CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
OPERATING ACTIVITIES:
Net income	$ 36,915	$ 22,227
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	4,844	2,715
Amortization of intangible assets	8,264	4,805
Write-off of debt issuance costs	654	0
Compensation expense for restricted stock	1,491	928
Tax benefit related to vesting of restricted stock	(512)	(194)
Deferred income taxes	1,974	2,259
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	(16,539)	(21,466)
Inventories	(2,789)	(3,225)
Prepaid expenses and other assets	(1,788)	(1,314)
Accounts payable and accrued expenses	(11,251)	11,659
Net cash provided by operating activities	21,263	18,394
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(13,076)	(3,476)
Acquisitions of businesses, net of cash acquired	(137,847)	0
Net cash used in investing activities	(150,923)	(3,476)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	343,031	147,695
Principal payments on revolving line of credit and other long-term debt	(202,464)	(160,650)
Dividends paid	(68)	(68)
Purchase of treasury stock	(1,046)	(1,174)
Tax benefit related to vesting of restricted stock	512	194
Net cash provided by (used in) financing activities	139,965	(14,003)
EFFECT OF FOREIGN CURRENCY ON CASH	368	0
INCREASE IN CASH	10,673	915
CASH AT BEGINNING OF PERIOD	1,507	770
CASH AT END OF PERIOD	$ 12,180	$ 1,685