Earnings Per Common Share - Share repurchase activities (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Total number of shares purchased under share repurchase program | shares	178,000
Average price paid per share in share repurchase program | $ / shares	$ 7.04
Total number of shares purchased as part of publicly announced program | shares	178,000
Value of shares repurchased under program | $	$ 1,300,000
January 1 to January 31, 2016
Approximate dollar value of shares that may yet be purchased under the plans or programs | $	$ 15,000,000
February 1 to February 29, 2016
Total number of shares purchased under share repurchase program | shares	178,000
Average price paid per share in share repurchase program | $ / shares	$ 7.04
Total number of shares purchased as part of publicly announced program | shares	178,000
Approximate dollar value of shares that may yet be purchased under the plans or programs | $	$ 13,746,730
March 1 to March 31, 2016
Approximate dollar value of shares that may yet be purchased under the plans or programs | $	$ 13,746,730