Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Carrying Amounts and Fair Values of Company's Amended and Restated Senior Credit Facilities and Contingent Consideration Liability

The carrying amounts and fair values of the Company’s Amended and Restated Senior Credit Facility, 12.875% Senior Notes, 6.125% Senior Notes, 9.0% and 9.5% Revenue Bonds and contingent consideration liability as of December 31, 2013 and 2012 were as follows (in thousands):

	Carrying Amount				Fair Value
	December 31,				December 31,
	2013		2012		2013		2012
Amended and Restated Senior Credit Facility	$	346,000	$	300,000	$	346,000	$	300,000
12.875% Senior Notes due 2018	$	96,216	$	147,757	$	118,706	$	181,500
6.125% Senior Notes due 2021	$	150,000	$	—	$	155,625	$	—
9.0% and 9.5% Revenue Bonds	$	24,920	$	25,561	$	24,920	$	25,561
Contingent consideration liability	$	6,500	$	6,120	$	6,500	$	6,120