Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Earnings (Loss) before Income Taxes (Detail)

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Income Taxes - Summary of Earnings (Loss) before Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Expected income tax expense (benefit) $ 28,775 $ 3,666 $ (45,866)
State income tax, net of federal benefit 255 1,406 (7,320)
Rate differential on foreign income (11,897) (8,752) (11,808)
Change in unrecognized tax benefits 740 (149) 2,906
Non-deductible expenses (150) 194 168
Prior year R&D credit claims (493) 0 (6,253)
Other (1,187) 79 304
Change in valuation allowance 5,304 3,517 4,402
Total income taxes (benefit) $ 21,347 $ (39) $ (63,467)
Effective tax rate 26.00% (0.40%) 48.40%