Parent Company Financial Statements (Statements of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Salaries and employee benefits									$ 32,609	$ 29,689	$ 28,627
Furniture, equipment and data processing									7,051	5,079	4,773
Interest on borrowings									3,137	5,363	8,948
Net occupancy									5,449	4,365	3,949
Income before income taxes	7,984	9,318	9,283	8,330	6,082	9,247	9,306	9,675	34,915	34,310	37,958
Income tax benefit	(3,560)	(2,952)	(2,952)	(2,668)	(1,904)	(2,992)	(2,894)	(3,092)	(12,132)	(10,882)	(11,781)
Net Income	4,424	6,366	6,331	5,662	4,178	6,255	6,412	6,583	22,783	23,428	26,177
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Dividend income from subsidiaries									13,500	13,400	15,400
Fees from subsidiaries									20,930	20,070	18,048
Other income									270	170	13
Total operating income									34,700	33,640	33,461
Salaries and employee benefits									13,354	13,007	11,417
Furniture, equipment and data processing									4,570	3,971	3,296
Interest on borrowings									2,532	2,546	2,614
Depreciation and amortization									1,197	1,196	1,194
Compensation expense									596	538	1,025
Net occupancy									523	492	473
Other operating expenses									1,454	1,056	822
Total operating expenses									24,226	22,806	20,841
Income before equity in undistributed earnings of subsidiaries and income taxes									10,474	10,834	12,620
Equity in undistributed earnings of subsidiaries									11,233	11,647	12,441
Income before income taxes									21,707	22,481	25,061
Income tax benefit									1,076	947	1,116
Net Income									$ 22,783	$ 23,428	$ 26,177