Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	1.90%	0.00%
Unrecognized Tax Benefits	$ 0		$ 0
Undistributed earnings	$ 10,500,000		$ 8,800,000