Earnings Per Common Share - Additional Information (Details)	3 Months Ended	6 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014 Stock options [Member]	Jun. 30, 2013 Stock options [Member]	Jun. 30, 2014 Stock options [Member]	Jun. 30, 2013 Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options for aggregate common shares	339,863	339,863	337,696	337,696	232,000
Securities not included in the computation of diluted earnings per share because the effect would be antidilutive						300,196	339,863,000	300,196	339,863
Dilutive effect of stock options	10,508	7,374