PARENT ONLY CONDENSED FINANCIAL STATEMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Expenses
Interest expense									$ 8,607	$ 9,979	$ 14,686
Salaries and benefits									54,132	52,165	48,990
Income before income tax									36,775	31,664	33,285
Income tax (benefit)									7,779	5,319	6,027
Net income	6,560	8,457	7,754	6,225	7,398	7,632	7,324	3,991	28,996	26,345	27,258
Parent Company
Income
Dividends from subsidiaries									24,275	34,200	47,800
Fees from subsidiaries									13,518	14,160	19,024
Other income									526	9	(845)
Total income									38,319	48,369	65,979
Expenses
Interest expense									1,286	1,675	1,825
Salaries and benefits									11,038	9,790	11,238
Professional fees									1,372	951	1,465
Other expenses									9,381	10,059	13,655
Total expenses									23,077	22,475	28,183
Income before income tax									15,242	25,894	37,796
Income tax (benefit)									(3,118)	(2,849)	(3,377)
Income before equity in undistributed income of subsidiaries									18,360	28,743	41,173
Equity in undistributed income (loss) of subsidiaries									10,636	(2,398)	(13,915)
Net income									$ 28,996	$ 26,345	$ 27,258