Note 12 - Segment Information (Detail) - Information about our segments (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 211,079	$ 204,388	$ 197,481	$ 198,533	$ 185,885	$ 179,356	$ 168,392	$ 167,999	$ 811,481	$ 701,632	$ 620,385
Income from operations									65,772	59,713	54,853
Depreciation and amortization									19,490	15,797	14,791
Capital expenditures									29,783	13,560	7,022
Total assets	747,582				712,429				747,582	712,429	400,895
Spa Operations [Member]
Revenues									507,326	497,532	445,164
Income from operations									42,477	40,903	31,335
Depreciation and amortization									10,926	10,870	10,062
Capital expenditures									2,977	7,603	4,971
Total assets	210,757				221,524				210,757	221,524	213,090
Products [Member]
Revenues									164,714	154,779	133,072
Income from operations									17,548	10,176	10,187
Depreciation and amortization									1,807	1,703	1,815
Capital expenditures									2,213	2,878	1,045
Total assets	178,108				176,703				178,108	176,703	160,014
Schools [Member]
Revenues									78,365	67,527	66,630
Income from operations									3,843	11,152	15,963
Depreciation and amortization									1,071	990	1,054
Capital expenditures									1,563	486	622
Total assets	131,355				131,179				131,355	131,179	93,164
Laser Hair Removal [Member]
Revenues									93,591	12,104
Income from operations									7,728	1,739
Depreciation and amortization									3,866	516
Capital expenditures									15,408	1,756
Total assets	286,170				263,429				286,170	263,429
Other Segment [Member]
Revenues									(32,515)	(30,310)	(24,481)
Income from operations									(5,824)	(4,257)	(2,632)
Depreciation and amortization									1,820	1,718	1,860
Capital expenditures									7,622	837	384
Total assets	$ (58,808)				$ (80,406)				$ (58,808)	$ (80,406)	$ (65,373)