Accounting Policies and Basis of Presentation Accounting Policies and Basis of Presentation (Recently Adopted Accounting Standards) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gain on acquisition	$ 837		$ 0	$ 5,831	$ 42,930
First CornerStone Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period	$ 837
Gain on acquisition				2,959
North Milwaukee State Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		$ 1,200
Gain on acquisition				$ 2,872