Net Income Per Share of Common Stock (Details)	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Common stock dividend declared, percent						2.50%	20.00%
Average shares outstanding	15,493,506	15,507,191	15,577,599	15,634,284	15,847,690	15,935,751	15,969,060