UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Shares Held Under Employee Participation Plan	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings
Balance at beginning of period at Dec. 31, 2015	$ 1,096,282	$ 576	$ (469)	$ 738,401	$ (254,892)	$ 612,666
Balance beginning of period (in shares) at Dec. 31, 2015		57,593
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(27,160)					(27,160)
Other comprehensive income	43,348				43,348
Stock-based compensation	7,735			7,735
Issuance of restricted shares, net of shares remitted	(2,500)	$ 1		(2,501)
Issuance of restricted shares, net of shares remitted (in shares)		124
Repurchases of common stock	$ (16,348)	$ (3)		(16,345)
Repurchases of common stock (in shares)	(300)	(337)
Exercise of stock options	$ 230			230
Exercise of stock options (in shares)		10
Net tax deficiency on stock based awards	(642)			(642)
Balance at end of period at Sep. 30, 2016	$ 1,100,945	$ 574	$ (469)	$ 726,878	$ (211,544)	$ 585,506
Balance ending of period (in shares) at Sep. 30, 2016		57,390