UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2015 - 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, 2014	$ 1,262,871	$ 589	$ (469)	$ 805,029	$ (110,842)	$ 568,564
Balance beginning of period (in shares) at Dec. 31, 2014		58,903
Increase (Decrease) in Stockholders' Equity
Net income (loss)	43,534					43,534
Other comprehensive loss	(118,713)				(118,713)
Stock-based compensation	6,550			6,550
Issuance of restricted shares, net of shares remitted	(2,027)	$ 1		(2,028)
Issuance of restricted shares, net of shares remitted (in shares)		94
Repurchases of common stock	$ (69,813)	$ (13)		(69,800)
Repurchases of common stock (in shares)	(1,300)	(1,344)
Exercise of stock options	$ 397	$ 0		397
Exercise of stock options (in shares)		12
Net tax deficiency on stock based awards	(78)			(78)
Balance at end of period at Sep. 30, 2015	$ 1,122,721	$ 577	$ (469)	$ 740,070	$ (229,555)	$ 612,098
Balance ending of period (in shares) at Sep. 30, 2015		57,665