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Long Term Debt - Credit Facilities - Additional Information (Detail) |  |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 18, 2015 USD ($) Covenant | Mar. 16, 2015 | Sep. 27, 2012 USD ($) Covenant | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Jul. 01, 2016 | Apr. 01, 2016 | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  |  |  | $ 200,000,000 |  |  |
Assets |  |  |  | $ 4,398,170,000 |  |  |  | $ 4,529,484,000
Letters of credit outstanding |  |  |  | 41,100,000 |  |  |  |
Maximum | Subsidiaries |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Assets | $ 1,000,000 |  |  |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit, amount outstanding |  |  |  | 0 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit, available borrowing capacity |  |  |  | $ 500,000,000 |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit agreement date |  |  | Sep. 27, 2012 |  |  |  |  |
Aggregate amount by which the revolving credit facility can be increased |  |  | $ 100,000,000 |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 700,000,000 |  |  |  |  |
Debt maturity date |  |  | Sep. 27, 2017 |  |  |  |  |
Commitment fee payable to the lenders for the unused portion of the credit facility |  |  | 0.50% |  |  |  |  |
Credit agreement, financial covenant description |  |  |  | The Company must not permit its debt to capitalization ratio to exceed 45%. The Credit Agreement generally defines the debt to capitalization ratio as the ratio of (a) total borrowed money indebtedness to (b) the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 3.00 to 1.00. The Credit Agreement generally defines the interest coverage ratio as the ratio of earnings before interest, taxes, depreciation and amortization (“EBITDA”) of the four prior fiscal quarters to interest charges for the same period. The Company was in compliance with these covenants at March 31, 2016 |  |  |  |
Credit agreement, financial covenant compliance |  |  |  | The Company was in compliance with these covenants |  |  |  |
Number of compliance covenants | Covenant |  |  | 2 |  |  |  |  |
Credit Agreement | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest coverage ratio that the Company must exceed on the last day of the fiscal quarter |  |  | 300.00% |  |  |  |  |
Credit Agreement | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt to capitalization ratio, percentage the Company must not exceed at any time |  |  | 45.00% |  |  |  |  |
Credit Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  | 2.25% |  |  |  |
Credit Agreement | London Interbank Offered Rate (LIBOR) | Scenario Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  |  | 2.75% |  |
Credit Agreement | London Interbank Offered Rate (LIBOR) | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  |  |  | 2.75% |
Credit Agreement | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.25% |  |  |  |  |
Credit Agreement | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 3.25% |  |  |  |  |
Credit Agreement | Base Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  | 1.25% |  |  |  |
Credit Agreement | Base Rate | Scenario Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  |  | 1.75% |  |
Credit Agreement | Base Rate | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  |  |  | 1.75% |
Credit Agreement | Base Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 1.25% |  |  |  |  |
Credit Agreement | Base Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.25% |  |  |  |  |
Credit Agreement | Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Current aggregate borrowing capacity |  |  | $ 500,000,000 |  |  |  |  |
Line of credit, amount outstanding |  |  |  | $ 0 |  |  |  |
Credit Agreement | Revolving Credit Facility | Letter of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Current aggregate borrowing capacity |  |  | 150,000,000 |  |  |  |  |
Credit Agreement | Revolving Credit Facility | Swing Line Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Current aggregate borrowing capacity |  |  | 40,000,000 |  |  |  |  |
Credit Agreement | Term Loan Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  | $ 100,000,000 |  |  |  |  |
Line of credit facility, frequency of payment and payment terms |  |  |  | The term loan facility is payable in quarterly principal installments, which commenced December 27, 2012. The installment amounts vary from 1.25% of the original principal amount for each of the first four quarterly installments, 2.50% of the original principal amount for each of the subsequent eight quarterly installments, 5.00% of the original principal amount for the subsequent four quarterly installments and 13.75% of the original principal amount for the final four quarterly installments. |  |  |  |
Line of credit facility, frequency of payments |  |  |  | Quarterly |  |  |  |
Commencement date of principal payments |  |  | Dec. 27, 2012 |  |  |  |  |
Line of credit, amount outstanding |  |  |  | $ 65,000,000 |  |  |  |
Line of credit facility, interest rate |  |  |  | 2.75% |  |  |  |
Credit Agreement | Term Loan Facility | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount |  |  | 1.25% |  |  |  |  |
Credit Agreement | Term Loan Facility | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount |  |  | 2.50% |  |  |  |  |
Credit Agreement | Term Loan Facility | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount |  |  | 5.00% |  |  |  |  |
Credit Agreement | Term Loan Facility | Debt Instrument, Redemption, Period Four [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount |  |  | 13.75% |  |  |  |  |
Reimbursement Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  | $ 41,100,000 |  |  |  |
Reimbursement Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.25% |  |  |  |  |  |
2015 Term Loan Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, frequency of payment and payment terms |  |  |  | The Term Loan Borrowing is payable in quarterly principal installments, together with accrued interest, on each June 30, September 30, December 31 and March 31, commencing on June 30, 2015. Each of the first four principal installments is in an amount equal to 2.5% of the Term Loan Borrowing and each successive quarterly installment, until and including June 30, 2017, is in an amount equal to 5.0% of the Term Loan Borrowing, with the outstanding principal balance of the Term Loan Borrowing due on the maturity date under the 2015 Term Loan Agreement. The maturity date under the 2015 Term Loan Agreement is September 27, 2017. Loans under the 2015 Term Loan Agreement bear interest, at the Company’s election, at the per annum rate of LIBOR rate plus 3.25% or base rate plus 2.25%. |  |  |  |
Line of credit facility, frequency of payments |  |  |  | Quarterly |  |  |  |
Commencement date of principal payments | Jun. 30, 2015 |  |  |  |  |  |  |
Debt maturity date | Sep. 27, 2017 |  |  |  |  |  |  |
Credit agreement, financial covenant description |  |  |  | The Company must not permit its debt to capitalization ratio to exceed 45%. The 2015 Term Loan Agreement generally defines the debt to capitalization ratio as the ratio of (a) total borrowed money indebtedness to (b) the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 3.00 to 1.00. The 2015 Term Loan Agreement generally defines the interest coverage ratio as the ratio of EBITDA of the four prior fiscal quarters to interest charges for the same period. The Company was in compliance with these covenants at March 31, 2016. |  |  |  |
Credit agreement, financial covenant compliance |  |  |  | The Company was in compliance with these covenants |  |  |  |
Number of compliance covenants | Covenant | 2 |  |  |  |  |  |  |
Line of credit, amount outstanding | $ 200,000,000 |  |  | $ 180,000,000 |  |  |  |
Line of credit facility, interest rate |  |  |  | 3.75% |  |  |  |
Quarterly interest payment, first payment date |  |  |  | June 30 |  |  |  |
Quarterly interest payment, second payment date |  |  |  | September 30 |  |  |  |
Quarterly interest payment, third payment date |  |  |  | December 31 |  |  |  |
Quarterly interest payment, fourth payment date |  |  |  | March 31 |  |  |  |
2015 Term Loan Agreement | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest coverage ratio that the Company must exceed on the last day of the fiscal quarter | 300.00% |  |  |  |  |  |  |
2015 Term Loan Agreement | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt to capitalization ratio, percentage the Company must not exceed at any time | 45.00% |  |  |  |  |  |  |
Pro forma ratio of debt to EBITDA | 250.00% |  |  |  |  |  |  |
2015 Term Loan Agreement | Maximum | Subsidiaries |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Assets | $ 1,000,000 |  |  |  |  |  |  |
2015 Term Loan Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  | 3.25% |  |  |  |
2015 Term Loan Agreement | Base Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  |  | 2.25% |  |  |  |
2015 Term Loan Agreement | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount | 2.50% |  |  |  |  |  |  |
2015 Term Loan Agreement | Debt Instrument, Redemption, Period Five [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Installment amounts percentage of the original principal amount | 5.00% |  |  |  |  |  |  |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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