Annual report pursuant to Section 13 and 15(d)

Property and Equipment (Textual) (Detail)

v3.6.0.2
Property and Equipment (Textual) (Detail) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment, Net [Abstract]        
Depreciation expense   $ 3.7 $ 4.2 $ 4.3
Asset held for sale, impairment $ 2.2