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Mergers and Acquisitions - Pro Forma Information (Details)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
Business Combinations [Abstract]  
Revenue $ 298.5
Net income applicable to common shareholders $ 54.1
Earnings per share:  
Basic and diluted earnings per common share | $ / shares $ 1.28