Stockholders' Equity - Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Equity [Abstract]
Net income attributable to common stockholders — basic and diluted	$ 1,147	$ 2,554	$ 6,431	$ 9,351
Weighted average number of common shares outstanding	29,449	29,149	29,449	29,149
Dilutive effect of restricted stock grants after application of the treasury stock method	652	235	334	160
Dilutive shares outstanding	30,101	29,384	29,783	29,309
Basic and diluted earnings per share attributable to common stockholders (in dollars per share)	$ 0.04	$ 0.09	$ 0.22	$ 0.32