Fair Value (Tables)

6 Months Ended

Oct. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The carrying amounts and estimated fair values of our financial instruments are as follows:

(in 000s)
As of	October 31, 2017				October 31, 2016				April 30, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Assets:
Cash and cash equivalents	$	180,997	$	180,997	$	232,510	$	232,510	$	1,011,331	$	1,011,331
Cash and cash equivalents - restricted	100,665		100,665		109,538		109,538		106,208		106,208
Receivables, net - short-term	77,750		77,750		104,764		104,764		162,775		162,775
Receivables, net - long-term	62,549		62,549		56,238		56,238		52,898		52,898
Liabilities:
Long-term debt (excluding debt issuance costs)	1,502,654		1,606,583		1,968,109		2,067,234		1,502,735		1,569,033
Contingent consideration	10,145		10,145		7,817		7,817		10,428		10,428