XML 67 R53.htm IDEA: XBRL DOCUMENT v3.3.1.900
Property and Equipment, Net - Summary of Depreciation Expense Related to Property and Equipment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Total depreciation expense $ 5,658 $ 5,353 $ 4,756
Operating Expenses [Member]      
Property, Plant and Equipment [Line Items]      
Total depreciation expense 5,237 4,940 4,425
Corporate General and Administrative Expenses [Member]      
Property, Plant and Equipment [Line Items]      
Total depreciation expense $ 421 $ 413 $ 331