Earnings Per Common Share - Share repurchase activities (Details)	6 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($) $ / shares
Earnings Per Common Share
Average price paid per share in share repurchase program | $ / shares		$ 7.04
Approximate dollar value of shares that may yet be purchased under the plans or programs	$ 15,000,000	$ 15,000,000
Value of shares repurchased under program	$ 0	$ 1,300,000