Subsequent Events - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2014	Apr. 07, 2014 Subsequent Event [Member] Class A Common Stock [Member]
Subsequent Event [Line Items]
Common stock issued, shares	9,775,000	9,200,000
Common stock offering price per share		$ 27.72
Proceeds from shares issued, net of underwriting discounts and other offering expenses	$ 256,093	$ 254,600