Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING ACTIVITIES:
Consolidated net income	$ 184,243	$ 150,798	$ 13,884
Loss from discontinued operations, net of tax	0	0	504
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	87,963	86,924	57,831
Impairment of intangible assets	44,369	33,003	0
Amortization of deferred financing fees	10,760	4,350	9,984
Amortization of favorable (unfavorable) contracts	0	71	71
Amortization of inventory step-up	0	4,681	20,798
Non-cash stock compensation expense	15,412	12,997	7,752
Non-cash interest expense	777	2,778	4,871
Non-cash gain on bargain purchase	0	(849)	0
Gain from product divestiture	0	0	(9,329)
Deferred income taxes, net	(32,934)	(46,130)	(17,511)
Excess tax benefit from stock compensation	0	(47,997)	(29,517)
Loss on extinguishment of debt	0	1,243	990
Gain (loss) on sale of available-for-sale security	45	237	(7)
Other	(4,888)	0	0
Changes in operating assets and liabilities:
Trade accounts receivable, net	(132,617)	40,287	(72,796)
Inventories, net	10,208	(50,729)	(19,385)
Prepaid expenses and other current assets	(6,494)	17,574	30,372
Trade accounts payable	6,139	(4,819)	13,963
Accrued expenses and other liabilities	(15,224)	93,229	27,967
NET CASH PROVIDED BY OPERATING ACTIVITIES	167,759	297,648	40,442
INVESTING ACTIVITIES:
Payments for acquisitions and equity investments, net of cash acquired	0	(24,408)	(987,428)
Proceeds from disposal of assets	5,966	2,459	59,361
Payments for other intangible assets	(3,950)	(3,835)	(8,908)
Purchases of property, plant and equipment	(74,938)	(27,934)	(29,899)
NET CASH USED IN INVESTING ACTIVITIES	(72,922)	(53,718)	(966,874)
FINANCING ACTIVITIES:
Proceeds from issuances of debt	0	0	1,045,000
Proceeds under stock option and stock purchase plans	9,795	11,916	8,842
Payments of contingent acquisition liabilities	0	(8,991)	(15,000)
Debt financing costs	(5,128)	(8,564)	(28,365)
Proceeds from warrant exercises	0	0	8,171
Excess tax benefits from stock compensation	0	47,997	29,517
Common stock repurchases	(45,000)	0	0
Debt repayment	(200,000)	(10,450)	(85,049)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(240,333)	31,908	963,116
Effect of changes in exchange rates on cash and cash equivalents	2	(251)	(183)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(145,494)	275,587	36,501
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	346,266	70,679	34,178
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 200,772	$ 346,266	$ 70,679