Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions | Nov. 02, 2017 | Sep. 30, 2017 | Jun. 30, 2017 |
Fourth Amended and Restated Credit Agreement [Member] | Revolving Credit [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitments | | $ 368.5 | |
Bank Credit Facility [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitment outstanding | | $ 1,081 | |
Bank Credit Facility [Member] | Minimum [Member] | | | |
Subsequent Event [Line Items] | | | |
Interest coverage ratio | | 200.00% | |
Bank Credit Facility [Member] | Maximum [Member] | | | |
Subsequent Event [Line Items] | | | |
Leverage ratio | | 500.00% | |
Bank Credit Facility [Member] | Revolving Credit [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitments | | | $ 231.8 |
Expiration date of revolving credit commitments | | Nov. 2, 2022 | |
Line of credit facility covenant, Period to maturity | | 91 days | |
Debt instrument, payment terms | | The new revolver expires on the earliest of (i) November 2, 2022; (ii) 91 days prior to the final maturity of any term loan under the credit facility if $200.0 million or more remains outstanding under such term loan on that date; or (iii) six months prior to the scheduled maturity date of any affiliated subordinated indebtedness that is then outstanding. | |
Line of credit facility covenant, Period to maturity of subordinate debt | | 6 months | |
Bank Credit Facility [Member] | Term Loan A-1 [Member] | | | |
Subsequent Event [Line Items] | | | |
Expiration date of revolving credit commitments | | Nov. 2, 2022 | |
Line of credit facility covenant, Period to maturity | | 91 days | |
Debt instrument, payment terms | | Term Loan A-1 matures on the earliest of (i) November 2, 2022; (ii) 91 days prior to the final maturity of any term loan under the credit facility if $200.0 million or more remains outstanding under such term loan on that date; or (iii) six months prior to the scheduled maturity date of any affiliated subordinated indebtedness that is then outstanding, and is subject to quarterly reductions of $2.8 million beginning on December 31, 2017. | |
Line of credit facility covenant, Period to maturity of subordinate debt | | 6 months | |
Bank Credit Facility [Member] | Term Loan M [Member] | | | |
Subsequent Event [Line Items] | | | |
Expiration date of revolving credit commitments | | Jan. 15, 2025 | |
Debt instrument, payment terms | | If on or before May 2, 2018, Term Loan M is prepaid from the proceeds of a substantially concurrent borrowing of term loans with an interest rate less than the interest rate applicable to Term Loan M (calculated as provided in the new credit agreement), then the prepayment shall be accompanied by a fee equal to 1.00% of the aggregate principal amount of Term Loan M so prepaid. | |
Bank Credit Facility [Member] | Term Loan A [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitment outstanding | | $ 138.2 | |
Expiration date of revolving credit commitments | | Jan. 15, 2021 | |
Bank Credit Facility [Member] | Term Loan H [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitment outstanding | | $ 574.5 | |
Expiration date of revolving credit commitments | | Jan. 29, 2021 | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | Revolving Credit [Member] | | | |
Subsequent Event [Line Items] | | | |
Repayment of credit facility | $ 259.3 | | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | New Revolver [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitments | $ 375 | | |
Effective date for new revolving credit facility | Nov. 2, 2017 | | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | Term Loan A-1 [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitment outstanding | $ 250 | | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | Term Loan M [Member] | | | |
Subsequent Event [Line Items] | | | |
Revolving credit commitment outstanding | 800 | | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | Term Loan A [Member] | | | |
Subsequent Event [Line Items] | | | |
Repayment of credit facility | 138.2 | | |
Subsequent Event [Member] | Fourth Amended and Restated Credit Agreement [Member] | Term Loan H [Member] | | | |
Subsequent Event [Line Items] | | | |
Repayment of credit facility | $ 574.5 | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Minimum [Member] | | | |
Subsequent Event [Line Items] | | | |
Rate of commitment fees on the unused portion of revolving credit commitments | 0.25% | | |
Line of credit facility covenant, Remaining borrowing capacity prior to maturity | $ 200 | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Minimum [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 1.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Minimum [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 0.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Maximum [Member] | | | |
Subsequent Event [Line Items] | | | |
Rate of commitment fees on the unused portion of revolving credit commitments | 0.50% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Maximum [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 2.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Revolving Credit [Member] | Maximum [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 1.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | | | |
Subsequent Event [Line Items] | | | |
Quarterly principal payments of original principal amount | $ 3.1 | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | Minimum [Member] | | | |
Subsequent Event [Line Items] | | | |
Line of credit facility covenant, Remaining borrowing capacity prior to maturity | $ 200 | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | Minimum [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 1.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | Minimum [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 0.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | Maximum [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 2.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan A-1 [Member] | Maximum [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 1.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan M [Member] | | | |
Subsequent Event [Line Items] | | | |
Quarterly principal payments of original principal amount | $ 2 | | |
Debt instrument, prepayment fee | 1.00% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan M [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 2.00% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan M [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate margin | 1.00% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan M [Member] | Minimum [Member] | LIBOR [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate | 0.75% | | |
Subsequent Event [Member] | Bank Credit Facility [Member] | Term Loan M [Member] | Minimum [Member] | Prime Rate [Member] | | | |
Subsequent Event [Line Items] | | | |
Floating rate | 1.75% | | |