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

v2.4.0.8
Income Taxes - Schedule of Income Tax Reconciliation from Federal Income Tax Statutory Rate (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Reconciliation [Line Items]          
Computed Expected Tax Expense, Amount     $ 18,476 $ 24,842 $ (22,894)
Foreign Taxes, Amount     12,470 13,171 11,752
Tax Effect Different From Statutory Rates, Amount     (8,920) (8,080) (1,571)
State Taxes, net of Federal Benefit, Amount     4,099 4,757 2,689
Foreign Tax Credits, Amount     (1,484) (1,867) (14,595)
Change in Valuation Allowance, Amount     1,975 (1,662) 2,542
Uncertain Tax Positions, Amount     2,472 (6,642) 3,647
Permanent Differences, Amount     4,005 5,477 6,356
Prior Year Return to Provision Adjustments, Amount     (6,268) 4,057 4,156
Other, Amount     (1,217) (174) (829)
Unremitted Foreign Earnings-Current Year Adjustment, Amount     0 0 (5,484)
Actual Tax Expense, Amount (8,623) (1,504) 25,608 33,879 (14,767)
Computed Expected Tax Expense, Percentage     35.00% 35.00% 35.00%
Foreign Taxes, Percentage     24.00% 19.00% (17.00%)
Tax Effect Different From Statutory Rates, Percentage     (17.00%) (11.00%) 2.00%
State Taxes, net of Federal Benefit, Percentage     8.00% 7.00% (4.00%)
Foreign Tax Credits, Percentage     (3.00%) (3.00%) 22.00%
Change in Valuation Allowance, Percentage     4.00% (2.00%) (4.00%)
Uncertain Tax Positions, percentage     5.00% (9.00%) (6.00%)
Permanent Differences, Percentage     7.00% 8.00% (10.00%)
Prior Year Return to Provision Adjustments, Percentage     (12.00%) 5.00% (6.00%)
Other, Percentage     (2.00%) (1.00%) 1.00%
Unremitted Foreign Earnings-Current Year Adjustment, Percentage     0.00% 0.00% 8.00%
Actual Tax Expense, Percentage     49.00% 48.00% 22.00%
Kazakhstan [Member]
         
Income Tax Reconciliation [Line Items]          
Tax Settlement, Amount     $ 0 $ 0 $ (536)
Tax Settlement, Percentage     0.00% 0.00% 1.00%