Summarized Condensed Consolidating and Combining Information - Condensed Consolidating Balance Sheets - Shares Information (Detail) - $ / shares	Jun. 30, 2015	Dec. 31, 2014
Summarized Condensed Consolidating And Combining Information [Abstract]
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares authorized	500,000,000	500,000,000
Common Stock, Shares Issued	31,306,782	31,251,157
Common Stock, Shares Outstanding	31,306,782	31,251,157