Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 4,006	$ 3,780
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	562	560
Provision for loan losses	3,180	2,725
Provision for indemnifications	225	125
Provision for other real estate owned losses	150	200
Share-based compensation	140	120
Accretion of discounts and amortization of premiums on securities, net	176	191
Net realized (gain) loss on calls of securities	(2)
Realized (gain) losses on sales of other real estate owned	(7)	13
Proceeds from sales of loans held for sale	205,469	179,602
Origination of loans held for sale	(178,174)	(173,296)
Change in other assets and liabilities:
Accrued interest receivable	107	18
Other assets	(175)	(1,645)
Accrued interest payable	(40)	(4)
Other liabilities	(1,235)	2,470
Net cash provided by operating activities	34,382	14,859
Investing activities:
Proceeds from maturities, calls and sales of securities available for sale	7,179	7,802
Purchases of securities available for sale	(5,882)	(7,023)
Redemption of Federal Home Loan Bank stock	219
Net increase in customer loans	(4,162)	(11,912)
Other real estate owned improvements		(205)
Proceeds from sales of other real estate owned	866	944
Purchases of corporate premises and equipment, net	(1,318)	(282)
Net cash used in investing activities	(3,098)	(10,676)
Financing activities:
Net increase in demand, interest-bearing demand and savings deposits	12,513	11,915
Net (decrease) increase in time deposits	(2,233)	2,223
Net increase (decrease) in borrowings	4,473	(2,746)
Proceeds from exercise of stock options	17	259
Issuance of common stock		42
Cash dividends	(948)	(957)
Net cash provided by financing activities	13,822	10,736
Net increase in cash and cash equivalents	45,106	14,919
Cash and cash equivalents at beginning of period	25,620	11,507
Cash and cash equivalents at end of period	70,726	26,426
Supplemental disclosure
Interest paid	2,188	2,843
Income taxes paid	508	228
Supplemental disclosure of noncash investing and financing activities
Unrealized (losses) gains on securities available for sale	(537)	125
Loans transferred to other real estate owned	70	102
Pension adjustment	(13)	9
Unrealized gain on cash flow hedging instrument	49	5
Supplemental Disclosures of noncash investing and financing activities (Member)
Supplemental disclosure of noncash investing and financing activities
Unrealized (losses) gains on securities available for sale	$ (827)	$ 192