Revolving Line of Credit and Long Term Debt - Terms (Details)			2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended			13 Months Ended
	Jul. 31, 2015 USD ($)	May. 09, 2014 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jul. 30, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jul. 30, 2015 USD ($)	Jun. 17, 2013 USD ($)	May. 09, 2013 USD ($)
Long-term debt
Loss on extinguishment of debt								$ 1,750,000	$ 2,894,000	$ 7,922,000
Long-term debt, amount outstanding								$ 182,688,000
2015 Credit Agreement
Long-term debt
Deferred financing fees	$ 3,400,000
2015 Credit Agreement | Actual
Long-term debt
Secured net leverage ratio								1.3
2015 Credit Agreement | Maximum
Long-term debt
Secured net leverage ratio								3.75
First Lien Credit Agreement
Long-term debt
Loss on extinguishment of debt	1,100,000
Write-off of unamortized deferred financing fees	995,000
Loss on original issue discount	$ 117,000
Long-term debt, amount outstanding									408,456,000
Original issue discount									312,000
First Lien Credit Agreement | LIBOR - Eurodollar rate
Long-term debt
Variable rate basis, floor (as a percent)					1.00%
Term Loan | 2015 Credit Agreement
Long-term debt
Term of debt instrument	5 years
Face amount of debt	$ 185,000,000
Frequency of periodic payment			quarterly
Periodic payment required			$ 2,300,000
Commencement date of payments			Dec. 31, 2015
Long-term debt, amount outstanding								$ 182,688,000
Term Loan | First Lien Credit Agreement
Long-term debt
Face amount of debt					$ 345,000,000						$ 345,000,000
Payments on debt	$ 183,200,000			$ 223,000,000
Loss on extinguishment of debt								638,000
Write-off of unamortized deferred financing fees								489,000
Loss on original issue discount								149,000
Original issue discount					3,500,000						$ 3,500,000
Term Loan | First Lien Credit Agreement | June 2012 through March 31, 2013
Long-term debt
Frequency of periodic payment							quarterly
Periodic payment required							$ 863,000
Term Loan | First Lien Credit Agreement | June 30, 2013 through March 31, 2014
Long-term debt
Frequency of periodic payment						quarterly
Periodic payment required						$ 979,000
Term Loan | First Lien Credit Agreement | June 30, 2014 through April 20, 2018
Long-term debt
Frequency of periodic payment											quarterly
Periodic payment required											$ 1,100,000
Term Loan | First Lien Credit Agreement May 2013 Amendment
Long-term debt
Deferred financing fees													$ 365,000
Increase in borrowing capacity													$ 50,000,000
Term Loan | First Lien Credit Agreement June 2013 Amendment
Long-term debt
Deferred financing fees												$ 486,000
Term Loan | First Lien Credit Agreement May 2014 Amendment
Long-term debt
Deferred financing fees		$ 508,000
Increase in borrowing capacity		35,000,000
Term Loan | Second Lien Credit Agreement
Long-term debt
Face amount of debt					95,000,000						95,000,000
Payments on debt		$ 10,000,000
Loss on extinguishment of debt									2,900,000	7,900,000
Write-off of unamortized deferred financing fees									1,500,000	4,100,000
Loss on original issue discount									921,000	2,300,000
Original issue discount					950,000						950,000
Lenders fees for extinguishment of debt									497,000	$ 1,500,000
Revolver | 2015 Credit Agreement
Long-term debt
Term of debt instrument	5 years
Maximum borrowing capacity	$ 75,000,000
Long-term debt, amount outstanding								0
Letters of credit outstanding								65,000
Available borrowing capacity								$ 74,900,000
Commitment fee, unused amounts (as a percent)			0.375%
Revolver | 2015 Credit Agreement | LIBOR
Long-term debt
Variable rate, basis spread (as a percent)			1.50%
Revolver | 2015 Credit Agreement | Adjusted Base Rate (ABR)
Long-term debt
Variable rate, basis spread (as a percent)			0.50%
Revolver | First Lien Credit Agreement
Long-term debt
Maximum borrowing capacity					$ 30,000,000						$ 30,000,000
Long-term debt, amount outstanding									$ 0
Commitment fee, unused amounts (as a percent)								0.50%