Partners' Capital, Equity and Incentive Compensation Plans - Additional Information (Detail) (USD $)	0 Months Ended			6 Months Ended	3 Months Ended			6 Months Ended
	May 06, 2014	Apr. 08, 2014	Jan. 07, 2014	Jun. 30, 2014 Class	Jun. 30, 2014 Class O LTIP Holders [Member]	Jun. 30, 2014 Class O Units [Member]	Jun. 30, 2014 Class RS Units [Member]	Jun. 30, 2014 Chief Executive Officer [Member] Vote	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Restricted Class A Common Stock [Member]	Jun. 30, 2014 Options to purchase Class A common stock [Member]	Jun. 30, 2014 2013 Equity Incentive Plan [Member]
Partners Capital And Distributions [Line Items]
Number of classes of partnership units outstanding				3
Authorized shares to be issued under the plan												1,750,000
Number of votes per share								50
Percentage of operating partnership unit exchanged								2.00%
Nonvested awards outstanding						900,000	100,000			200,000	600,000
Equity based compensation expense unrecognized				$ 8,800,000
Equity based compensation expense vesting period									4 years
Equity based compensation awards intrinsic value				17,300,000
Aggregate distribution made to stockholders and partners		$ 10,700,000	$ 9,000,000		$ 200,000
Dividend paid to common stockholders		$ 0.29	$ 0.24
Partnership distribution per unit		$ 0.29	$ 0.24
Dividends Payable, Date Declared	Jul. 08, 2014
Cash dividend per common share	$ 0.29
Dividends Payable, Date of Record	Jun. 20, 2014