CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net Income	$ 41,482	$ 41,954	$ 15,274
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	19,227	20,544	55,816
Deferred tax expense (benefit)	12,704	2,551	(1,192)
Depreciation and amortization	11,090	7,912	9,026
Net losses on securities and other assets	431	1,838	9,776
Net amortization of premiums and discounts on securities	543	1,381	721
Net amortization of premiums and discounts on long-term debt	(117)	(113)	(124)
Income from increase in cash surrender value of bank owned life insurance	(5,539)	(5,850)	(5,596)
Decrease in interest receivable	921	2,689	1,276
Decrease in interest payable	(1,172)	(1,280)	(1,423)
Decrease in prepaid FDIC insurance	9,205	4,693	5,124
(Decrease) increase in income taxes payable	(615)	6,484	(5,362)
Other—net	(2,426)	(4,079)	803
Net cash provided by operating activities	85,734	78,724	84,119
Transactions with securities available for sale:
Proceeds from sales	671	0	76,914
Proceeds from maturities and redemptions	356,667	574,846	480,250
Purchases	(539,894)	(605,435)	(723,805)
Purchases of FHLB stock	(18,120)	0	0
Proceeds from the redemption of FHLB stock	10,904	11,568	9,063
Proceeds from bank owned life insurance	2,092	2,501	238
Proceeds from the sale of loans	20,760	15,981	5,766
Proceeds from sales of other assets	12,713	17,660	23,756
Net (increase) decrease in loans	(143,438)	(178,321)	56,181
Purchases of premises and equipment	(9,635)	(10,182)	(8,320)
Net cash used in investing activities	(307,280)	(171,382)	(79,957)
Financing Activities
Net (decrease) increase in federal funds purchased	(18,000)	(41,300)	62,500
Net increase in other short-term borrowings	288,387	84,750	62,417
Net increase (decrease) in deposits	46,006	53,256	(113,090)
Repayments of other long-term debt	(29,969)	(25,480)	(24,561)
Proceeds from issuance of long-term debt	0	100,000	29,600
Repayments of subordinated debentures	(34,702)	0	0
Proceeds from issuance of common stock	0	0	144
Discount on dividend reinvestment plan purchases	(112)	(92)	(63)
Dividends paid	(22,344)	(18,759)	(12,558)
Proceeds from reissuance of treasury stock	176	1,028	72
Purchase of treasury stock	(33,439)	(36,242)	(9)
Stock option tax benefit	0	1	6
Net cash provided by financing activities	196,003	117,162	4,458
Net (decrease) increase in cash and cash equivalents	(25,543)	24,504	8,620
Cash and cash equivalents at January 1	102,982	78,478	69,858
Cash and cash equivalents at December 31	$ 77,439	$ 102,982	$ 78,478