Earnings (Loss) Per Share - Additional Information (Detail)	Jun. 30, 2015 $ / shares	Jun. 29, 2015 USD ($) $ / shares	May. 06, 2015 USD ($)	Dec. 31, 2014 $ / shares
Class of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.01			$ 0.01
Stock Repurchase Program, Authorized Amount | $			$ 50,000,000
Junior Participating Preferred Stock [Member]
Class of Stock [Line Items]
Dividends, Preferred Stock, Stock		1
Preferred Stock, Par or Stated Value Per Share		$ 0.01
PreferredStockDividendTriggerEvent		20.00%
Preferred Stock, Redemption Price Per Share | $		$ 74.16