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Pension Plans - Additional Information (Detail) - USD ($) |  | 12 Months Ended
--- | --- | ---
Mar. 11, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Pension And Other Employee Benefit Plans [Line Items] |  |  |  |
Prior service cost |  | $ 0 |  |
Pretax unfunded pension obligation gain |  | 700,000 |  |
Decreased cost resulting from a .25% increase in the discount rate |  | $ 1,500,000 |  |
Expected long-term return on plan assets |  | 8.00% | 8.00% | 8.00%
Contribution to pension plan |  | $ 0 |  |
Expense for contribution plan |  | $ 5,500,000 | $ 6,100,000 | $ 5,600,000
Weighted average of one year treasury bill |  | 1.00% |  |
Interest rate for the supplemental profit sharing plan |  | 1.22% | 1.12% |
Expense for the supplemental profit sharing plan |  | $ 300,000 | $ 500,000 | $ 300,000
Supplemental profit sharing plan unfunded status |  | 3,900,000 | $ 3,500,000 |
Subsequent Event [Member] |  |  |  |
Pension And Other Employee Benefit Plans [Line Items] |  |  |  |
Estimated net loss for the PLP-USA pension plan | $ 500,000 |  |  |
Additional Loss on Industry Updates to Mortality Table [Member] |  |  |  |
Pension And Other Employee Benefit Plans [Line Items] |  |  |  |
Pretax unfunded pension obligation gain |  | $ 700,000 |  |

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- Definition Pension And Other Employee Benefit Plans [Line Items] + References No definition available. + Details
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- Definition Retirement and profit sharing plan expenses. + References No definition available. + Details
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- Definition Supplemental profit sharing plan interest rate. + References No definition available. + Details
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- Definition Supplemental profit sharing plan variable rate basis. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation). + References No definition available. + Details
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- Definition Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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