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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified												6 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member]	Mar. 31, 2013 Fair Value, Measurements, Recurring [Member]	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1	Mar. 31, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2	Mar. 31, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3	Mar. 31, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3	Sep. 30, 2013 Contingent Consideration Liabilities
Levels of fair value measurements of financial assets:
Cash equivalents					$ 1,004		$ 1,004		$ 0		$ 0
Restricted cash	6,751		6,751	6,751	6,751	6,751	6,751	0	0	0	0
Interest rate derivatives		0	(544)		(544)		0		(544)		0
Contingent consideration				(1,846)	(3,250)	0	0	0	0	(1,846)	(3,250)
Financial assets				4,905	3,961	6,751	7,755	0	(544)	(1,846)	(3,250)
Contingent consideration liabilities [Roll Forward]
Fair value, contingent consideration												3,250
Change in fair value												1,500
Accretion of contingent liability												96
Fair value, contingent consideration												$ 1,846

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Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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