Stock-based Compensation - Additional Information (Detail)	1 Months Ended	6 Months Ended
	Apr. 30, 2014 Performance Unit Awards 2011	Jun. 30, 2014 Performance Unit Awards 2011	Apr. 17, 2014 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares of Common Stock authorized for grant under the 2014 Plan			9,100,000
Performance period		3 years
Award description		Generally, the recipients will receive a target number of shares if the Company's total shareholder return is positive and, when compared to the peer group, is at the 50thpercentile and two times the target if at the 75th percentile or higher.
Target number of shares		144,375
Shares issued	288,750