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Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property Plant And Equipment [Line Items]    
Total $ 36,638 $ 33,997
Less: Accumulated depreciation (8,527) (7,173)
Property and equipment, net 32,162 27,065
Land [Member]    
Property Plant And Equipment [Line Items]    
Total 4,489 3,987
Building [Member]    
Property Plant And Equipment [Line Items]    
Total 17,633 17,806
Computers [Member]    
Property Plant And Equipment [Line Items]    
Total 5,577 5,118
Furniture [Member]    
Property Plant And Equipment [Line Items]    
Total 1,381 1,284
Automobiles and Other Vehicles [Member]    
Property Plant And Equipment [Line Items]    
Total 5,523 5,096
Software [Member]    
Property Plant And Equipment [Line Items]    
Total 2,035 706
Net of Accumulated Depreciation [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, net 28,111 26,824
Construction in progress [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, net $ 4,051 $ 241