Note 13 - Segment and Geographical Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting Disclosure [Text Block]

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

Revenues:	For the three months ended June 30,				For the six months ended June 30,
	2012		2013		2012		2013
United States	$	88,462	$	95,493	$	175,657	$	186,671
Canada		7,018		8,275		13,904		15,696
United Kingdom		32,297		35,274		61,954		69,041
Australia		—		17,106		—		33,443
Total	$	127,777	$	156,148	$	251,515	$	304,851

Disclosure on Geographic Areas, Long-Lived Assets

Long-lived assets: (1)	December 31,		June 30,
	2012		2013
United States	$	337,831	$	321,393
Canada		34,919		28,599
United Kingdom		99,140		91,127
Australia		94,291		78,736
Total	$	566,181	$	519,855