CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 64,081	$ 51,002
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000	5,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	150,000
Common stock, shares issued	93,743	90,215
Common stock, shares outstanding	93,743	90,215