Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended					1 Months Ended	12 Months Ended						12 Months Ended					12 Months Ended	1 Months Ended		12 Months Ended				0 Months Ended		12 Months Ended			1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Feb. 15, 2011	Feb. 01, 2011	Jul. 31, 2009	Dec. 31, 2011 Maverick Companies	Jul. 15, 2011 Revolving Credit Facility	Dec. 31, 2012 Revolving Credit Facility	Apr. 05, 2012 Revolving Credit Facility	Feb. 28, 2011 Revolving Credit Facility	Feb. 15, 2011 Revolving Credit Facility	Jul. 15, 2011 Revolving Credit Facility Minimum	Jul. 15, 2011 Revolving Credit Facility Maximum	Dec. 31, 2012 Alternate Base Rate Loans Minimum	Dec. 31, 2012 Alternate Base Rate Loans Maximum	Dec. 31, 2012 Eurodollar Loans Minimum	Dec. 31, 2012 Eurodollar Loans Maximum	Dec. 31, 2012 7.75% Senior Notes Due 2019 on and after February 15 2015	Dec. 31, 2012 7.75% Senior Notes Due 2019 Prior To February 15 2014	Oct. 31, 2012 7.125% Senior Notes	Apr. 30, 2006 7.125% Senior Notes	Dec. 31, 2012 7.125% Senior Notes	Oct. 16, 2012 7.125% Senior Notes	Apr. 05, 2012 7.125% Senior Notes	Dec. 31, 2011 7.125% Senior Notes	Jun. 13, 2011 7.75% Senior Notes due 2019	Feb. 15, 2011 7.75% Senior Notes due 2019	Dec. 31, 2012 7.75% Senior Notes due 2019	Dec. 31, 2011 7.75% Senior Notes due 2019	Dec. 31, 2011 7.75% Senior Notes due 2019 Maverick Companies	Feb. 28, 2011 11.625% Senior Secured Notes	Mar. 31, 2011 11.625% Senior Secured Notes	Dec. 31, 2012 11.625% Senior Secured Notes	Dec. 31, 2012 7.75% Senior Notes Due 2022	Oct. 16, 2012 7.75% Senior Notes Due 2022
Debt Instrument [Line Items]
Issuance of senior notes																				$ 225,000,000					$ 200,000,000	$ 275,000,000	$ 464,600,000						$ 293,300,000
Debt Instrument, Interest Rate																					7.125%			7.125%	7.75%		7.75%	7.75%				11.625%
Debt Instrument, Maturity Date	Aug. 01, 2014																				Apr. 15, 2016						Feb. 15, 2019						Oct. 15, 2022
Senior notes, aggregate principal amount			225,000,000	225,000,000															225,000,000						475,000,000									300,000,000
Tender and consents received		224,700,000																				223,300,000
Debt instrument, purchase price as a percentage of principal amount																									101.00%	100.00%	100.00%						100.00%
Portion of the net proceeds from the offering to be funded					186,300,000																								186,300,000
Debt instrument, frequency of periodic payment																											Semi-annually						Semi-annually
Debt instrument, redemption price																	100.00%
Percent redeemable																		35.00%															35.00%
Redemption price percentage of senior note																		107.75%															107.75%
Minimum amount outstanding after redemption																		65.00%															65.00%
Maximum period for redemption on senior note (in days)																		90 days															90 days
Debt instrument, repurchase price, percentage on principal amount plus accrued and unpaid interest																											101.00%						101.00%
Secured revolving credit facility										30,000,000
Line of credit facility, current borrowing capacity											165,000,000
Increase in total credit						100,000,000
Line of credit facility, maximum increase in borrowing capacity								250,000,000				225,000,000
Amount of assets held by non-guarantor subsidiaries																							0
Line of credit maturity date							Jan. 15, 2016
Marginal interest rate													1.50%	2.25%	2.50%	3.25%
Commitment fee							0.50%
Minimum consolidated interest coverage ratio floor							2.50
Maximum consolidated leverage ratio ceiling							4.00
Maximum consolidated senior secured leverage ratio							2.00
Borrowings outstanding							22,500,000
Letters of credit outstanding under the Credit Agreement							22,500,000
Total Available Credit under the agreement							227,500,000
Minimum Debt service coverage ratio	1.05
Termination of revolving credit facility									30,000,000
Wrote off unamortized debt issuance costs																			1,800,000												3,900,000
Debt instrument, unamortized discount																														9,200,000
Premium paid																			$ 6,100,000											$ 36,200,000