Nature of Business (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 item	Mar. 31, 2013	Mar. 31, 2014 Class A common stock	Dec. 31, 2013 Class A common stock	Mar. 31, 2014 Class B common stock	Dec. 31, 2013 Class B common stock
Nature of Business
Number of operating segments	1
Numerator for earnings (loss) per common share calculation:
Net income (loss)	$ 248	$ (525)
Denominator for earnings (loss) per common share calculation:
Weighted-average common shares, basic	42,172,000	1,000
Effect of dilutive securities:
Stock options and restricted stock	437,000
Weighted-average common shares, diluted	42,609,000	1,000
Shares excluded from the computation of diluted income (loss) per common share	8,200,000
Par value of common stock (in dollars per share)			$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001