Other Intangible Assets (Textual) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 10,046	$ 8,444	$ 3,345
Lake Michigan
Finite-Lived Intangible Assets [Line Items]
Non-compete agreements recorded in acquisition				$ 600
Core deposit intangible assets
Finite-Lived Intangible Assets [Line Items]
Remaining weighted-average useful life of intangible assets acquired	8 years 5 months
Amortization of intangible assets	$ 5,200	4,100	$ 2,000
Non-compete intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 328	$ 248
Non-compete intangible assets | Lake Michigan
Finite-Lived Intangible Assets [Line Items]
Remaining weighted-average useful life of intangible assets acquired		1 year