Premises and Equipment (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	[1]	$ 76,111	$ 52,980
Accumulated depreciation and amortization		(30,152)	(29,094)
Premises and equipment, net		45,959	23,886
Gain (Loss) on Disposition of Assets		(1,130)	0	$ 0
Gain (Loss) on Disposition of Property Plant Equipment		0	0
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation, Depletion and Amortization		3,300	2,700	2,700
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		3,102	3,046
Buildings and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		37,926	29,984
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross		35,083	19,950
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization		(3,300)	(3,000)
Depreciation, Depletion and Amortization		337	335	$ 296
Capitalized Computer Software, Gross		$ 3,800	$ 3,600

[1] Increase is primarily due to assets acquired in connection with the SBM acquisition. Refer to Note 2 for further details.