Acquisition of Businesses (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended	9 Months Ended
	Jan. 03, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012
Schedule of preliminary purchase prices allocation
Cash paid, net of cash acquired	$ 7,402	$ 7,930	$ 7,402	$ 8,149
Seller notes		200	200		350
Total consideration		8,130	8,130		7,752
Estimated fair value of net tangible assets acquired:
Total current assets		1,341	1,341		363
Total non-current assets		902	902		423
Total liabilities		(581)	(581)		(290)
Net tangible assets acquired		1,662	1,662		496
Tradename		1,900	1,900
Referral relationships		1,100	1,100		57
Non compete		300	300		25
Goodwill		11,263	11,263		10,066
Fair value of noncontrolling interest		(8,095)	(8,095)		(2,892)
Total consideration		$ 8,130	$ 8,130		$ 7,752