Amount of issue discount included in other assets.

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Debt operating cash flows ratio required to be maintained.

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Interest coverage ratio required to maintain under credit facility.

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Leverage ratio required to maintain under credit facility.

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Notes expiration date.

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Original principal amount as final payment.

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Percentage Of Principal Amount As Final Payment

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Percentage Of Quarterly Reduction In Principal Amount

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Face (par) amount of debt instrument at time of issuance.

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Amount of the required periodic payments including both interest and principal payments.

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Weighted average interest rate of debt outstanding.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Date the credit facility terminates, in CCYY-MM-DD format.

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The effective interest rate at the end of the reporting period.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The cash outflow for loan and debt issuance costs.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Debt - Additional Information (Detail) - USD ($)									12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Dec. 17, 2015	Nov. 23, 2015	Aug. 12, 2015	Oct. 10, 2014	Jun. 20, 2014	Mar. 17, 2014	May. 29, 2013	Aug. 28, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Financing costs									$ 2,299,000	$ 12,480,000	$ 5,284,000
Outstanding senior notes									500,000,000
Proceeds from issuance of senior notes										200,000,000
Loss on early extinguishment of debt (Note 6)									4,382,000	300,000	$ 832,000
OID, as recorded in other assets, net									4,900,000	$ 8,700,000
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Original principal amount						$ 200,000,000
Outstanding senior notes									$ 200,000,000
Senior notes expiration date									2021-04
Proceeds from issuance of senior notes						$ 196,200,000
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Original principal amount								$ 300,000,000
Outstanding senior notes									$ 300,000,000
Senior notes expiration date									2023-04
Proceeds from issuance of senior notes								$ 294,500,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Expiration date of revolving credit commitments									Dec. 31, 2018
Interest rate on borrowings									1.50%
Weighted average interest rate on outstanding borrowings									3.70%
Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 600,000,000
Loans Payable [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 51,500,000
Maximum [Member]
Debt Instrument [Line Items]
Required debt to operating cash flow									850.00%
Minimum [Member]
Debt Instrument [Line Items]
Required debt to operating cash flow									100.00%
Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 1,647,000,000
Unused revolving credit commitments									$ 306,600,000
Bank Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio									500.00%
Interest coverage ratio									200.00%
Bank Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio									100.00%
Interest coverage ratio									100.00%
Revolving Credit Commitments at Present [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Rate of commitment fees on the unused portion of revolving credit commitments				0.50%
Revolving Credit Commitments at Present [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin				2.75%
Revolving Credit Commitments at Present [Member] \| Maximum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin				1.75%
Revolving Credit Commitments at Present [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Rate of commitment fees on the unused portion of revolving credit commitments				0.38%
Revolving Credit Commitments at Present [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin				2.00%
Revolving Credit Commitments at Present [Member] \| Minimum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin				1.00%
Revolving Credit Commitments at Present [Member] \| Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitments				$ 216,000,000					$ 368,500,000
Expiration date of revolving credit commitments									Oct. 10, 2019
Additional revolving credit commitments		$ 87,500,000	$ 25,000,000	$ 40,000,000
Term Loan A [Member]
Debt Instrument [Line Items]
Original principal amount	$ 151,500,000
Financing costs	1,700,000
Net proceeds from term loan	149,800,000
Quarterly principal payments of original principal amount	$ 1,900,000
Rate of quarterly principal payments of original principal amount	1.25%
Final payment at maturity representing the original principal amount	$ 113,600,000
Rate of Final payment at maturity representing the original principal amount	75.00%
Term Loan A [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin	3.50%
Term Loan A [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin	2.50%
Term Loan A [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin	2.25%
Term Loan A [Member] \| Minimum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin	1.25%
Term Loan A [Member] \| Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 151,500,000
Expiration date of revolving credit commitments									Jan. 15, 2021
Term Loan H [Member]
Debt Instrument [Line Items]
Original principal amount							$ 600,000,000
Quarterly principal payments of original principal amount							$ 1,500,000
Rate of quarterly principal payments of original principal amount							0.25%
Final payment at maturity representing the original principal amount							$ 555,000,000
Rate of Final payment at maturity representing the original principal amount							92.50%
Term Loan H [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin							2.50%
Term Loan H [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin							1.50%
Term Loan H [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin							0.75%
Term Loan H [Member] \| Minimum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin							1.75%
Term Loan H [Member] \| Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 585,000,000
Expiration date of revolving credit commitments									Jan. 29, 2021
Term Loan I [Member]
Debt Instrument [Line Items]
Original principal amount					$ 250,000,000
Quarterly principal payments of original principal amount					$ 600,000
Rate of quarterly principal payments of original principal amount					0.25%
Final payment at maturity representing the original principal amount					$ 243,100,000
Rate of Final payment at maturity representing the original principal amount					97.25%
Term Loan I [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin					2.50%
Term Loan I [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin					1.50%
Term Loan I [Member] \| Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 246,300,000
Expiration date of revolving credit commitments									Jun. 30, 2017
Term Loan J [Member]
Debt Instrument [Line Items]
Original principal amount					$ 300,000,000
Quarterly principal payments of original principal amount					$ 800,000
Rate of quarterly principal payments of original principal amount					0.25%
Final payment at maturity representing the original principal amount					$ 279,800,000
Rate of Final payment at maturity representing the original principal amount					93.25%
Term Loan J [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin					2.75%
Term Loan J [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin					1.75%
Term Loan J [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin					3.00%
Term Loan J [Member] \| Maximum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin					2.00%
Term Loan J [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floating rate margin					0.75%
Term Loan J [Member] \| Minimum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Floating rate margin					1.75%
Term Loan J [Member] \| Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 295,500,000
Expiration date of revolving credit commitments									Jun. 30, 2021
Letter of Credit [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding									$ 10,400,000
Term Loan G [Member]
Debt Instrument [Line Items]
Original principal amount	$ 194,000,000