Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Operations [Abstract]
Revenues	$ 1,090,630	$ 1,198,223	$ 1,192,680
Cost of sales	579,825	603,893	569,482
Restructuring charges		3,985
Gross profit	510,805	590,345	623,198
Selling, general and administrative expenses	559,095	565,712	549,154
Restructuring charges	8,728	20,532
Asset impairment charges	15,306	8,827	10,949
Income (loss) from operations	(72,324)	(4,726)	63,095
Foreign currency transaction loss, net	(3,332)	(4,885)	(4,678)
Interest income	967	1,664	2,432
Interest expense	(969)	(806)	(1,016)
Other income, net	914	204	126
Income (loss) before income taxes	(74,744)	(8,549)	59,959
Income tax benefit (expense)	(8,452)	3,623	(49,539)
Net income (loss)	(83,196)	(4,926)	10,420
Dividends on Series A convertibles preferred shares	(11,833)	(11,301)
Dividend equivalents on Series A convertible preferred shares related to redemption value accretion and beneficial conversion feature	(2,978)	(2,735)
Net income (loss) attributable to common stockholders	$ (98,007)	$ (18,962)	$ 10,420
Net income (loss) per common share:
Basic	$ (1.30)	$ (0.22)	$ 0.12
Diluted	$ (1.30)	$ (0.22)	$ 0.12