CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES:
Net income	$ 13,232	$ 11,646
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	2,248	914
Amortization of intangible assets	2,642	2,234
Compensation expense for restricted stock	724	431
Tax benefit related to vesting of restricted stock	(373)	(163)
Deferred income taxes	(2,820)	(105)
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	(14,424)	(9,482)
Inventories	1,703	(897)
Prepaid expenses and other assets	1,948	(567)
Accounts payable and accrued expenses	12,052	22,630
Net cash provided by operating activities	16,932	26,641
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,360)	(852)
Acquisitions of businesses, net of cash acquired	0	(42,413)
Net cash used in investing activities	(2,360)	(43,265)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	94,727	60,323
Principal payments on revolving line of credit and other long-term debt	(112,833)	(41,824)
Dividends paid	(23)	(23)
Tax benefit related to vesting of restricted stock	373	163
Net cash provided by (used in) financing activities	(17,756)	18,639
EFFECT OF FOREIGN CURRENCY ON CASH	(36)	0
(DECREASE) INCREASE IN CASH AND CASH	(3,220)	2,015
CASH AT BEGINNING OF PERIOD	10,455	1,507
CASH AT END OF PERIOD	$ 7,235	$ 3,522