Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Revenues	$ 2,069,193	$ 1,840,739	$ 1,882,187
Cost of sales	(1,364,764)	(1,274,142)	(1,340,666)
Gross profit	704,429	566,597	541,521
Selling, general and administrative expenses	(378,009)	(345,926)	(319,034)
Research and development	(83,277)	(65,410)	(54,752)
Amortization of intangibles	(50,803)	(22,792)	(13,149)
Income from equity method investment	8,922	9,704	13,169
Asset impairment and loss on sale of assets		(33,676)	(2,549)
Operating income	201,262	108,497	165,206
Interest expense	(73,095)	(52,038)	(48,118)
Interest income	494	1,033	1,011
Loss on debt extinguishment	(1,612)	(52,450)
Income from continuing operations before taxes	127,049	5,042	118,099
Income tax benefit (expense)	(22,315)	38,194	(16,791)
Income from continuing operations	104,734	43,236	101,308
Income (loss) from discontinued operations, net of tax	(1,421)	16,774	13,037
Gain from disposal of discontinued operations, net of tax		134,480
Net income	$ 103,313	$ 194,490	$ 114,345
Weighted average number of common shares and equivalents:
Basic	43,871	45,097	47,109
Diluted	44,737	45,942	48,104
Basic income (loss) per share:
Continuing operations	$ 2.39	$ 0.96	$ 2.15
Discontinued operations	$ (0.03)	$ 0.37	$ 0.28
Disposal of discontinued operations		$ 2.98
Net income	$ 2.36	$ 4.31	$ 2.43
Diluted income (loss) per share:
Continuing operations	$ 2.34	$ 0.94	$ 2.11
Discontinued operations	$ (0.03)	$ 0.36	$ 0.27
Disposal of discontinued operations		$ 2.93
Net income	$ 2.31	$ 4.23	$ 2.38