Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total		Common Stock [Member]	Additional Paid-In Capital	Retained Earnings	Unallocated ESOP Shares	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Stockholders' Equity, Beginning Balance at Dec. 31, 2013		$ 192,154		$ 16,744	$ 229,290	$ 27,457	$ (1,800)	$ (4,373)	$ (75,164)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		16,991		0	0	16,991	0	0	0
Other Comprehensive Income		89	[1]	0	0	0	0	89	0
2% Stock Dividend		0		335	8,617	(8,952)	0	0	0
Cash Dividends Paid	[2]	(9,256)		0	0	(9,256)	0	0	0
Stock Options Exercised, Net		1,063		0	619	0	0	0	444
Shares Issued Under the Directors' Stock Plan		101		0	63	0	0	0	38
Shares Issued Under the Employee Stock Purchase Plan		351		0	212	0	0	0	139
Stock-Based Compensation Expense		270		0	270	0	0	0	0
Tax Benefit for Disposition of Stock Options		22		0	22	0	0	0	0
Purchases of Treasury Stock		(2,235)		0	0	0	0	0	(2,235)
Acquisition of Subsidiaries		91		0	56	0	0	0	35
Allocation of ESOP Stock		448		0	(98)	0	(350)	0	0
Stockholders' Equity, Ending Balance at Sep. 30, 2014		200,089		17,079	239,247	26,240	(1,450)	(4,284)	(76,743)
Stockholders' Equity, Beginning Balance at Dec. 31, 2014		200,926		17,079	239,721	29,458	(1,450)	(7,166)	(76,716)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		18,093		0	0	18,093	0	0	0
Other Comprehensive Income		646	[1]	0	0	0	0	646	0
2% Stock Dividend		0		342	8,939	(9,281)	0	0	0
Cash Dividends Paid	[3]	(9,479)		0	0	(9,479)	0	0	0
Stock Options Exercised, Net		531		0	289	0	0	0	242
Shares Issued Under the Directors' Stock Plan		118		0	73	0	0	0	45
Shares Issued Under the Employee Stock Purchase Plan		359		0	222	0	0	0	137
Shares Issued for Dividend Reinvestment Plans		439		0	281	0	0	0	158
Stock-Based Compensation Expense		233		0	233	0	0	0	0
Tax Benefit for Disposition of Stock Options		31		0	31	0	0	0	0
Purchases of Treasury Stock		(1,247)		0	0	0	0	0	(1,247)
Acquisition of Subsidiaries		0
Allocation of ESOP Stock		492		0	(142)	0	(350)	0	0
Stockholders' Equity, Ending Balance at Sep. 30, 2015		$ 211,142		$ 17,421	$ 249,931	$ 28,791	$ (1,100)	$ (6,520)	$ (77,381)

[1] All amounts are net of tax. Amounts in parentheses indicate debits.

[2] Share and Per Share Amounts have been restated for the September 2015 2% stock dividend.

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