Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 2,056	$ (2,391)
Net Income Allocated to Class A Common Stock	2,035	(2,367)
Net Income Allocated to Class B Common Stock	$ 21	$ (24)
Common Stock Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Shares Outstanding, Basic	49,080	49,080
Weighted Average Shares Outstanding, Diluted	49,080	49,080
Basic earnings per share	$ 0.04	$ (0.05)
Diluted earnings per share	$ 0.04	$ (0.05)
Common Stock Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Shares Outstanding, Basic and Diluted	1,002	1,002
Basic earnings per share	$ 0.02	$ (0.02)
Diluted earnings per share	$ 0.02	$ (0.02)