Debt - Additional Information (Detail) (USD $) | 1 Months Ended | 3 Months Ended | 9 Months Ended | |
Jun. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Amortization and write-offs of loan origination costs | ' | $1,100,000 | $1,000,000 | $4,408,000 | $7,814,000 | ' |
Company amortized to interest expense | ' | 300,000 | 300,000 | 1,000,000 | 400,000 | ' |
Loss on extinguishment of debt | ' | ' | ' | ' | -4,355,000 | ' |
Estimated fair value of credit facility | ' | 845,400,000 | ' | 845,400,000 | ' | 1,030,000,000 |
Debt instrument principal amount repriced | 684,400,000 | ' | ' | ' | ' | ' |
Debt instrument, interest rate terms | 'The applicable interest rates have been reduced to either LIBOR plus 2.75% or the base rate plus 1.75%, and the LIBOR floor has been reduced from 1.00% to 0.75%, subject to a step-down at any time that the consolidated net senior secured leverage ratio is less than 2.75 times, to 2.50% in the case of the LIBOR margin, and 1.50% in the case of the base rate margin | ' | ' | ' | ' | ' |
LIBOR Plus [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 2.50% | ' | ' | ' | ' | ' |
Debt Instrument, Interest Rate, Basis for Effective Rate | '2.50% in the case of the LIBOR margin | ' | ' | ' | ' | ' |
Base Rate Plus [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 1.50% | ' | ' | ' | ' | ' |
Debt Instrument, Interest Rate, Basis for Effective Rate | '1.50% in the case of the base rate margin | ' | ' | ' | ' | ' |
Term Loan B-1 [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument principal amount repriced | 620,200,000 | ' | ' | ' | ' | ' |
Term Loan B-2 [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument principal amount repriced | $64,200,000 | ' | ' | ' | ' | ' |
Term B Loans [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Minimum senior secured leverage ratio required | 2.75 | ' | ' | ' | ' | ' |
Term loan maturity date | 8-Jun-19 | ' | ' | ' | ' | ' |
Term B Loans [Member] | LIBOR Plus [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 2.75% | ' | ' | ' | ' | ' |
Term B Loans [Member] | Base Rate Plus [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 1.75% | ' | ' | ' | ' | ' |
Term B Loans [Member] | Interest Rate Floor [Member] | ' | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 0.75% | ' | ' | ' | ' | ' |
Debt instrument, basis spread on variable rate | 1.00% | ' | ' | ' | ' | ' |