Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 25,010	$ 21,057
Adjustments to reconcile net income to cash provided by operating activities
Depreciation and amortization	4,141	5,346
Provision for loan losses	4,400	10,100
Deferred income tax expense (benefit)	5	(19)
Net loss on sale of investments	4
Loss on write-down of investments in securities available for sale		76
Loss (gain) on sale of fixed assets	28	(16)
Loss on sale of other real estate owned and foreclosed assets	127	290
Gain realized from early termination of hedging relationship		(22)
Realized gain on sale leaseback transaction	(517)	(517)
Stock based compensation	1,389	1,551
Excess tax benefit related to equity award activity	(312)	(59)
Increase in cash surrender value of life insurance policies	(1,531)	(1,451)
Change in fair value on loans held for sale	1,335	(112)
Net change in:
Trading assets		(265)
Loans held for sale	14,355	(1,698)
Other assets	37,689	(4,975)
Other liabilities	(14,885)	831
Total adjustments	46,228	9,060
Net cash provided by operating activities	71,238	30,117
Cash flows used in investing activities
Proceeds from sales of securities available for sale	169
Proceeds from maturities and principal repayments of securities available for sale	50,709	46,434
Purchase of securities available for sale	(34,878)	(71,699)
Proceeds from maturities and principal repayments of securities held to maturity	27,535	25,944
Purchase of securities held to maturity	(74,834)	(9,975)
Redemption of Federal Home Loan Bank stock	3,093	2,290
Proceeds from (purchase of) life insurance policies	(101)	63
Net increase in loans	(15,713)	(202,505)
Purchase of bank premises and equipment	(4,221)	(3,889)
Proceeds from the sale of bank premises and equipment		30
Proceeds resulting from early termination of hedging relationship		22
Proceeds from the sale of other real estate owned and foreclosed assets	5,237	1,801
Net cash used in investing activities	(43,004)	(211,484)
Cash flows provided by financing activities
Net increase (decrease) in time deposits	(43,154)	9,373
Net increase in other deposits	172,940	191,931
Net decrease in wholesale and customer repurchase agreements	(11,533)	(21,290)
Net advance of short term Federal Home Loan Bank advances	(11,695)	(40,000)
Net repayment of long term Federal Home Loan Bank advances	(9,123)	0
Proceeds from exercise of stock options	744	459
Tax benefit related to equity award activity	312	59
Restricted stock awards issued, net of awards surrendered	(668)	(344)
Tax benefit from deferred compensation distribution	100	86
Shares issued under direct stock purchase plan	339	591
Common dividends paid	(5,032)	(8,623)
Net cash provided by financing activities	93,230	132,242
Net increase (decrease) in cash and cash equivalents	121,464	(49,125)
Cash and cash equivalents at beginning of year	215,474	237,504
Cash and cash equivalents at end of period	336,938	188,379
Supplemental schedule of noncash investing and financing activities
Transfer of loans to foreclosed assets	1,138	5,136
Transfer of securities from trading to available for sale		$ 8,505