Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES:
Consolidated net income	$ 151,788	$ 118,013
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	65,985	63,835
Amortization of debt financing costs	9,456	3,576
Impairment of intangible assets	9,368	2,627
Amortization of favorable contracts	0	53
Amortization of inventory step-up	0	4,682
Non-cash stock compensation expense	11,282	9,270
Non-cash interest expense	770	2,342
Deferred income taxes, net	(13,346)	(27,579)
Excess tax benefit from stock compensation	0	(47,997)
Non-cash gain on bargain purchase	0	(849)
Loss on extinguishment of debt	0	1,211
Loss on sale of available-for-sale securities	45	238
Other	(765)	0
Changes in operating assets and liabilities, net of acquisition:
Trade accounts receivable	(112,252)	52,056
Inventories, net	5,744	(41,177)
Prepaid expenses and other current assets	(6,349)	15,442
Trade accounts payable	5,698	9,357
Accrued expenses and other liabilities	(31,803)	86,999
NET CASH PROVIDED BY OPERATING ACTIVITIES	95,621	252,099
INVESTING ACTIVITIES:
Payments for acquisitions and equity investments, net of cash acquired	0	(26,908)
Proceeds from disposal of assets	5,966	2,459
Payments for other intangible assets	(3,875)	(3,135)
Purchases of property, plant and equipment	(48,884)	(21,628)
NET CASH USED IN INVESTING ACTIVITIES	(46,793)	(49,212)
FINANCING ACTIVITIES:
Net proceeds under stock option and stock purchase plans	8,891	11,917
Debt financing costs	(5,128)	(4,457)
Payment of contingent acquisition liabilities	0	(6,492)
Debt payments	(200,000)	(7,838)
Common stock repurchases	(25,000)	0
Excess tax benefit from stock compensation	0	47,997
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(221,237)	41,127
Effect of exchange rate changes on cash and cash equivalents	193	(228)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(172,216)	243,786
Cash and cash equivalents at beginning of period	346,266	70,679
CASH AND CASH EQUIVALENTS AT END OF PERIOD	174,050	314,465
SUPPLEMENTAL DISCLOSURES:
Amount paid for interest	33,022	38,614
Amount paid (refunded) for income taxes, net	103,103	(4,064)
Non-cash conversion of convertible notes to common shares	$ 43,214	$ 43,309