CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 60,237	$ 50,985	$ 31,437
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	9,830	7,196	3,510
Amortization of Intangible Assets	11,830	10,886	6,572
Write-off of debt issuance costs	0	654	0
Gain on reversal of earn-out	(2,805)	0	0
Compensation expense for restricted stock	2,832	1,955	1,256
Tax benefit related to vesting of restricted stock	(958)	(680)	(198)
Deferred income taxes	2,834	1,230	2,426
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	(1,297)	(1,978)	(21,548)
Inventories	3,860	(3,470)	(4,258)
Prepaid expenses and other assets	2,215	(2,211)	(2,617)
Accounts payable and accrued expenses	(6,380)	(13,361)	9,248
Net cash provided by operating activities	82,198	51,206	25,828
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(7,745)	(14,110)	(4,096)
Purchase of long-term investment	(68)	(105)	(1,572)
Acquisitions of businesses, net of cash acquired	(61,195)	(144,879)	(18,434)
Net cash used in investing activities	(69,008)	(159,094)	(24,102)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	458,446	465,163	224,307
Principal payments on revolving line of credit and other long-term debt	(501,990)	(345,231)	(223,959)
Dividends paid	(90)	(90)	(90)
Purchase of treasury stock	(304)	(3,422)	(1,445)
Proceeds from issuance of common shares, net	24,358	0	0
Tax benefit related to vesting of restricted stock	958	680	198
Net (used in) cash provided by financing activities	(18,622)	117,100	(989)
EFFECT OF FOREIGN CURRENCY ON CASH	446	(264)	0
(DECREASE) INCREASE IN CASH	(4,986)	8,948	737
CASH AT BEGINNING OF YEAR	10,455	1,507	770
CASH AT END OF YEAR	5,469	10,455	1,507
Supplemental Cash Flow Information [Abstract]
Cash paid for Interest	5,489	4,285	3,490
Cash paid for Income Taxes	$ 35,697	$ 32,311	$ 14,190