Initial Public Offering and Tax Receivable Agreement (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended					1 Months Ended	12 Months Ended
	Jun. 02, 2011	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2011 debtors	Dec. 31, 2012	Mar. 31, 2011 owner	Jun. 02, 2011 Class B Common Stock	Jun. 30, 2011 Initial Public Offering	Dec. 31, 2011 Initial Public Offering	Dec. 31, 2011 Initial Public Offering Repayments to Unaffiliated Debt Holders
Initial Public Offering [Line Items]
Proceeds from initial public offering	$ 187,200,000
Shares issued in public offering (in shares)								15,600,000
Common stock price at IPO (in dollars per share)	$ 12
Proceeds from IPO, after underwriter commissions	176,900,000
Proceeds from IPO, after paying debt and direct issuance costs	150,000,000
Debts paid from IPO proceeds	20,600,000
Incurred costs									2,300,000	500,000
Number of unaffiliated debt holders paid with IPO proceeds (in debtors)				3
Direct IPO costs	5,900,000
Debt exchanged for common stock	279,200,000
Unpaid dividends exchanged for common stock	81,700,000
Common shares exchanged for forgiveness of debt and unpaid dividends (in shares)	30,079,420
Conversion ratio for class B common stock to common stock (in shares)							1
Interest expense reduction from IPO transactions	400,000
Percentage of cash savings from pre-IPO NOLs due to pre-IPO stockholders		90.00%
Tax receivable agreement, tax benefit schedule days to submission						45 days
Tax receivable agreement, number of largest owners pre initial public offering						2
Tax receivable agreement, tax benefit schedule days to response						45 days
Tax receivable agreement, tax benefit schedule days to resolve notice						30 days
Tax receivable agreement, tax benefit schedule days to payment after acceptance						5 days
Cash payment including interest to pre-IPO stockholders pursuant to tax receivable agreement		27,200,000
Interest included in cash payment to pre-IPO stockholders pursuant to tax receivable agreement		300,000
Estimated remaining cash payment to pre-IPO stockholders			5,643,000		7,987,000
Pre-initial public offering, operating loss carryforwards, reduction			7,800,000
Reduction in TRA liability			$ 2,400,000