Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 172,440	$ 152,969	$ 349,766	$ 289,187
Service revenues	255,644	251,353	502,443	468,754
Total revenues	428,084	404,322	852,209	757,941
Cost of sales	114,163	103,456	233,850	197,523
Cost of services	219,656	215,174	434,506	403,700
Gross profit	94,265	85,692	183,853	156,718
Operating expenses:
Staffing expense	21,605	20,300	43,720	39,907
Selling, general and administrative expense	44,767	42,555	91,164	84,936
Supplemental put expense	1,667	2,565	4,895	16,991
Management fees	3,935	3,709	7,778	7,373
Amortization expense	7,689	7,477	15,391	13,600
Impairment expense			7,700
Operating income (loss)	14,602	9,086	13,205	(6,089)
Other income (expense):
Interest income		2	2	17
Interest expense	(2,340)	(2,860)	(4,879)	(5,561)
Amortization of debt issuance costs	(542)	(418)	(1,001)	(836)
Other income, net	345	211	591	391
Income (loss) before income taxes	12,065	6,021	7,918	(12,078)
Provision for income taxes	3,799	6,764	6,219	3,952
Net income (loss)	8,266	(743)	1,699	(16,030)
Net income attributable to noncontrolling interest	1,888	717	2,295	1,399
Net income (loss) attributable to Holdings	$ 6,378	$ (1,460)	$ (596)	$ (17,429)
Basic and fully diluted income (loss) per share attributable to Holdings	$ 0.14	$ (0.04)	$ (0.01)	$ (0.45)
Weighted average number of shares of trust stock outstanding - basic and fully diluted	46,725	40,998	46,725	38,824
Cash distributions declared per share (refer to Note K)	$ 0.36	$ 0.34	$ 0.72	$ 0.68