Note 5 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	United					United
	States		Canada			Kingdom			Australia			Total
Balance at December 31, 2012	$	266,521	$	21,041		$	36,118		$	46,463		$	370,143
Goodwill acquired during the year		350		—			2,674			—			3,024
Adjustments to prior year acquisitions		6,199		—			—			(592	)		5,607
Effect of foreign currency translation		—		(1,762	)		801			(8,501	)		(9,462	)
Balance at December 31, 2013		273,070		19,279			39,593			37,370			369,312
Goodwill acquired during the year		128,426		—			1,640			5,968			136,034
Adjustments to prior year acquisitions		64		—			(324	)		—			(260	)
Effect of foreign currency translation		—		(2,101	)		(2,555	)		(4,751	)		(9,407	)
Balance at December 31, 2014	$	401,560	$	17,178		$	38,354		$	38,587		$	495,679

Schedule of Finite-Lived Intangible Assets [Table Text Block]

					December 31, 2013
	Estimated useful lives (months)				Gross carrying amount		Accumulated amortization			Net carrying value
Amortizable intangible assets:
Customer relationships		40	to	60	$	201,395	$	(132,153	)	$	69,242
Tradenames		45	to	84		59,813		(36,164	)		23,649
Covenants not to compete			36			4,714		(2,986	)		1,728
Technology		24	to	40		7,507		(7,262	)		245
Totals					$	273,429	$	(178,565	)	$	94,864

					December 31, 2014
	Estimated useful lives (months)				Gross carrying amount		Accumulated amortization			Net carrying value
Amortizable intangible assets:
Customer relationships		40	to	60	$	244,211	$	(167,943	)	$	76,268
Tradenames		45	to	84		68,264		(45,901	)		22,363
Covenants not to compete			36			6,761		(4,116	)		2,645
Technology		24	to	40		9,188		(7,881	)		1,307
Totals					$	328,424	$	(225,841	)	$	102,583

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

	Amount
Years ended December 31:
2015	$	46,827
2016		33,363
2017		20,625
2018		1,382
2019		386
Total	$	102,583