CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net income	$ 26,981	$ 23,823
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	4,705	2,019
Amortization of intangible assets	5,787	4,790
Compensation expense for restricted stock	1,440	954
Tax benefit related to vesting of restricted stock	(540)	(248)
Deferred income taxes	(3,455)	(298)
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	2,705	(10,954)
Inventories	(449)	(3,387)
Prepaid expenses and other assets	2,158	(468)
Accounts payable and accrued expenses	(311)	8,577
Net cash provided by operating activities	39,021	24,808
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(4,505)	(9,981)
Purchase of long-term investment	(68)	0
Acquisitions of businesses, net of cash acquired	(41,584)	(73,485)
Net cash used in investing activities	(46,157)	(83,466)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	241,498	101,178
Principal payments on revolving line of credit and other long-term debt	(232,560)	(37,252)
Dividends paid	(45)	(45)
Purchase of treasury stock	(304)	(387)
Tax benefit related to vesting of restricted stock	540	248
Net cash provided by financing activities	9,129	63,742
EFFECT OF FOREIGN CURRENCY ON CASH	(354)	0
INCREASE IN CASH AND CASH EQUIVALENTS	1,639	5,084
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	10,455	1,507
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 12,094	$ 6,591