Consolidated Statement of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities:
Net income	$ 69,280	$ 80,070	$ 36,290
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisition impact:
Gain on dispositions of businesses and other assets	(2,250)	(11,770)	(280)
Gain on bargain purchase	0	(2,880)	0
Depreciation	32,770	30,810	25,050
Amortization of intangible assets	23,710	19,770	19,820
Amortization of debt issue costs	1,940	1,780	2,490
Deferred income taxes	(8,620)	(8,800)	(8,330)
Non-cash compensation expense	7,440	9,200	9,280
Excess tax benefits from stock based compensation	(1,180)	(1,550)	(2,730)
Debt financing and extinguishment expenses	3,360	2,460	46,810
Increase in receivables	(13,290)	(25,580)	(3,800)
Increase in inventories	(7,510)	(10,690)	(48,010)
(Increase) decrease in prepaid expenses and other assets	5,410	(2,380)	620
Increase (decrease) in accounts payable and accrued liabilities	14,050	7,800	(3,700)
Other, net	(1,710)	(630)	(290)
Net cash provided by operating activities, net of acquisition impact	123,400	87,610	73,220
Cash Flows from Investing Activities:
Capital expenditures	(34,450)	(39,490)	(46,120)
Acquisition of businesses, net of cash acquired	(382,880)	(105,790)	(89,880)
Net proceeds from disposition of businesses and other assets	7,240	14,940	3,000
Net cash used for investing activities	(410,090)	(130,340)	(133,000)
Cash Flows from Financing Activities:
Proceeds from sale of common stock in connection with the Company's equity offering, net of issuance costs	0	174,670	79,040
Proceeds from borrowings on term loan facilities	446,420	359,470	584,670
Repayments of borrowings on term loan facilities	(180,810)	(587,500)	(404,770)
Proceeds from borrowings on revolving credit and accounts receivable facilities	1,068,100	1,222,980	724,500
Repayments of borrowings on revolving credit and accounts receivable facilities	(993,090)	(1,113,910)	(706,500)
Repurchase of senior secured notes	0	0	(250,000)
Senior secured notes redemption premium and debt financing fees	(3,840)	(3,610)	(42,150)
Distributions to noncontrolling interests	(580)	(2,710)	(1,260)
Payments to Noncontrolling Interests	(51,000)	0	0
Proceeds from contingent consideration related to disposition of businesses	0	1,030	0
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(2,910)	(4,440)	(990)
Proceeds from exercise of stock options	640	1,620	6,170
Excess tax benefits from stock based compensation	1,180	1,550	2,730
Net cash provided by (used for) financing activities	284,110	49,150	(8,560)
Increase (decrease) for the year	(2,580)	6,420	(68,340)
At beginning of year	27,000	20,580	88,920
At end of year	24,420	27,000	20,580
Supplemental disclosure of cash flow information:
Cash paid for interest	10,870	16,750	31,300
Cash paid for income taxes	$ 41,110	$ 37,700	$ 25,820