Note 5 - Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)	[1]
UNITED STATES
Balance	$ 412,502
Goodwill acquired during the year	70,378
Adjustments to prior year acquisitions	$ 738
Effect of foreign currency translation
Balance	$ 483,618
CANADA
Balance	$ 15,364
Goodwill acquired during the year
Adjustments to prior year acquisitions	$ 2
Effect of foreign currency translation	1,435
Balance	16,801
UNITED KINGDOM
Balance	$ 49,428
Goodwill acquired during the year
Adjustments to prior year acquisitions	$ (251)
Effect of foreign currency translation	(1,531)
Balance	47,646
AUSTRALIA
Balance	$ 31,003
Goodwill acquired during the year
Adjustments to prior year acquisitions
Effect of foreign currency translation	$ 2,311
Balance	33,314
Balance	508,297
Goodwill acquired during the year	70,378
Adjustments to prior year acquisitions	489
Effect of foreign currency translation	2,215
Balance	$ 581,379

[1] Goodwill recorded in connection with certain tax benefits to be realized in the Company’s U.S. income tax returns has been reflected in the United States segment.