Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 segment	Sep. 30, 2011	Dec. 31, 2011
Segment Reporting [Abstract]
Number of Primary Operating Segments			2
Number of Reportable Segments			3
Segment Reporting Information [Line Items]
Portfolio loans	$ 2,208,599		$ 2,208,599		$ 2,197,684
Goodwill	30,334		30,334		30,334
Intangibles, net	7,846		7,846		9,285
Deposits	2,550,933		2,550,933		2,791,353
Borrowings	358,185		358,185		341,626
Total assets	3,193,692		3,193,692		3,377,779
Income Statement Information
Net interest income (expense)	37,484	26,769	102,246	80,481
Provision for loan losses	11,937	8,072	16,221	16,247
Noninterest Income	7,832	8,726	12,660	17,907
Noninterest Expense	21,282	18,302	64,060	54,291
Income before income tax expense	12,097	9,121	34,625	27,850
Banking
Segment Reporting Information [Line Items]
Portfolio loans	2,208,599		2,208,599		2,197,684
Goodwill	30,334		30,334		30,334
Intangibles, net	7,846		7,846		9,285
Deposits	2,535,930		2,535,930		2,773,482
Borrowings	215,051		215,051		213,480
Total assets	3,075,740		3,075,740		3,278,328
Income Statement Information
Net interest income (expense)	38,627	28,105	105,646	84,511
Provision for loan losses	11,937	8,072	16,221	16,247
Noninterest Income	5,418	5,105	5,571	9,721
Noninterest Expense	18,063	15,454	54,424	45,639
Income before income tax expense	14,045	9,684	40,572	32,346
Wealth Management
Segment Reporting Information [Line Items]
Portfolio loans	0		0		0
Goodwill	0		0		0
Intangibles, net	0		0		0
Deposits	30,688		30,688		39,440
Borrowings	60,553		60,553		45,565
Total assets	96,660		96,660		90,068
Income Statement Information
Net interest income (expense)	(252)	(304)	(566)	(941)
Provision for loan losses	0	0	0	0
Noninterest Income	2,088	3,201	6,718	7,683
Noninterest Expense	1,968	2,016	5,761	5,914
Income before income tax expense	(132)	881	391	828
Corporate and Intercompany
Segment Reporting Information [Line Items]
Portfolio loans	0		0		0
Goodwill	0		0		0
Intangibles, net	0		0		0
Deposits	(15,685)		(15,685)		(21,569)
Borrowings	82,581		82,581		82,581
Total assets	21,292		21,292		9,383
Income Statement Information
Net interest income (expense)	(891)	(1,032)	(2,834)	(3,089)
Provision for loan losses	0	0	0	0
Noninterest Income	326	420	371	503
Noninterest Expense	1,251	832	3,875	2,738
Income before income tax expense	$ (1,816)	$ (1,444)	$ (6,338)	$ (5,324)