Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Operating Leases, Rent Expense, Net	$ 8,100	$ 6,200	$ 6,900
Buildings and Improvements, Gross	83,431	82,494
Operating Leases, Future Minimum Payments Due, Next Twelve Months	8,547
Operating Leases, Future Minimum Payments, Due in Two Years	7,999
Operating Leases, Future Minimum Payments, Due in Three Years	7,536
Operating Leases, Future Minimum Payments, Due in Four Years	6,628
Operating Leases, Future Minimum Payments, Due in Five Years	4,986
Operating Leases, Future Minimum Payments, Due Thereafter	8,879
Operating Leases, Future Minimum Payments Due	44,575
Land and Land Improvements	33,971	33,971
Furniture Fixtures And Equipment Gross	40,025	51,320
Leasehold Improvements, Gross	18,958	18,160
Construction in Progress, Gross	1,999	848
Property, Plant and Equipment, Gross	178,384	186,793
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(59,849)	(72,975)
Premises and equipment, net	118,535	113,818
Depreciation, Nonproduction	$ 7,700	$ 6,000	$ 6,000