Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2011

Fair Value Measurements (Tables) [Abstract]

Fair value of assets and liabilities on a recurring basis

			Quoted Prices
			in Active		Significant
			Markets for		Other
	Balance at		Identical		Observable		Unobservable
	June 30,		Assets		Inputs		Inputs
	2011		(Level 1)		(Level 2)		(Level 3)
ASSETS
Cash and cash equivalents (1)	$	124,054	$	124,054	$	—	$	—
Restricted cash		4,487		4,487		—		—
Marketable securities (2)		1,110		1,110		—		—
	$	129,651	$	129,651	$	—	$	—
LIABILITIES
Contingent consideration related to acquisitions	$	1,616	$	—	$	—	$	1,616
	$	1,616	$	—	$	—	$	1,616

(1)	Cash and cash equivalents consists of money market funds and certificates of deposit.
(2)	Marketable securities consists of municipal fixed-income municipal securities.

			Quoted Prices
			in Active		Significant
			Markets for		Other
	Balance at		Identical		Observable		Unobservable
	March 31,		Assets		Inputs		Inputs
	2011		(Level 1)		(Level 2)		(Level 3)
ASSETS
Cash and cash equivalents (1)	$	116,617	$	116,617	$	—	$	—
Restricted cash		3,787		3,787		—		—
Marketable securities (2)		1,120		1,120		—		—
	$	121,524	$	121,524	$	—	$	—
LIABILITIES
Contingent consideration related to acquisitions	$	13,658	$	—	$	12,743	$	915
	$	13,658	$	—	$	12,743	$	915

(1)	Cash and cash equivalents consists of money market funds and certificates of deposit.
(2)	Marketable securities consists of municipal fixed-income municipal securities.

Company's assets and liabilities measured at fair value using significant unobservable inputs (Level 3)

	Liabilities
Balance at April 1, 2011	$	915
Acquisition (Note 3)		800
Earnout payments		(99	)
Balance at June 30, 2011	$	1,616