Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 27,187	$ 23,956
Accumulated Amortization and Fair Value Adjustments	13,640	11,776
Net Carrying Amount	13,547	12,180
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,520	0
Accumulated Amortization and Fair Value Adjustments	138	0
Net Carrying Amount	1,382	0
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,227	13,397
Accumulated Amortization and Fair Value Adjustments	7,758	6,726
Net Carrying Amount	6,469	6,671
Mortgage Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,440	10,559
Accumulated Amortization and Fair Value Adjustments	5,744	5,050
Net Carrying Amount	$ 5,696	$ 5,509