PARENT ONLY CONDENSED FINANCIAL STATEMENTS (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income	$ 7,398	$ 7,632	$ 7,324	$ 3,991	$ 7,279	$ 6,986	$ 6,982	$ 6,011	$ 26,345	$ 27,258	$ 23,813
Change in other assets and liabilities									5,091	1,916	3,734
Net cash provided by operating activities									60,083	54,179	36,060
Investing Activities
Purchases of equipment									(7,631)	(7,387)	(6,865)
Net cash provided/(used) by investing activities									(141,392)	(39,297)	76,316
Financing Activities
Repurchase of preferred shares									(15,100)	(40,255)
Purchase of treasury shares									(204)
Repayment of subordinated debentures, net									(4,000)
Cash dividends on preferred stock									(470)	(1,967)	(2,850)
Cash dividends on common stock									(5,709)	(1,623)	(807)
Net cash provided/(used) by financing activities									76,979	(58,380)	(63,351)
Net change in cash and cash equivalents									(4,330)	(43,498)	49,025
Cash and cash equivalents, beginning of year				65,650				109,148	65,650	109,148	60,123
Cash and cash equivalents, end of year	61,320				65,650				61,320	65,650	109,148
Parent Company
Operating Activities
Net income									26,345	27,258	23,813
Undistributed (income)/loss of subsidiaries									2,398	13,915	(26,951)
Change in other assets and liabilities									1,833	2,862	2,699
Net cash provided by operating activities									30,576	44,035	(439)
Investing Activities
Capital contributed to subsidiary, net									(250)
Purchases of equipment									(667)	(1,230)	(2,166)
Net cash provided/(used) by investing activities									(917)	(1,230)	(2,166)
Financing Activities
Proceeds from exercise of stock options									389	120
Repurchase of preferred shares									(15,100)	(40,255)
Purchase of treasury shares									(204)
Repayment of subordinated debentures, net									(4,000)
Cash dividends on preferred stock									(470)	(1,967)	(2,850)
Cash dividends on common stock									(5,709)	(1,623)	(807)
Net cash provided/(used) by financing activities									(25,094)	(43,725)	(3,657)
Net change in cash and cash equivalents									4,565	(920)	(6,262)
Cash and cash equivalents, beginning of year				7,102				8,022	7,102	8,022	14,284
Cash and cash equivalents, end of year	$ 11,667				$ 7,102				$ 11,667	$ 7,102	$ 8,022