Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of finite-lived intangible assets
Gross Carrying Amount	$ 47,952	$ 35,696
Accumulated Amortization	(19,141)	(13,072)
Net Carrying Amount	28,811	22,624
Core deposit intangible
Summary of finite-lived intangible assets
Gross Carrying Amount	45,982	33,726
Accumulated Amortization	(18,572)	(12,635)
Net Carrying Amount	27,410	21,091
Customer relationship intangible
Summary of finite-lived intangible assets
Gross Carrying Amount	1,970	1,970
Accumulated Amortization	(569)	(437)
Net Carrying Amount	$ 1,401	$ 1,533