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Long Term Debt - Credit Facilities - Additional Information (Detail) |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 08, 2016 USD ($) | Mar. 16, 2015 | Dec. 31, 2017 USD ($) Covenant | Oct. 27, 2017 USD ($) | Apr. 20, 2017 USD ($) | Jan. 24, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt maturity date |  |  | Sep. 27, 2017 |  |  |  |  |
Total assets |  |  | $ 5,758,856,000 |  |  |  | $ 3,772,291,000 | $ 4,465,048,000
Letters of credit outstanding |  |  | 59,500,000 |  |  |  |  |
Maximum | Subsidiaries |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total assets |  |  | 1,000,000 |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit, amount outstanding |  |  | $ 0 |  |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit agreement date |  |  | Sep. 27, 2012 |  |  |  |  |
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 40%. 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 its 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 December 31, 2017. |  |  |  |  |
Credit agreement, financial covenant compliance |  |  | The Company was in compliance with these covenants |  |  |  |  |
Number of compliance covenants | Covenant |  |  | 2 |  |  |  |  |
Maximum percentage allowed to invest in foreign subsidiaries or joint ventures on book value basis | 20.00% |  |  |  |  |  |  |
Maximum cash balance allowed | $ 100,000,000 |  |  |  |  |  |  |
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% |  |  |  |  |
Debt service coverage ratio | 150.00% |  |  |  |  |  |  |
Credit Agreement | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt to capitalization ratio, percentage the Company must not exceed at any time |  |  | 40.00% |  |  |  |  |
Credit Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 3.50% |  |  |  |  |
Credit Agreement | Base Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.50% |  |  |  |  |
Credit Agreement | Until September 27, 2017 | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.75% |  |  |  |  |
Credit Agreement | Until September 27, 2017 | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 3.25% |  |  |  |  |
Credit Agreement | Until September 27, 2017 | Base Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 1.75% |  |  |  |  |
Credit Agreement | Until September 27, 2017 | Base Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.25% |  |  |  |  |
Credit Agreement | Beginning September 27, 2017 | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 3.25% |  |  |  |  |
Credit Agreement | Beginning September 27, 2017 | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 3.75% |  |  |  |  |
Credit Agreement | Beginning September 27, 2017 | Base Rate | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.25% |  |  |  |  |
Credit Agreement | Beginning September 27, 2017 | Base Rate | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  |  | 2.75% |  |  |  |  |
Credit Agreement | Revolving Credit Facility | Through September 2017 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  | $ 632,000,000 |  |  |
Credit Agreement | Revolving Credit Facility | Through March 2019 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | $ 500,000,000 | 490,000,000 |  |  |
Credit Agreement | Revolving Credit Facility | Letter of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity | $ 50,000,000 |  |  |  |  |  |  |
Credit Agreement | Revolving Credit Facility | Swing Line Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity | 20,000,000 |  |  |  |  |  |  |
Amended Credit Agreement Two |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit agreement amendment date |  |  | Jul. 08, 2016 |  |  |  |  |
Debt maturity date |  |  | Mar. 27, 2019 |  |  |  |  |
Aggregate commitments under the revolving credit facility | $ 357,900,000 |  |  |  |  |  |  |
Line of credit, amount outstanding |  |  | $ 268,000,000 |  |  |  |  |
Amended Credit Agreement Two | Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate commitments under the revolving credit facility |  |  |  |  |  | $ 595,800,000 |  |
Weighted average interest rate |  |  | 5.71% |  |  |  |  |
Letters of credit outstanding |  |  | $ 4,600,000 |  |  |  |  |
Line of credit, available borrowing capacity |  |  | $ 227,000,000 |  |  |  |  |
Amended Credit Agreement Four |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit agreement amendment date |  |  | Apr. 20, 2017 |  |  |  |  |
Amended Credit Agreement Four | Through March 2019 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit agreement amendment date |  |  | Oct. 27, 2017 |  |  |  |  |
Amended Credit Agreement Four | Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  |  | $ 700,000,000 |  |  |
Reimbursement Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  | $ 54,900,000 |  |  |  |  |
Reimbursement Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.25% |  |  |  |  |  |

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