance - collectively evaluated for impairment	2,383	'	2,039	'	'	'
Balance at end of period	2,496	2,130	2,142	2,100	2,247	2,355
1-4 Family Residential	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	226	'	161	'	'	'
Ending balance - collectively evaluated for impairment	3,689	'	3,116	'	'	'
Balance at end of period	3,915	3,797	3,277	3,609	3,488	3,545
Other	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	160	'	73	'	'	'
Ending balance - collectively evaluated for impairment	2,276	'	2,499	'	'	'
Balance at end of period	2,436	2,411	2,572	2,104	2,002	2,290
Commercial Loans	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	372	'	240	'	'	'
Ending balance - collectively evaluated for impairment	1,385	'	1,730	'	'	'
Balance at end of period	1,757	2,031	1,970	2,450	2,847	3,158
Municipal Loans	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	15	'	15	'	'	'
Ending balance - collectively evaluated for impairment	648	'	653	'	'	'
Balance at end of period	663	777	668	633	621	633
Loans to Individuals	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Ending balance - individually evaluated for impairment	72	'	173	'	'	'
Ending balance - collectively evaluated for impairment	7,069	'	8,075	'	'	'
Balance at end of period	7,141	7,641	8,248	6,901	6,451	7,373
Unallocated	'	'	'	'	'	'
Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items]	'	'	'	'	'	'
Balance at end of period	$0	$0	$0	$573	$886	$1,231

Loans_and_Allowance_for_Probab5

Loans and Allowance for Probable Loan Losses - Allowance for Loan Losses, Loan Portfolio, by Impairment Method (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	$11,818	$8,561
Loans collectively evaluated for impairment	1,379,467	1,342,712
Total ending loans balance	1,391,285	1,351,273
Construction	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	2,067	1,472
Loans collectively evaluated for impairment	162,601	123,747
Total ending loans balance	164,668	125,219
1-4 Family Residential	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	3,991	2,624
Loans collectively evaluated for impairment	387,684	387,875
Total ending loans balance	391,675	390,499
Other	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	3,567	1,778
Loans collectively evaluated for impairment	268,291	260,758
Total ending loans balance	271,858	262,536
Commercial Loans	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	1,087	1,369
Loans collectively evaluated for impairment	155,806	156,286
Total ending loans balance	156,893	157,655
Municipal Loans	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	759	759
Loans collectively evaluated for impairment	239,124	244,791
Total ending loans balance	239,883	245,550
Loans to Individuals	'	'
Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items]	'	'
Loans individually evaluated for impairment	347	559
Loans collectively evaluated for impairment	165,961	169,255
Total ending loans balance	$166,308	$169,814

Loans_and_Allowance_for_Probab6

Loans and Allowance for Probable Loan Losses - Loans by Credit Quality Indicator (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	$1,391,285	$1,351,273
Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	164,668	125,219
1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	391,675	390,499
Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	271,858	262,536
Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	156,893	157,655
Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	239,883	245,550
Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	166,308	169,814
Pass	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,339,536	1,315,354
Pass | Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	158,774	121,280
Pass | 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	381,530	380,741
Pass | Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	259,575	249,381
Pass | Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	135,174	150,683
Pass | Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	238,874	244,505
Pass | Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	165,609	168,764
Pass Watch	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	21,657	5,042
Pass Watch | Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,746	0
Pass Watch | 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,476	1,626
Pass Watch | Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	3,873	2,553
Pass Watch | Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	14,534	836
Pass Watch | Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	0	0
Pass Watch | Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	28	27
Special Mention	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	5,751	9,153
Special Mention | Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,401	1,419
Special Mention | 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,733	3,025
Special Mention | Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	2,617	4,698
Special Mention | Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	0	9
Special Mention | Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	0	0
Special Mention | Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	0	2
Substandard	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	23,099	20,832
Substandard | Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	2,694	2,454
Substandard | 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	6,231	4,901
Substandard | Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	5,783	5,887
Substandard | Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	6,889	5,826
Substandard | Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,009	1,045
Substandard | Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	493	719
Doubtful	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	1,242	892
Doubtful | Construction	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	53	66
Doubtful | 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	705	206
Doubtful | Other	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	10	17
Doubtful | Commercial Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	296	301
Doubtful | Municipal Loans	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	0	0
Doubtful | Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract]	'	'
Total ending loans balance	$178	$302

Loans_and_Allowance_for_Probab7

Loans and Allowance for Probable Loan Losses - Nonperforming Assets by Asset Class (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Nonperforming Assets by Asset Class [Abstract]	'	'
Nonaccrual loans	$9,620	$8,088
Accruing loans past due more than 90 days	4	3
Restructured loans	4,036	3,888
Other real estate owned	383	726
Repossessed assets	492	901
Total nonperforming assets	$14,535	$13,606

Loans_and_Allowance_for_Probab8

Loans and Allowance for Probable Loan Losses - Nonaccrual and Accruing Loans Past Due More Than 90 Days by Class (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	$9,620	$8,088
Accruing loans past due more than 90 days	4	3
Construction	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,067	1,472
Accruing loans past due more than 90 days	0	0
1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,566	1,435
Accruing loans past due more than 90 days	0	0
Other	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,431	599
Accruing loans past due more than 90 days	0	0
Commercial Loans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	513	1,062
Accruing loans past due more than 90 days	0	0
Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Nonaccrual loans	2,043	3,520
Accruing loans past due more than 90 days	$4	$3

Loans_and_Allowance_for_Probab9

Loans and Allowance for Probable Loan Losses - Aging of Past Due Loans by Class of Loan (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	$7,751	$14,955
60-89 Days Past Due	3,232	3,393
Greater than 90 Days Past Due	9,624	8,091
Total Past Due	20,607	26,439
Current	1,370,678	1,324,834
Total ending loans balance	1,391,285	1,351,273
Construction	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	0	311
60-89 Days Past Due	0	0
Greater than 90 Days Past Due	2,067	1,472
Total Past Due	2,067	1,783
Current	162,601	123,436
Total ending loans balance	164,668	125,219
1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	40	4,340
60-89 Days Past Due	559	781
Greater than 90 Days Past Due	2,566	1,435
Total Past Due	3,165	6,556
Current	388,510	383,943
Total ending loans balance	391,675	390,499
Other	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	990	2,652
60-89 Days Past Due	197	0
Greater than 90 Days Past Due	2,431	599
Total Past Due	3,618	3,251
Current	268,240	259,285
Total ending loans balance	271,858	262,536
Commercial Loans	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	16	411
60-89 Days Past Due	36	22
Greater than 90 Days Past Due	513	1,062
Total Past Due	565	1,495
Current	156,328	156,160
Total ending loans balance	156,893	157,655
Municipal Loans	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	239,883	245,550
Total ending loans balance	239,883	245,550
Loans to Individuals	'	'
Financing Receivable, Recorded Investment, Past Due [Abstract]	'	'
30-59 Days Past Due	6,705	7,241
60-89 Days Past Due	2,440	2,590
Greater than 90 Days Past Due	2,047	3,523
Total Past Due	11,192	13,354
Current	155,116	156,460
Total ending loans balance	$166,308	$169,814

Recovered_Sheet1

Loans and Allowance for Probable Loan Losses - Interest Income on Impaired Loans (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	$12,246	$11,292	$11,806	$12,208
Interest income recognized	108	72	294	207
Accruing interest at original contracted rate	315	312	553	599
Construction	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	1,643	1,551	1,578	1,919
Interest income recognized	9	2	11	3
Accruing interest at original contracted rate	35	41	69	82
1-4 Family Residential	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	3,418	3,238	2,982	3,121
Interest income recognized	21	5	65	20
Accruing interest at original contracted rate	55	42	110	82
Other	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	2,838	1,900	2,362	2,159
Interest income recognized	22	10	75	28
Accruing interest at original contracted rate	40	39	81	78
Commercial Loans	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	1,444	1,914	1,446	1,979
Interest income recognized	12	1	19	6
Accruing interest at original contracted rate	18	28	37	57
Municipal Loans	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	759	0	759	0
Interest income recognized	21	0	21	0
Accruing interest at original contracted rate	21	0	21	0
Loans to Individuals	'	'	'	'
Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract]	'	'	'	'
Average recorded investment	2,144	2,689	2,679	3,030
Interest income recognized	23	54	103	150
Accruing interest at original contracted rate	$146	$162	$235	$300

Recovered_Sheet2

Loans and Allowance for Probable Loan Losses - Impaired Loans by Class of Loan (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	$14,789	$13,822
Recorded investment with no allowance	0	0
Recorded investment with allowance	13,626	11,945
Total Recorded Investment	13,626	11,945
Related Allowance for Loan Losses	1,934	2,542
Construction	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	2,743	2,629
Recorded investment with no allowance	0	0
Recorded investment with allowance	2,067	1,472
Total Recorded Investment	2,067	1,472
Related Allowance for Loan Losses	113	103
1-4 Family Residential	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	4,106	2,748
Recorded investment with no allowance	0	0
Recorded investment with allowance	3,991	2,624
Total Recorded Investment	3,991	2,624
Related Allowance for Loan Losses	226	161
Other	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	3,577	1,800
Recorded investment with no allowance	0	0
Recorded investment with allowance	3,567	1,778
Total Recorded Investment	3,567	1,778
Related Allowance for Loan Losses	160	73
Commercial Loans	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	1,236	1,606
Recorded investment with no allowance	0	0
Recorded investment with allowance	1,087	1,369
Total Recorded Investment	1,087	1,369
Related Allowance for Loan Losses	372	240
Municipal Loans	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	759	759
Recorded investment with no allowance	0	0
Recorded investment with allowance	759	759
Total Recorded Investment	759	759
Related Allowance for Loan Losses	15	15
Loans to Individuals	'	'
Impaired Financing Receivable, Recorded Investment [Abstract]	'	'
Unpaid contractual principal balance	2,368	4,280
Recorded investment with no allowance	0	0
Recorded investment with allowance	2,155	3,943
Total Recorded Investment	2,155	3,943
Related Allowance for Loan Losses	$1,048	$1,950

Recovered_Sheet3

Loans and Allowance for Probable Loan Losses - Troubled Debt Restructurings (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
	contract		contract		contract		contract
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	$60		$36		$313		$646
Interest Rate Reductions	0		185		299		185
Combination (1)	388	[1]	435	[1]	514	[1]	538	[1]
Total Modifications	448		656		1,126		1,369
Number of Loans	3		34		12		45
Construction	'		'		'		'
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	'		'		'		40
Interest Rate Reductions	'		'		'		0
Combination (1)	'		'		'		0	[1]
Total Modifications	'		'		'		40
Number of Loans	'		'		'		1
1-4 Family Residential	'		'		'		'
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	0		0		0		285
Interest Rate Reductions	0		0		284		0
Combination (1)	0	[1]	391	[1]	0	[1]	468	[1]
Total Modifications	0		391		284		753
Number of Loans	0		2		1		6
Other	'		'		'		'
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	0		0		0		0
Interest Rate Reductions	0		0		0		0
Combination (1)	388	[1]	16	[1]	413	[1]	16	[1]
Total Modifications	388		16		413		16
Number of Loans	1		1		2		1
Commercial Loans	'		'		'		'
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	60		22		313		307
Interest Rate Reductions	0		0		0		0
Combination (1)	0	[1]	0	[1]	56	[1]	19	[1]
Total Modifications	60		22		369		326
Number of Loans	2		1		5		5
Loans to Individuals	'		'		'		'
Troubled Debt Restructuring [Abstract]	'		'		'		'
Extend Amortization Period	0		14		0		14
Interest Rate Reductions	0		185		15		185
Combination (1)	0	[1]	28	[1]	45	[1]	35	[1]
Total Modifications	$0		$227		$60		$234
Number of Loans	0		30		4		32
[1]	These modifications include an extension of the amortization period and interest rate reduction.

Recovered_Sheet4

Loans and Allowance for Probable Loan Losses - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Receivables [Abstract]	'	'	'	'	'
Financing Receivable, Significant Purchases	$9,600,000	$23,500,000	$30,400,000	$45,300,000	'
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]	'	'	'	'	'
Loan Review Larger Dollar Loan Relationship Scope, Aggregate Debt	500,000	'	500,000	'	'
Specifically reserved loans or loan relationships threshold	50,000	'	50,000	'	'
Loans and leases receivable, impaired, commitment to lend	$0	'	$0	'	$0

Longterm_Obligations_Longterm_

Long-term Obligations - Long-term Obligations (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
	Rate
Debt Instruments [Abstract]	'		'
FHLB advances	$505,710	[1]	$499,349	[1]
Long-term debt	60,311	[2]	60,311	[2]
Total long-term obligations	566,021		559,660
Federal Home Loan Bank Advances	'		'
Advances from Federal Home Loan Banks [Abstract]	'		'
Weighted average cost (in hundredths)	1.44%		'
Maturity date range, earliest	8-Jul-15		'
Maturity date range, latest	3-Jul-28		'
Southside Statutory Trust III	'		'
Debt Instrument [Line Items]	'		'
Maturity date	'2033		'
Debt Instruments [Abstract]	'		'
Long-term debt	20,619	[2],[3]	20,619	[2]
Long-term Debt, Other Disclosures [Abstract]	'		'
Adjusted rate of debt (in hundredths)	3.17%		'
Date of interest rate adjustment	'September 29, 2014		'
Debt Instrument, Description of Variable Rate Basis	' three-month LIBOR plus 294 basis points		'
Southside Statutory Trust V	'		'
Debt Instrument [Line Items]	'		'
Maturity date	'2037		'
Debt Instruments [Abstract]	'		'
Long-term debt	12,887	[2],[4]	12,887	[2]
Long-term Debt, Other Disclosures [Abstract]	'		'
Adjusted rate of debt (in hundredths)	2.48%		'
Date of interest rate adjustment	'September 14, 2014		'
Debt Instrument, Description of Variable Rate Basis	' three-month LIBOR plus 225 basis points		'
Southside Statutory Trust IV	'		'
Debt Instrument [Line Items]	'		'
Maturity date	'2037		'
Debt Instruments [Abstract]	'		'
Long-term debt	23,196	[2],[5]	23,196	[2]
Long-term Debt, Other Disclosures [Abstract]	'		'
Adjusted rate of debt (in hundredths)	1.52%		'
Date of interest rate adjustment	'July 29, 2014		'
Debt Instrument, Description of Variable Rate Basis	' three-month LIBOR plus 130 basis points		'
Magnolia Trust Company I	'		'
Debt Instrument [Line Items]	'		'
Maturity date	'2035		'
Debt Instruments [Abstract]	'		'
Long-term debt	$3,609	[2],[6]	$3,609	[2]
Long-term Debt, Other Disclosures [Abstract]	'		'
Adjusted rate of debt (in hundredths)	2.03%		'
Date of interest rate adjustment	'August 22, 2014		'
Debt Instrument, Description of Variable Rate Basis	' three-month LIBOR plus 180 basis points		'
LIBOR [Member] | Southside Statutory Trust III	'		'
Long-term Debt, Other Disclosures [Abstract]	'		'
Debt Instrument, Basis Spread on Variable Rate	2.94%		'
LIBOR [Member] | Southside Statutory Trust V	'		'
Long-term Debt, Other Disclosures [Abstract]	'		'
Debt Instrument, Basis Spread on Variable Rate	2.25%		'
LIBOR [Member] | Southside Statutory Trust IV	'		'
Long-term Debt, Other Disclosures [Abstract]	'		'
Debt Instrument, Basis Spread on Variable Rate	1.30%		'
LIBOR [Member] | Magnolia Trust Company I	'		'
Long-term Debt, Other Disclosures [Abstract]	'		'
Debt Instrument, Basis Spread on Variable Rate	1.80%		'
[1]	At June 30, 2014, the weighted average cost of these advances was 1.44%. Long-term FHLB Advances have maturities ranging from July 2015 through July 2028.
[2]	This long-term debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.
[3]	This debt carries an adjustable rate of 3.1741% through September 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 294 basis points.
[4]	This debt carries an adjustable rate of 2.4806% through September 14, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 225 basis points.
[5]	This debt carries an adjustable rate of 1.52485% through July 29, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 130 basis points.
[6]	This debt carries an adjustable rate of 2.02735% through August 22, 2014 and adjusts quarterly at a rate equal to three-month LIBOR plus 180 basis points.

Employee_Benefit_Plans_Employe

Employee Benefit Plans - Employee Benefit Plans (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Pension Plan	'	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'	'
Service cost	$401	$503	$849	$1,059
Interest cost	876	792	1,748	1,577
Expected return on assets	-1,412	-1,199	-2,824	-2,397
Net actuarial loss recognition	141	554	272	1,099
Prior service (credit) cost amortization	-6	-10	-10	-21
Net periodic benefit cost	0	640	35	1,317
Restoration Plan	'	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'	'
Service cost	68	98	137	149
Interest cost	145	135	281	234
Expected return on assets	0	0	0	0
Net actuarial loss recognition	148	197	249	295
Prior service (credit) cost amortization	2	-1	3	-1
Net periodic benefit cost	363	429	670	677
Pension and Other Postretirement Benefit Contributions [Abstract]	'	'	'	'
Pension and other postretirement benefit contributions	'	'	$120	'

Sharebased_Incentive_Plans_Sha

Share-based Incentive Plans - Share-based Incentive Plans (Details) (2009 Incentive Plan, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Common stocks reserved and available for issuance (in shares)	1,340,098	'	1,340,098	'
Number of nonvested awards outstanding (in shares)	356,407	305,403	356,407	305,403
Share-based compensation expense	$291,000	$166,000	$577,000	$373,000
Income tax benefit related to stock compensation expense	102,000	58,000	202,000	131,000
Unrecognized compensation expense	$2,500,000	$1,700,000	$2,500,000	$1,700,000
Compensation cost not yet recognized, period for recognition (in years)	'	'	'2 years 8 months 25 days	'
Nonqualified Stock Options | Three Year Vesting Schedule	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Contractual term	'	'	'10 years	'
Nonqualified Stock Options | Four Year Vesting Schedule	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Contractual term	'	'	'10 years	'
Maximum | Restricted Stock	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Award vesting period	'	'	'4 years	'
Maximum | Nonqualified Stock Options	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Award vesting period	'	'	'4 years	'
Minimum | Restricted Stock	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Award vesting period	'	'	'3 years	'
Minimum | Nonqualified Stock Options	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Award vesting period	'	'	'3 years	'

Sharebased_Incentive_Plans_Sha1

Share-based Incentive Plans - Share-based Incentive Plans, Part II (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Shares Available for Grant for All Share-based Plans [Roll Forward]	'
Balance, January 1, 2014 (shares)	738,764
Granted (shares)	0
Stock awards vested (shares)	0
Forfeited (shares)	16,988
Canceled/expired (shares)	1,898
Balance, June 30, 2014 (shares)	757,650
Restricted Stock	'
Number of shares	'
Balance, January 1, 2014 (shares)	56,823
Granted (shares)	0
Stock awards vested (shares)	-6,525
Forfeited (shares)	-2,901
Canceled/expired (shares)	0
Balance, June 30, 2014 (shares)	47,397
Weighted- Average Grant-Date Fair Value	'
Balance, January 1, 2014 (in dollars per share)	22
Granted (in dollars per share)	0
Stock awards vested (in dollars per share)	16.58
Forfeited (in dollars per share)	22.11
Canceled/expired (in dollars per share)	0
Balance, June 30, 2014 (in dollars per share)	22.73
Stock Options	'
Number of shares	'
Balance, January 1, 2014 (shares)	501,846
Granted (shares)	0
Stock options exercised (shares)	-4,949
Stock awards vested (shares)	0
Forfeited (shares)	-14,087
Canceled/expired (shares)	-1,898
Balance, June 30, 2014 (shares)	480,912
Weighted- Average Exercise Price	'
Balance, January 1, 2014 (in dollars per share)	20.56
Granted (in dollars per share)	0
Stock options exercised (in dollars per share)	17.29
Forfeited (in dollars per share)	22.3
Canceled/expired (in dollars per share)	18.99
Balance, June 30, 2014 (in dollars per share)	20.55
Weighted- Average Grant-Date Fair Value	'
Balance, January 1, 2014 (in dollars per share)	6.18
Granted (in dollars per share)	0
Stock options exercised (in dollars per share)	5.13
Stock awards vested (in dollars per share)	0
Forfeited (in dollars per share)	6.69
Canceled/expired (in dollars per share)	5.27
Balance, June 30, 2014 (in dollars per share)	6.18

Sharebased_Incentive_Plans_Sha2

Share-based Incentive Plans - Share-based Incentive Plans, Stock Options Exercise Price Range (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Shares Outstanding	'
Number of shares	480,912
Weighted- average exercise price (in dollars per share)	$20.55
Weighted- average remaining contractual term (in years)	'8 years 2 months 13 days
Options Exercisable	'
Number of shares	171,902
Weighted- average exercise price (in dollars per share)	$17.37
$16.58 - $25.85	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of exercise prices, lower range limit (in dollars per share)	$16.58
Range of exercise prices, upper range limit (in dollars per share)	$25.85
Shares Outstanding	'
Number of shares	480,912
Weighted- average exercise price (in dollars per share)	$20.55
Weighted- average remaining contractual term (in years)	'8 years 2 months 13 days
Options Exercisable	'
Number of shares	171,902
Weighted- average exercise price (in dollars per share)	$17.37

Sharebased_Incentive_Plans_Sha3

Share-based Incentive Plans - Share-based Incentive Plans, Issued, Exercised, and Related Intrinsic Value and Tax Benefit (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Share-based Incentive Plans [Abstract]	'	'
Stock compensation issued from available authorized shares (in shares)	11,812	9,994
Total intrinsic value of stock options outstanding	$4,000,000	'
Total intrinsic value of exercisable stock options	2,000,000	'
Total intrinsic value of stock options exercised	50,000	14,000
Cash received from exercise of stock options	$86,000	$38,000

Fair_Value_Measurement_Fair_Va

Fair Value Measurement - Fair Value Measurements, Recurring and Nonrecurring Basis (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Carrying Amount	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	$1,103,648		$1,177,687
Total nonrecurring fair value measurements	12,567		11,030
Carrying Amount | US Treasury	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	29,406		0
Carrying Amount | US Government Agency Debentures	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		10,129
Carrying Amount | State and Political Subdivisions	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	309,231		314,074
Carrying Amount | Other Stocks and Bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	13,271		13,226
Carrying Amount | Residential MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	652,061	[1]	772,085	[1]
Carrying Amount | Commercial MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	99,679	[1]	68,173	[1]
Carrying Amount | Foreclosed assets	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	875	[2]	1,627	[2]
Carrying Amount | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	11,692	[3]	9,403	[3]
Level 1	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	29,406		0
Total nonrecurring fair value measurements	0		0
Level 1 | US Treasury	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	29,406		0
Level 1 | US Government Agency Debentures	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 1 | State and Political Subdivisions	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 1 | Other Stocks and Bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 1 | Residential MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Level 1 | Commercial MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Level 1 | Foreclosed assets	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	0	[2]	0	[2]
Level 1 | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	0	[3]	0	[3]
Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	1,074,242		1,177,687
Total nonrecurring fair value measurements	0		0
Level 2 | US Treasury	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 2 | US Government Agency Debentures	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		10,129
Level 2 | State and Political Subdivisions	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	309,231		314,074
Level 2 | Other Stocks and Bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	13,271		13,226
Level 2 | Residential MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	652,061	[1]	772,085	[1]
Level 2 | Commercial MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	99,679	[1]	68,173	[1]
Level 2 | Foreclosed assets	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	0	[2]	0	[2]
Level 2 | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	0	[3]	0	[3]
Level 3	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total nonrecurring fair value measurements	12,567		11,030
Level 3 | US Treasury	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 3 | US Government Agency Debentures	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 3 | State and Political Subdivisions	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 3 | Other Stocks and Bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Level 3 | Residential MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Level 3 | Commercial MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Level 3 | Foreclosed assets	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	875	[2]	1,627	[2]
Level 3 | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	11,692	[3]	9,403	[3]
Total Gains (Losses)	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total nonrecurring fair value measurements	-22		-549
Total Gains (Losses) | US Treasury	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total Gains (Losses) | US Government Agency Debentures	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total Gains (Losses) | State and Political Subdivisions	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total Gains (Losses) | Other Stocks and Bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0		0
Total Gains (Losses) | Residential MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Total Gains (Losses) | Commercial MBS	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total recurring fair value measurements	0	[1]	0	[1]
Total Gains (Losses) | Foreclosed assets	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	0	[2]	-485	[2]
Total Gains (Losses) | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total nonrecurring fair value measurements	($22)	[3]	($64)	[3]
[1]	All mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
[2]	Losses represent related losses on foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.
[3]	Loans represent collateral dependent impaired loans with a specific valuation allowance. Losses on these loans represent charge-offs which are netted against the allowance for loan losses.

Fair_Value_Measurement_Fair_Va1

Fair Value Measurement - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2013
Total gains or losses realized and unrealized [Abstract]	'	'
Fair value, assets measured on recurring basis, change in unrealized gain (loss)	$0	($42)
Securities	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Balance at Beginning of Period	592	990
Total gains or losses realized and unrealized [Abstract]	'	'
Included in earnings	0	-42
Included in other comprehensive income (loss)	552	196
Purchases	0	0
Issuances	0	0
Settlements	0	0
Transfers in and/or out of Level 3	0	0
Balance at End of Period	$1,144	$1,144

Fair_Value_Measurement_Fair_Va2

Fair Value Measurement - Fair Value, Balance Sheet Grouping (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investment securities:	'	'
Held to maturity, at carrying value	$394,638	$377,383
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	266,185	271,836
Carrying Amount	'	'
Financial Assets:	'	'
Cash and cash equivalents	154,423	54,431
Investment securities:	'	'
Held to maturity, at carrying value	390,221	391,552
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	260,659	275,569
FHLB stock and other investments, at cost	27,576	36,130
Loans, net of allowance for loan losses	1,372,877	1,332,396
Loans held for sale	755	151
Financial Liabilities:	'	'
Retail deposits	2,601,478	2,527,808
Federal funds purchased and repurchase agreements	2,057	859
FHLB advances	514,123	572,794
Long-term debt	60,311	60,311
Estimated Fair Value	'	'
Financial Assets:	'	'
Cash and cash equivalents	154,423	54,431
Investment securities:	'	'
Held to maturity, at carrying value	394,638	377,383
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	266,185	271,836
FHLB stock and other investments, at cost	27,576	36,130
Loans, net of allowance for loan losses	1,349,385	1,306,524
Loans held for sale	755	151
Financial Liabilities:	'	'
Retail deposits	2,600,319	2,526,143
Federal funds purchased and repurchase agreements	2,057	859
FHLB advances	503,535	559,648
Long-term debt	43,742	43,476
Level 1	'	'
Financial Assets:	'	'
Cash and cash equivalents	154,423	54,431
Investment securities:	'	'
Held to maturity, at carrying value	0	0
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	0	0
FHLB stock and other investments, at cost	0	0
Loans, net of allowance for loan losses	0	0
Loans held for sale	0	0
Financial Liabilities:	'	'
Retail deposits	0	0
Federal funds purchased and repurchase agreements	0	0
FHLB advances	0	0
Long-term debt	0	0
Level 2	'	'
Financial Assets:	'	'
Cash and cash equivalents	0	0
Investment securities:	'	'
Held to maturity, at carrying value	394,638	377,383
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	266,185	271,836
FHLB stock and other investments, at cost	27,576	36,130
Loans, net of allowance for loan losses	0	0
Loans held for sale	755	151
Financial Liabilities:	'	'
Retail deposits	2,600,319	2,526,143
Federal funds purchased and repurchase agreements	2,057	859
FHLB advances	503,535	559,648
Long-term debt	43,742	43,476
Level 3	'	'
Financial Assets:	'	'
Cash and cash equivalents	0	0
Investment securities:	'	'
Held to maturity, at carrying value	0	0
Mortgage-backed securities:	'	'
Held to maturity, at carrying value	0	0
FHLB stock and other investments, at cost	0	0
Loans, net of allowance for loan losses	1,349,385	1,306,524
Loans held for sale	0	0
Financial Liabilities:	'	'
Retail deposits	0	0
Federal funds purchased and repurchase agreements	0	0
FHLB advances	0	0
Long-term debt	$0	$0

Income_Taxes_Provision_for_Inc

Income Taxes - Provision for Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Current tax provision	$1,342	$1,895	$3,358	$2,711
Deferred tax (benefit) provision	-504	-183	-1,361	848
Provision for tax expense charged to operations	$838	$1,712	$1,997	$3,559

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'	'	'
Net deferred tax assets	$12,700,000	'	$12,700,000	'	$18,400,000
Deferred tax assets, valuation allowance	0	'	0	'	0
Unrecognized tax benefits	50,000	'	50,000	'	'
Income tax expense	$838,000	$1,712,000	$1,997,000	$3,559,000	'
Effective income tax rate, percent	7.40%	13.40%	9.70%	15.00%	'
Effective income tax rate, at federal statutory income tax rate, percent	'	'	35.00%	'	'

OffBalanceSheet_Arrangements_C2

Off-Balance-Sheet Arrangements, Commitments and Contingencies - Off-Balance-Sheet Arrangements, Commitments and Contingencies (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Commitments and Guarantee Obligations [Line Items]	'	'	'
Maturity of credit card and ready reserves	'Due after one	'Due after one	'
Unused Commitments:	'	'	'
Due in one year or less	$133,385,000	$110,210,000	'
Due after one year	59,031,000	46,032,000	'
Total outstanding unused commitments	192,416,000	156,242,000	'
Securities:	'	'	'
Unsettled trades to purchase securities	10,269,000	973,000	27,814,000
Unsettled trades to sell securities	19,183,000	3,933,000	0
Deposits:	'	'	'
Unsettled issuances of brokered CDs	0	0	11,069,000
Standby letters of credit	'	'	'
Unused Commitments:	'	'	'
Letters of Credit Outstanding, Amount	6,100,000	5,900,000	'
Credit card and ready reserve	'	'	'
Unused Commitments:	'	'	'
Total outstanding unused commitments	$14,000,000	$13,800,000	'