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Property, Equipment and Software - Summary of Property, Equipment and Software (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment $ 32,719 $ 28,674
Less accumulated depreciation and amortization 13,660 11,675
Property, Plant and Equipment, Gross 19,059 16,999
Land 1,490 1,490
Property, Plant and Equipment, Net 20,549 18,489
Buildings [Member]
   
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 11,158 10,897
Office Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 8,912 6,095
Computer Hardware and Software [Member]
   
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 8,032 7,098
Aircraft [Member]
   
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment $ 4,617 $ 4,584