Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Earnings (Loss) before Income Taxes and Income Tax Expense (Benefit) (Detail)

v2.4.0.8
Income Taxes - Schedule of Earnings (Loss) before Income Taxes and Income Tax Expense (Benefit) (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes $ 82,215 $ 10,473 $ (131,047)
Income tax expense (benefit) 21,347 (39) (63,467)
Effective tax rate 26.00% (0.40%) 48.40%
United States [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 38,705 (27,379) (161,976)
Income tax expense (benefit) 12,807 (5,867) (66,355)
Canada [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 4,091 2,564 945
Income tax expense (benefit) 1,187 545 309
Chile [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 9,622 5,971 9,321
Income tax expense (benefit) 1,920 1,043 2,030
China [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 6,148 1,278 1,416
Income tax expense (benefit) 1,646 319 354
Jersey [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 25,348 25,162 25,109
Income tax expense (benefit) 0 0 0
Non-benefited loss operations [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes (15,841) (13,492) (16,844)
Income tax expense (benefit) 0 0 0
Other jurisdictions [Member]
      
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]      
Earnings (loss) before income taxes 14,142 16,369 10,982
Income tax expense (benefit) $ 3,787 $ 3,921 $ 195