Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 8,477	$ 3,931
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	982	1,018
Amortization of intangible assets	52	53
(Benefit from) provision for loan losses	(1,108)	3,996
Amortization of investment securities premium, net	214	329
Originations of loans for resale	(53,415)	(58,041)
Proceeds from sale of loans originated for resale	59,338	63,491
Gain on sale of loans	(2,294)	(1,650)
Change in market value of mortgage servicing rights	61	369
Provision for losses on foreclosed assets	27	83
(Gain) loss on sale of foreclosed assets	(551)	358
Loss on disposal of fixed assets	16	235
Increase in cash value of life insurance	(426)	(450)
Life insurance proceeds	706	2,811
Stock option vesting expense	236	257
Stock option tax benefits	(20)
Change in:
Reserve for unfunded commitments	(440)	(190)
Interest receivable	(565)	217
Interest payable	(61)	(87)
Other assets and liabilities, net	2,056	1,223
Net cash from operating activities	13,285	17,953
Investing activities:
Proceeds from maturities of securities available-for-sale	17,286	20,060
Purchases of securities available-for-sale		(3,588)
Net redemption of restricted equity securities		102
Loan principal decreases, net	25,051	33,795
Proceeds from sale of foreclosed assets	7,635	3,021
Improvement of foreclosed assets		(225)
Proceeds from sale of premises and equipment	1
Purchases of premises and equipment	(3,241)	(938)
Net cash from investing activities	46,732	52,227
Financing activities:
Net decrease in deposits	(4,152)	(20,790)
Net change in short-term other borrowings	(1,072)	(3,467)
Stock option excess tax benefits	20
Dividends paid	(1,441)	(1,438)
Net cash used for financing activities	(6,645)	(25,695)
Net change in cash and cash equivalents	53,372	44,485
Cash and cash equivalents at beginning of period	748,899	637,275
Cash and cash equivalents at end of period	802,271	681,760
Supplemental disclosure of noncash activities:
Loans transferred to other real estate owned	5,737	1,694
Unrealized net loss on securities available for sale	(1,073)	(265)
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	1,298	2,215
Cash paid for income taxes	$ 2,600