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Earnings Per Common Share, Additional Information (Details) - Options to purchase common stock [Member] - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Options excluded from computation of earnings per share (in shares) 0 6,562
Weighted average price (in dollars per share) $ 0.00 $ 17.88