CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOW FROM OPERATING ACTIVITIES:
Net income	$ 43,333	$ 36,915
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	6,934	4,844
Amortization of intangible assets	9,221	8,264
Write-off of debt issuance costs	0	654
Compensation expense for restricted stock	2,150	1,491
Tax benefit related to vesting of restricted stock	(572)	(512)
Deferred income taxes	(3,966)	1,974
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	(3,896)	(16,539)
Inventories	(250)	(2,789)
Prepaid expenses and other assets	1,689	(1,788)
Accounts payable and accrued expenses	13,028	(11,251)
Net cash provided by operating activities	67,671	21,263
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(6,389)	(13,076)
Purchase of long-term investment	(68)	0
Acquisitions of businesses, net of cash acquired	(61,421)	(137,847)
Net cash used in investing activities	(67,878)	(150,923)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	362,224	343,031
Principal payments on revolving line of credit and other long-term debt	(364,251)	(202,464)
Dividends paid	(68)	(68)
Purchase of treasury stock	(304)	(1,046)
Tax benefit related to vesting of restricted stock	572	512
Net cash (used in) provided by financing activities	(1,827)	139,965
EFFECT OF FOREIGN CURRENCY ON CASH	(150)	368
NET CHANGE IN CASH AND CASH EQUIVALENTS	(2,184)	10,673
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	10,455	1,507
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 8,271	$ 12,180