Stockholder Rights Plan - Additional Information (Details)		9 Months Ended
	Jan. 29, 2016 right $ / shares $ / right	Sep. 30, 2017 $ / shares	Dec. 31, 2016 $ / shares
Class Of Stock [Line Items]
Number of rights for each outstanding share | right	1
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Right to purchase a share of preferred stock		Each right entitled the registered holder to purchase from the Company one one-thousandth of a share of preferred stock, par value $.01 per share.
Preferred stock, par value	$ 0.01
Rights expiration date	Jan. 29, 2026
Minimum percentage of common stock for tender offer	9.80%
Exercise price of rights	$ 12
Percentage of market price of common stock	50.00%
Redemption price per right | $ / right	0.01
Series A Preferred Stock
Class Of Stock [Line Items]
Right to purchase a share of preferred stock		Each holder of a right, except the acquirer, would have been entitled, subject to the Company’s right to redeem or exchange the right, to exercise, at an exercise price of $12, the right to purchase one one-thousandth of a share of the Company’s newly created Series A Participating Preferred Stock
Preferred stock, par value		$ 0.01	$ 0.01