Net Income Per Share (Computation of Weighted Average Shares Outstanding Basic and Diluted) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Common shares	20,159,197	20,414,667	20,116,250	20,413,238
Vested restricted stock units	220,360	532,160	281,787	525,609
Basic number of weighted average shares outstanding	20,379,557	20,946,827	20,398,037	20,938,847
Dilutive effect of restricted stock and restricted stock units	5,067	5,884	17,944	10,661
Dilutive number of weighted average shares outstanding	20,384,624	20,952,711	20,415,981	20,949,508
Shares outstanding excluded from calculation of diluted net income per share	0	0	7,368	0