Goodwill and Other Intangible Assets - Changes in Mortgage Servicing Rights (Details) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning of period	$ 5,696	$ 5,378	$ 5,509	$ 5,519
Servicing rights capitalized	365	365	1,246	724
Amortization of servicing rights	(289)	(561)	(983)	(1,068)
Changes in valuation allowance	0	243	0	250
End of period	5,772	5,425	5,772	5,425
Mortgage loans serviced for others	$ 848,160	$ 779,701	$ 848,160	$ 779,701