Capital Stock - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 18, 2013
Equity [Abstract]
Common stock share authorized to repurchase	7,040,670		7,040,670
Common stock shares authorized to repurchase					10,000,000
Stock repurchased during period, shares	373,883	100,000	373,883	100,000
Stock repurchased during period, value	$ 6,280	$ 1,912	$ 6,280	$ 1,912