Certain Relationships and Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended
	Sep. 30, 2013
Related Party Transaction [Line Items]
Percentage the of Company's equity owned by affiliates	69.60%
Secondary Public Offering
Related Party Transaction [Line Items]
Secondary offering of common stock	23,805,000
Common stock, per share	$ 21.175
Stock repurchased from underwriter	4,700,000
Senior Notes
Related Party Transaction [Line Items]
Senior Notes, stated interest rate	7.125%
Lawrence E. Dewey | Fixed 7.125% Senior Notes
Related Party Transaction [Line Items]
Senior notes held by executive officers	$ 100,000
David S. Graziosi | Fixed 7.125% Senior Notes
Related Party Transaction [Line Items]
Senior notes held by executive officers	450,000
Robert M. Price | Fixed 7.125% Senior Notes
Related Party Transaction [Line Items]
Senior notes held by executive officers	$ 150,000