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Income Tax - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]    
Gross deferred tax asset $ 5.7 $ 5.0
Gross deferred tax liability 19.4 $ 19.2
Decrease in liability for uncertain tax position relating to net operating loss created by transaction costs $ 4.5  
Percentage of net operating loss deduction with regular tax 80.00%  
Percentage of net operating loss deduction with alternative minimum tax 70.00%  
NOL carryforwards available to offset future taxable income $ 13.2