Fair Value Measurements (Schedule Of Non-Recurring Losses Recognized Using Fair Value Measurements And The Carrying Value Of Any Assets And Liabilities Measured Using Fair Value Estimates) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Assets
Assets, carrying value	$ 7,560	$ 18,012
Assets, non-recurring losses (gains)	0	0
Vacant owned facilities
Assets
Assets, carrying value	2,485	2,527
Assets, non-recurring losses (gains)	0	0
Net assets of acquired businesses
Assets
Assets, carrying value	5,075	15,485
Assets, non-recurring losses (gains)	$ 0	$ 0