Debt (Details) € in Thousands, £ in Thousands, $ in Thousands |
3 Months Ended |
12 Months Ended |
|
|
|
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2017 |
Mar. 31, 2020
USD ($)
|
Mar. 31, 2019
USD ($)
|
Feb. 27, 2017
GBP (£)
|
Feb. 27, 2017
USD ($)
|
Feb. 27, 2017
EUR (€)
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Senior Notes |
|
$ 350,000
|
|
$ 878,409
|
$ 884,967
|
|
|
|
| Long-term Debt, Current Maturities |
[1] |
|
|
35,000
|
|
|
|
|
| Line of Credit Facility, Maximum Borrowing Capacity |
|
|
|
1,000,000
|
|
|
|
|
| Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Net |
|
|
|
(3,337)
|
(3,619)
|
|
|
|
| Other Long-term Debt, Noncurrent |
|
|
|
0
|
33
|
|
|
|
| Line of Credit Facility, Amount Outstanding |
|
|
|
275,449
|
301,846
|
|
|
|
| Long-term Debt |
|
|
|
1,153,858
|
|
|
|
|
| Long-term Debt |
|
|
|
1,150,521
|
$ 1,183,227
|
|
|
|
| Long-term Debt, Maturities, Repayments of Principal in Year Two |
|
|
|
0
|
|
|
|
|
| Long-term Debt, Maturities, Repayments of Principal in Year Three |
|
|
|
366,449
|
|
|
|
|
| Long-term Debt, Maturities, Repayments of Principal in Year Four |
|
|
|
0
|
|
|
|
|
| Long-term Debt, Maturities, Repayments of Principal after Year Five |
|
|
|
752,409
|
|
|
|
|
| 10 year maturity |
|
|
|
|
|
|
|
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| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
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| Debt Instrument, Term |
|
10 years
|
10 years
|
|
|
|
|
|
| 12 year maturity |
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Debt Instrument, Term |
|
10 years
|
|
|
|
|
|
|
| 15 year maturity |
|
|
|
|
|
|
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| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Debt Instrument, Term |
|
15 years
|
|
|
|
|
|
|
| Debt Instrument, Maturity Date, Description |
|
|
P15Y
|
|
|
|
|
|
| Revolving Credit Facility [Member] |
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Line of Credit Facility, Maximum Borrowing Capacity |
|
|
|
$ 500,000
|
|
|
|
|
| United States of America, Dollars |
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Senior Notes |
|
|
|
|
|
|
$ 95,000
|
|
| United Kingdom, Pounds |
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Senior Notes | £ |
|
|
|
|
|
£ 75,000
|
|
|
| Euro Member Countries, Euro |
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
| Senior Notes | € |
|
|
|
|
|
|
|
€ 99,000
|
|
|