Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 221,401	$ 221,525
Less accumulated depreciation and amortization	(57,162)	(49,435)
Total	164,239	172,090
Depreciation and amortization expense	12,300	10,900	$ 10,200
exit or disposal activity total expected cost	2,100
Exit or disposal cost, amount incurred in current period	514
Exit or disposal costs, remaining amount to be incurred in future periods	1,600
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	51,446	52,338
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	102,808	103,240
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	20,604	21,199
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	28,662	28,486
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	587	596
Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 17,294	$ 15,666