CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income/ (loss)	Unallocated Common Stock of ESOP	Total
Balance at Dec. 31, 2013	$ 943	$ 619,678	$ 569,547	$ (11,900)	$ (23,083)	$ 1,155,185
Balance (in shares) at Dec. 31, 2013	94,243,713
Comprehensive income:
Net Income			14,611			14,611
Other comprehensive income, net of tax of $(2,006) and $(2,421) for the quarter ended March 31, 2015 and 2014, respectively				3,805		3,805
Total comprehensive income			14,611	3,805		18,416
Exercise of stock options	2	2,292				2,294
Exercise of stock options (in shares)	220,717
Stock compensation expense		788			451	1,239
Dividends paid ($0.14 and $0.23 per share for the quarter ended March 31, 2015 and 2014, respectively)			(21,225)			(21,225)
Balance at Mar. 31, 2014	945	622,758	562,933	(8,095)	(22,632)	1,155,909
Balance (in shares) at Mar. 31, 2014	94,464,430
Balance at Dec. 31, 2014	947	626,134	481,577	(24,370)	(21,641)	1,062,647
Balance (in shares) at Dec. 31, 2014	94,721,453
Comprehensive income:
Net Income			16,170			16,170
Other comprehensive income, net of tax of $(2,006) and $(2,421) for the quarter ended March 31, 2015 and 2014, respectively				3,147		3,147
Total comprehensive income			16,170	3,147		19,317
Exercise of stock options	2	1,433				1,435
Exercise of stock options (in shares)	149,897
Stock compensation expense		804			76	880
Stock repurchases	(3)	(3,787)				(3,790)
Share repurchases (in shares)	(318,000)
Dividends paid ($0.14 and $0.23 per share for the quarter ended March 31, 2015 and 2014, respectively)			(12,973)			(12,973)
Balance at Mar. 31, 2015	$ 946	$ 624,584	$ 484,774	$ (21,223)	$ (21,565)	$ 1,067,516
Balance (in shares) at Mar. 31, 2015	94,553,350