Goodwill and Other Intangible Assets - (Details 1) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 49,962	$ 49,962
Accumulated Amortization	(27,451)	(25,888)
Net Carrying Amount	22,511	24,074
Core Deposit Intangibles
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	47,992	47,992
Accumulated Amortization	(26,718)	(25,188)
Net Carrying Amount	21,274	22,804
Customer Relationship Intangible
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,970	1,970
Accumulated Amortization	(733)	(700)
Net Carrying Amount	$ 1,237	$ 1,270