Property and Equipment, net - Summary of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Total, at cost	$ 16,312	$ 15,853
Less: accumulated depreciation and amortization	(4,020)	(2,721)
Property and equipment, net	12,292	13,132
Land [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	1,642	1,642
Building [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	7,622	7,596
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	1,617	1,486
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	1,647	1,407
Tenant and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	3,093	3,093
Other [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	$ 691	$ 629