Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
OPERATING ACTIVITIES
Net income	$ 14,261,000	$ 10,718,000	$ 12,513,000
Items not requiring (providing) cash:
Depreciation and amortization	3,808,000		2,940,000
Provision for loan losses	2,510,000		1,953,000
Net (accretion) amortization of investment securities and assets not covered by FDIC loss share	(1,994,000)		873,000
Stock-based compensation expense	655,000		714,000
Net accretion on assets covered by FDIC loss share	(350,000)		(3,170,000)
Deferred income taxes	(3,143,000)		(1,756,000)
(Gain) loss on sale of investments	(38,000)		193,000
Gain on sale of premises and equipment	(2,296,000)
Bank owned life insurance income	(705,000)		(644,000)
Changes in:
Interest receivable	1,400,000		1,893,000
Mortgage loans held for sale	(10,915,000)		10,913,000
Assets held in trading accounts	2,097,000		(2,515,000)
Other assets	(5,982,000)		4,997,000
Accrued expenses and other liabilities	4,113,000		(2,788,000)
Income taxes payable	(2,892,000)		158,000
Net cash provided by operating activities	529,000		26,274,000
INVESTING ACTIVITIES
Net originations of loans	(34,126,000)		(14,323,000)
Net collections of loans covered by FDIC loss share	34,830,000		53,044,000
Proceeds from sale of student loans	22,136,000
Proceeds from sale of premises and equipment, net of purchases	10,760,000		(3,274,000)
Proceeds from sale of foreclosed assets held for sale	13,575,000		12,669,000
Proceeds from sale of foreclosed assets held for sale, covered by FDIC loss share	7,677,000		7,897,000
Proceeds from sale of short-term investment securities	1,504,000
Proceeds from sale of available-for-sale securities	1,048,000		617,000
Proceeds from maturities of available-for-sale securities	59,920,000		69,930,000
Purchases of available-for-sale securities	(118,954,000)		(60,817,000)
Proceeds from maturities of held-to-maturity securities	130,682,000		105,426,000
Purchases of held-to-maturity securities	(184,965,000)		(164,840,000)
Purchase of bank owned life insurance	(25,000)		(7,000,000)
Cash received on FDIC loss share	11,886,000		8,447,000
Net cash (used in) provided by investing activities	(44,052,000)		7,776,000
FINANCING ACTIVITIES
Net change in deposits	(55,842,000)		(61,044,000)
Dividends paid	(7,467,000)		(6,903,000)
Net change in other borrowed funds	(1,488,000)		(11,782,000)
Net change in federal funds purchased and securities sold under agreements to repurchase	(9,661,000)		(25,015,000)
Net shares issued under stock compensation plans	1,261,000		450,000
Repurchase of common stock			(8,319,000)
Net cash used in financing activities	(73,197,000)		(112,613,000)
DECREASE IN CASH AND CASH EQUIVALENTS	(116,720,000)		(78,563,000)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	539,380,000	459,234,000	537,797,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 422,660,000	$ 539,380,000	$ 459,234,000