Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Income Tax Reconciliation from Federal Income Tax Statutory Rate (Detail)

v2.4.0.6
Income Taxes - Schedule of Income Tax Reconciliation from Federal Income Tax Statutory Rate (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Reconciliation [Line Items]      
Computed Expected Tax Expense, Percentage 35.00% 35.00% 35.00%
Foreign Taxes, Percentage 19.00% (24.00%) 165.00%
Tax Effect Different From Statutory Rates, Percentage (11.00%) 2.00% (70.00%)
State Taxes, net of federal benefit, Percentage 7.00% (4.00%) 14.00%
Foreign Tax Credits, Percentage (3.00%) 22.00% (134.00%)
Change in Valuation Allowance, Percentage (2.00%) (4.00%) 4.00%
Uncertain Tax Positions, percentage (10.00%) (2.00%) 9.00%
Permanent Differences, Percentage 8.00% (10.00%) 52.00%
Prior Year Return to Provision Adjustments, Percentage 4.00% (1.00%) 15.00%
Other, Percentage 1.00% (1.00%) 13.00%
Unremitted Foreign Earnings-Current Year Adjustment, Percentage 0.00% 8.00% 0.00%
Actual Tax Expense, Percentage 48.00% 22.00% 228.00%
Computed Expected Tax Expense, Amount $ 24,842 $ (22,894) $ 4,027
Foreign Taxes, Amount 13,428 15,644 18,951
Tax Effect Different From Statutory Rates, Amount (8,080) (1,571) (7,996)
State Taxes, net of federal benefit, Amount 4,757 2,689 1,579
Foreign Tax Credits, Amount (1,867) (14,595) (15,442)
Tax settlement, Amount     1,200
Change in Valuation Allowance, Amount (1,662) 2,542 506
Uncertain Tax Positions, Amount (6,814) 1,348 983
Permanent Differences, Amount 5,477 6,356 6,003
Prior Year Return to Provision Adjustments, Amount 2,948 835 1,775
Other, Amount 850 899 1,501
Unremitted Foreign Earnings-Current Year Adjustment, Amount   (5,484)  
Actual Tax Expense, Amount 33,879 (14,767) 26,213
Kazakhstan [Member]
     
Income Tax Reconciliation [Line Items]      
Tax settlement, percentage 0.00% 1.00% 116.00%
Tax settlement, Amount   (536) 13,304
Mexico [Member]
     
Income Tax Reconciliation [Line Items]      
Tax settlement, percentage 0.00% 0.00% 9.00%
Tax settlement, Amount     $ 1,022