CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 35,394	$ 30,662	$ 24,543
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	2,790	2,279	2,194
Provision for loan losses	2,549	13,800	23,947
(Gain) Loss on sale and write down of other real estate owned	(99)	387	129
Amortization of intangible assets	52	54	54
Amortization of loan servicing rights	728	594	620
Net change in loan servicing rights valuation allowance	(66)	86	(24)
Loans originated for sale	(119,647)	(78,425)	(91,638)
Net gain on sales of loans	(2,805)	(1,712)	(2,023)
Proceeds from sale of loans	115,163	82,161	88,818
Net loss on sale of premises and equipment	3	17	4
Net (gain) loss on securities available for sale	376	167	(4)
Impairment on available for sale securities	1,026	286	1,587
Net securities amortization	8,209	3,601	1,741
Stock compensation expense	1,344	1,342	739
Earnings on life insurance	(955)	(970)	(1,085)
Tax benefit of stock option exercises	(112)	(138)	(371)
Net change:
Accrued income receivable	1,121	(538)	(474)
Accrued expenses payable	1,969	1,558	(1,891)
Other assets	3,936	(3,930)	(2,811)
Other liabilities	(384)	121	1,644
Total adjustments	15,198	20,740	21,156
Net cash from operating activities	50,592	51,402	45,699
Cash flows from investing activities:
Proceeds from sale of securities available for sale	27,855	73,318	0
Proceeds from maturities, calls and principal paydowns of securities available for sale	125,107	84,051	90,458
Purchases of securities available for sale	(161,621)	(179,296)	(114,063)
Purchase of life insurance	(20,227)	(134)	(1,102)
Net increase in total loans	(28,728)	(150,115)	(94,702)
Proceeds from sales of land, premises and equipment	2	33	0
Purchases of land, premises and equipment	(2,899)	(6,660)	(3,027)
Proceeds from sales of other real estate owned	1,791	2,070	2,789
Net cash from investing activities	(58,720)	(176,733)	(119,647)
Cash flows from financing activities:
Net increase in total deposits	169,060	211,671	349,900
Net decrease in short-term borrowings	(20,107)	(32,062)	(179,999)
Payments on long-term borrowings	(2)	(1)	(25,001)
Common dividends paid	(13,630)	(10,045)	(9,989)
Preferred dividends paid	(13)	(13)	(1,601)
Redemption of preferred stock	0	0	(56,044)
Proceeds from stock option exercise	894	468	1,052
Purchase of treasury stock	(421)	(244)	(212)
Net cash from financing activities	135,781	169,774	78,106
Net change in cash and cash equivalents	127,653	44,443	4,158
Cash and cash equivalents at beginning of the year	104,584	60,141	55,983
Cash and cash equivalents at end of the year	232,237	104,584	60,141
Cash paid during the year for:
Interest	27,514	29,215	32,494
Income taxes	12,728	21,529	18,587
Supplemental non-cash disclosures:
Loans transferred to other real estate	$ 413	$ 958	$ 5,740