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Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Property Plant And Equipment [Line Items]    
Total cost $ 34,238 $ 22,958
Less: Accumulated depreciation (7,173) (5,704)
Property and equipment, net 27,065 17,254
Land [Member]    
Property Plant And Equipment [Line Items]    
Total cost 3,987 3,987
Building [Member]    
Property Plant And Equipment [Line Items]    
Total cost 17,806 9,848
Construction in progress [Member]    
Property Plant And Equipment [Line Items]    
Total cost 241 1,427
Computers [Member]    
Property Plant And Equipment [Line Items]    
Total cost 5,118 2,303
Furniture [Member]    
Property Plant And Equipment [Line Items]    
Total cost 1,284 1,286
Automobiles and Other Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Total cost 5,096 3,454
Software [Member]    
Property Plant And Equipment [Line Items]    
Total cost $ 706 $ 653