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Market Concentrations and Risks - Additional Information (Detail) $ in Thousands, lb in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) lb Customer Distributor | Dec. 31, 2014 USD ($) | Dec. 31, 2013
Concentration Risk [Line Items] |  |  |
Number of customers | Customer | 10 |  |
Number of Distributers | Distributor | 5 |  |
Carrying amount of debt instruments | $ 1,727,782 | $ 1,739,454 |
Fair value of debt instrument | 1,416,600 | 1,529,400 |
Face value of senior subordinated notes | $ 1,459,100 | $ 1,521,500 |
Copper [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Committed amounts to purchase | lb | 2.4 |  |
Aggregate cost | $ 5,600 |  |
Recorded unconditional purchase obligation fixed cost | $ 400 |  |
Aluminum [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Committed amounts to purchase | lb | 0.5 |  |
Aggregate cost | $ 400 |  |
Consolidated Revenues [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 33.00% | 33.00% | 36.00%
Workforce Subject to Collective Bargaining Arrangements [Member] | Labor Force Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 22.00% |  |
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year [Member] | Labor Force Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 19.00% |  |

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