ALLOWANCE FOR DOUBTFUL ACCOUNTS: (Tables)

12 Months Ended

Mar. 31, 2013

ALLOWANCE FOR DOUBTFUL ACCOUNTS:

Summary of the activity of the allowance for doubtful accounts, returns and credits

A summary of the activity of the allowance for doubtful accounts, returns and credits is as follows (dollars in thousands):

	Balance at beginning of period		Additions charged to costs and expenses		Other changes			Bad debts written off, net of amounts recovered			Balance at end of period
2011:
Allowance for doubtful accounts, returns and credits	$	6,341	$	940	$	198		$	(1,857	)	$	5,622
2012:
Allowance for doubtful accounts, returns and credits	$	5,622	$	1,731	$	(164	)	$	(2,313	)	$	4,876
2013:
Allowance for doubtful accounts, returns and credits	$	4,876	$	902	$	(112	)	$	(1,525	)	$	4,141