Mergers and Acquisitions (Pro Forma Information) (Details) - Talmer Bank [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition
Net interest and other income	$ 176,102	$ 163,933	$ 504,831	$ 460,791
Net Income	$ 9,320	$ 38,849	$ 84,808	$ 93,764
Earnings per share:
Basic (in dollars per share)	$ 0.13	$ 0.55	$ 1.20	$ 1.39
Diluted (in dollars per share)	$ 0.13	$ 0.55	$ 1.19	$ 1.37

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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