Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Allowance for loan losses	$ 17,430	$ 16,581
Loans	26,239	19,073
Deferred compensation	17,060	9,678
Net unrealized losses on securities	6,065	4,777
Impairment of assets	3,271	4,397
Net operating loss carryforwards	3,681	1,414
Other	7,499	3,315
Gross deferred tax assets	81,245	59,235
Valuation allowance on state net operating loss carryforwards	0	0
Total deferred tax assets	81,245	59,235
Deferred tax liabilities
FDIC Indemnification Asset	1,927	4,193
Investment in partnerships	2,507	2,613
Core deposit intangible	3,386	2,257
Depreciation	673	2,801
Mortgage servicing rights	4,032	0
Subordinated debt	4,287	4,490
Other	2,364	738
Total deferred tax liabilities	19,176	17,092
Net deferred tax assets	$ 62,069	$ 42,143