Note 5 - Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

	United					United
	States		Canada			Kingdom		Australia			Total
Balance at December 31, 2014	$	401,560	$	17,178		$	38,354	$	38,587		$	495,679
Goodwill acquired during the year		4,654		—			—		—			4,654
Adjustments to prior year acquisitions		471		—			—		—			471
Effect of foreign currency translation		—		(1,551	)		495		(3,266	)		(4,322	)
Balance at June 30, 2015	$	406,685	$	15,627		$	38,849	$	35,321		$	496,482

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

					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

					June 30, 2015
	Estimated useful lives (months)				Gross carrying amount		Accumulated amortization			Net carrying value
Amortizable intangible assets:
Customer relationships		40	to	60	$	245,332	$	(185,655	)	$	59,677
Tradenames		45	to	84		68,627		(49,826	)		18,801
Covenants not to compete			36			9,834		(5,080	)		4,754
Technology		24	to	40		9,184		(8,220	)		964
Totals					$	332,977	$	(248,781	)	$	84,196

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

	Amount
Six months ended December 31, 2015	$	22,906
Years ended December 31:
2016		35,005
2017		22,395
2018		3,007
2019		883
Total	$	84,196