Goodwill and Other Intangible Assets - Changes in Mortgage Servicing Rights (Details) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning of period	$ 5,523	$ 5,406	$ 5,509	$ 5,519
Servicing rights capitalized	499	236	881	359
Amortization of servicing rights	(326)	(264)	(694)	(507)
Changes in valuation allowance	0	0	0	7
End of period	5,696	5,378	5,696	5,378
Mortgage loans serviced for others	$ 832,318	$ 761,413	$ 832,318	$ 761,413