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Reconciliation for Significant Differences in Tax at Statutory and Effective Rates (Detail)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Statutory Federal Tax Rate [Line Items]      
Federal income tax expense 35.00% 35.00% 35.00%
State income tax expense, net of federal tax effect 1.00%   6.20%
Effect of differences in U.S. and Foreign statutory rates (9.40%) (14.10%) 4.80%
Uncertain tax positions 0.30%   0.40%
Earn out adjustments (7.40%)    
Provision to return 12.20%    
Other 1.60% (0.40%) 4.30%
Foreign deemed dividend 1.70%   (45.30%)
Foreign tax credit (0.50%)   21.40%
Valuation allowance (21.60%) (5.80%) (31.90%)
Effective income tax rate 12.90% 14.70% (5.10%)