Capital Stock - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Employees of former affliate [Member] | Employee Stock Option [Member]
Equity [Line Items]
Options to purchase shares of common stock	713,000
Exercisable at end of period, Weighted Average Remaining Contractual Term	2 years
Weighted average exercise price	$ 26.02
Aggregate intrinsic value	$ 75
Preferred Stock [Member]
Equity [Line Items]
Stockholders to purchase, conditions	One one-hundredth of a share of newly issued Series A Junior Participating Preferred Stock
Preferred stock purchase right	One-quarter of a preferred stock purchase right
Preferred stock exercise price	$ 100
Minimum percentage of beneficial ownership to acquire exercisable rights	20.00%
Redemption price of rights	$ 0.001
Redemption time of rights	10 days
Expiry date of rights	Dec. 11, 2017