Segment Reporting (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 segment	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting [Abstract]
Number of Primary Operating Segments									2
Segment Reporting Information [Line Items]
Goodwill	$ 30,334				$ 30,334				$ 30,334	$ 30,334
Intangibles, net	5,418				7,406				5,418	7,406
Deposits	2,534,953				2,658,851				2,534,953	2,658,851
Total assets	3,170,197				3,325,786				3,170,197	3,325,786	3,377,779
Income Statement Information
Net interest income (expense)	32,371	32,574	33,308	36,899	40,051	37,484	34,133	30,629	135,152	142,297	112,685
Provision for loan losses									4,332	22,790	16,103
Noninterest Income	4,946	3,716	(1,677)	2,914	(3,576)	7,832	845	3,983	9,899	9,084	18,508
Noninterest Expense	28,199	21,008	21,147	20,285	22,389	21,053	21,185	21,134	90,639	85,761	76,865
Income before income tax expense	4,481	13,123	17,057	15,419	7,517	12,326	13,512	9,475	50,080	42,830	38,225
Banking
Segment Reporting Information [Line Items]
Total assets	3,051,256				3,195,096				3,051,256	3,195,096	3,278,328
Income Statement Information
Net interest income (expense)									138,701	146,726	118,063
Provision for loan losses									4,332	22,790	16,103
Noninterest Income									149	(834)	7,526
Noninterest Expense									78,021	73,500	66,548
Income before income tax expense									56,497	49,602	42,938
Wealth Management
Segment Reporting Information [Line Items]
Total assets	101,026				112,020				101,026	112,020	90,068
Income Statement Information
Net interest income (expense)									(378)	(652)	(1,245)
Provision for loan losses									0	0	0
Noninterest Income									9,603	9,506	10,486
Noninterest Expense									7,476	7,716	7,236
Income before income tax expense									1,749	1,138	2,005
Corporate and Intercompany
Segment Reporting Information [Line Items]
Total assets	17,915				18,670				17,915	18,670	9,383
Income Statement Information
Net interest income (expense)									(3,171)	(3,777)	(4,133)
Provision for loan losses									0	0	0
Noninterest Income									147	412	496
Noninterest Expense									5,142	4,545	3,081
Income before income tax expense									$ (8,166)	$ (7,910)	$ (6,718)