Goodwill and Other Intangible Assets - (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 47,952	$ 47,952
Accumulated Amortization	(20,838)	(19,141)
Net Carrying Amount	27,114	28,811
Core Deposit Intangibles
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	45,982	45,982
Accumulated Amortization	(20,236)	(18,572)
Net Carrying Amount	25,746	27,410
Customer Relationship Intangible
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,970	1,970
Accumulated Amortization	(602)	(569)
Net Carrying Amount	$ 1,368	$ 1,401