Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ (10,517)	$ 3,423	$ 9,841	$ 2,951	$ 13,802	$ 8,083	$ 5,275	$ 198	$ 5,698	$ 27,358	$ 41,013
Weighted-average shares-basic									21,417,486	21,218,233	19,933,652
Restricted stock award									196,957	234,307	112,255
Weighted-average shares-diluted									21,614,443	21,452,540	20,045,907
Earnings Per Share, Basic	$ (0.49)	$ 0.16	$ 0.46	$ 0.14	$ 0.65	$ 0.38	$ 0.25	$ 0.01	$ 0.27	$ 1.29	$ 2.06
Earnings Per Share, Diluted	$ (0.49)	$ 0.16	$ 0.45	$ 0.14	$ 0.64	$ 0.38	$ 0.25	$ 0.01	$ 0.26	$ 1.28	$ 2.05