CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 29,724	$ 24,051	$ 16,096
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	4,700	6,000	8,500
Depreciation of premises and equipment	3,174	3,083	3,113
Foreclosed and repossessed property valuation adjustments	642	618	0
Net gain on sale of premises	(211)	0	0
Net amortization of premium and discount	1,768	797	335
Net amortization of intangibles	951	1,091	1,209
Non–cash charitable contribution	990	0	0
Share-based compensation	1,394	909	708
Deferred Income tax benefit	(863)	(688)	(1,500)
Earnings from bank-owned life insurance	(1,939)	(1,887)	(1,794)
Net gains on loan sales and commissions on loans originated for others	(5,074)	(4,052)	(4,352)
Net realized gains on securities	(698)	(729)	(314)
Net impairment losses recognized in earnings	191	417	3,137
Net (gains) losses on interest rate swap contracts	(6)	36	(697)
Equity in losses of unconsolidated subsidiaries	213	337	0
Proceeds from sales of loans	208,275	201,450	250,467
Loans originated for sale	(206,242)	(201,771)	(253,442)
(Increase) decrease in other assets	(2,804)	646	(11,796)
Increase (decrease) in other liabilities	3,014	131	(3,045)
Net cash provided by operating activities	37,199	30,439	6,625
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(115,208)	(122,240)	0
Purchases of other investment securities available for sale	(5,000)	(40,886)	(304)
Purchases of mortgage-backed securities held to maturity	(53,720)	0	0
Proceeds from sale of mortgage-backed securities available for sale	46,889	64,275	0
Proceeds from sale of other investment securities available for sale	9,572	34,822	1,604
Maturities and principal payments of mortgage-backed securities available for sale	115,500	150,062	171,330
Maturities and principal payments of other investment securities available for sale	855	12,000	17,475
Maturities and principal payments of mortgage-backed securities held to maturity	1,489	0	0
Net increase in loans	(148,652)	(77,382)	(79,661)
Purchases of loans, including purchased interest	(9,677)	(2,842)	(5,421)
Proceeds from the sale of property acquired through foreclosure or repossession	2,190	821	607
Proceeds from sale of premises and equipment, net of selling costs	1,279	0	0
Purchases of premises and equipment	(3,644)	(1,683)	(5,557)
Purchases of bank-owned life insurance	0	(5,000)	0
Equity investments in real estate limited partnerships	(449)	(1,798)	(295)
Payment of deferred acquisition obligation	0	0	(2,509)
Net cash (used in) provided by investing activities	(158,576)	10,149	97,269
Cash flows from financing activities:
Net increase in deposits	89,985	113,320	132,142
Net (decrease) increase in other borrowings	(3,601)	1,858	(2,733)
Proceeds from Federal Home Loan Bank advances	514,475	204,540	276,670
Repayment of Federal Home Loan Bank advances	(472,747)	(313,144)	(498,960)
Issuance of treasury stock, including deferred compensation plan activity	0	44	53
Proceeds from the issuance of common stock under dividend reinvestment plan	754	1,002	1,106
Proceeds from the exercise of stock options and issuance of other compensation-related equity instruments	885	785	364
Tax benefit (expense) from stock option exercises and issuance of other compensation-related equity instruments	115	65	(26)
Cash dividends paid	(14,205)	(13,582)	(13,440)
Net cash provided by (used in) financing activities	115,661	(5,112)	(104,824)
Net (decrease) increase in cash and cash equivalents	(5,716)	35,476	(930)
Cash and cash equivalents at beginning of year	92,736	57,260	58,190
Cash and cash equivalents at end of year	87,020	92,736	57,260
Noncash Investing and Financing Activities:
Loans charged off	3,834	5,402	5,162
Loans transferred to property acquired through foreclosure or repossession	2,031	3,255	2,210
Reclassification of other-than-temporary impairment charge (see Note 4)	0	0	1,859
Supplemental Disclosures:
Interest payments	35,594	44,244	61,561
Income tax payments	$ 13,390	$ 10,663	$ 9,776