Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Common Stock Held In Employee Benefit & Compensation Trust [Member]
Balance at Dec. 31, 2011	$ 1,339,944	$ 1,499	$ 1,798,161	$ (261,937)	$ (50,757)	$ (146,041)	$ (981)
Balance, shares at Dec. 31, 2011		149,861,081
Comprehensive income (loss):
Net income (loss)	117,641	0	0	0	117,641	0	0
Other comprehensive income:
Unrealized losses on securities, net of tax	(8,823)	0	(11)	(8,812)	0	0	0
Foreign currency translation adjustments	(9,929)	0	0	(9,929)	0	0	0
Total comprehensive income	(18,752)		(11)	(18,741)
Treasury stock	(101,697)					(101,697)
Stock-based compensation	7,964	6	9,720			(1,762)
Stock-based compensation, shares		553,614
Shares issued in lieu of cash for incentive compensation	0	0	0	0	0	0	0
Shares issued in lieu of cash for incentive compensation, shares		0
Common stock issued to savings and pension plan trusts	4,594	4	4,565	0	0	13	12
Common stock issued to savings and pension plan trusts, shares		433,061
Sale of common stock under stock options	157	0	157	0	0	0	0
Number of Shares, Exercised		21,471
Balance at Dec. 31, 2012	1,349,851	1,509	1,812,592	(280,678)	66,884	(249,487)	(969)
Balance, shares at Dec. 31, 2012		150,869,227
Comprehensive income (loss):
Net income (loss)	(27,259)	0	0	0	(27,259)	0	0
Other comprehensive income:
Unrealized losses on securities, net of tax	2,035	0	0	2,035	0	0	0
Foreign currency translation adjustments	(13,981)	0	0	(13,981)	0	0	0
Total comprehensive income	(11,946)			(11,946)
Treasury stock	0	0	0	0	0	0	0
Treasury stock, shares	10,000,000
Stock-based compensation	5,151	4	2,850			2,297
Stock-based compensation, shares		405,168
Shares issued in lieu of cash for incentive compensation	4,504	6	4,561			0	(63)
Shares issued in lieu of cash for incentive compensation, shares		564,435
Common stock issued to savings and pension plan trusts	448	0	448	0	0	0	0
Common stock issued to savings and pension plan trusts, shares		90,735
Balance at Dec. 31, 2013	1,320,749	1,519	1,820,451	(292,624)	39,625	(247,190)	(1,032)
Balance, shares at Dec. 31, 2013		151,929,565
Comprehensive income (loss):
Net income (loss)	(285,376)	0	0	0	(285,376)	0	0
Other comprehensive income:
Unrealized losses on securities, net of tax	(10,859)	0	0	(10,859)	0	0	0
Foreign currency translation adjustments	(33,041)	0	0	(33,041)	0	0	0
Total comprehensive income	(43,900)			(43,900)
Treasury stock	0	0	0	0	0	0	0
Stock-based compensation	5,614	0	(1,765)			7,379
Stock-based compensation, shares		322
Shares issued in lieu of cash for incentive compensation				0	0		0
Common stock issued to savings and pension plan trusts	4,623	6	4,381	0	0	0	236
Common stock issued to savings and pension plan trusts, shares		574,973
Sale of common stock under stock options	2,816	3	2,813	0	0	0	0
Number of Shares, Exercised		316,151
Balance at Dec. 31, 2014	$ 1,004,526	$ 1,528	$ 1,825,880	$ (336,524)	$ (245,751)	$ (239,811)	$ (796)
Balance, shares at Dec. 31, 2014		152,821,011