Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting [Abstract]
Number of Primary Operating Segments			2
Number of Reportable Segments			2
Segment Reporting Information [Line Items]
Goodwill	$ 30,334		$ 30,334		$ 30,334
Intangibles, net	4,767		4,767		5,418
Deposits	2,465,450		2,465,450		2,534,953
Total assets	3,175,441		3,175,441		3,170,197
Income Statement Information
Net interest income (expense)	28,742	33,308	59,108	70,207
Provision for loan losses	(878)	6,573	(5,209)	2,464
Noninterest Income	3,405	(1,677)	7,327	1,237
Noninterest Expense	20,445	21,147	41,547	41,432
Income before income tax expense	10,824	17,057	19,679	32,476
Banking
Segment Reporting Information [Line Items]
Total assets	3,064,332		3,064,332		3,051,256
Income Statement Information
Net interest income (expense)	29,109	34,404	59,929	72,261
Provision for loan losses	(878)	6,573	(5,209)	2,464
Noninterest Income	1,325	(3,487)	3,024	(3,442)
Noninterest Expense	17,833	18,428	35,464	35,152
Income before income tax expense	11,723	19,062	22,280	36,131
Wealth Management
Segment Reporting Information [Line Items]
Total assets	92,946		92,946		101,026
Income Statement Information
Net interest income (expense)	(24)	(133)	(42)	(126)
Provision for loan losses	0	0	0	0
Noninterest Income	2,074	1,811	4,290	4,605
Noninterest Expense	1,811	1,779	3,643	3,835
Income before income tax expense	239	(101)	605	644
Corporate and Intercompany
Segment Reporting Information [Line Items]
Total assets	18,163		18,163		17,915
Income Statement Information
Net interest income (expense)	(343)	(963)	(779)	(1,928)
Provision for loan losses	0	0	0	0
Noninterest Income	6	(1)	13	74
Noninterest Expense	801	940	2,440	2,445
Income before income tax expense	$ (1,138)	$ (1,904)	$ (3,206)	$ (4,299)