Net Income Per Share of Common Stock (Details) - shares	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Common stock dividend declared, percent									2.50%	0.00%	2.50%
Average shares outstanding	15,927,663	15,942,178	15,986,695	16,023,053	15,802,792	15,798,638	15,841,788	15,969,254	16,364,441	16,243,882	16,334,145