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Debt Senior Notes (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended | 24 Months Ended | 48 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2018 | Jul. 31, 2023 | Jul. 31, 2022 | Jan. 15, 2021 | Jan. 14, 2020 | Jan. 14, 2019 | Jul. 31, 2025 | Jul. 31, 2021 | Jun. 30, 2018 | Dec. 31, 2017 | Mar. 01, 2013
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restricted Payments Basket |  |  |  |  |  |  |  |  | $ 214,000 | $ 176,100 |
2025 Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  | $ 250,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  | 5.625% |  |
Debt Instrument, Redemption Price, Percentage |  | 101.406% | 102.813% |  |  |  | 100.00% | 104.219% |  |  |
2021 Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  | $ 300,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  | 6.75% |  |
Debt Instrument, Redemption Price, Percentage |  |  |  | 100.00% | 101.688% | 103.375% |  |  |  |  |
2018 Convertible Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Convertible senior subordinated notes |  |  |  |  |  |  |  |  |  |  | $ 86,250
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  | 3.00%
Debt Conversion, Converted Instrument, Amount | $ 20,309 |  |  |  |  |  |  |  |  |  |
Repayments of Convertible Debt | $ 65,941 |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | 629 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price |  |  |  |  |  |  |  |  |  |  | $ 32.31
Base of restricted payments basket income calculation [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other Restrictions on Payment of Dividends |  |  |  |  |  |  |  |  | $ 125,000 |  |
Percentage of our aggregate consolidated net income added to base amount of calculation [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent restrictions on payment of dividends |  |  |  |  |  |  |  |  | 50.00% |  |
Percentage of our aggregate consolidated net income subtracted from base amount of calculation [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent restrictions on payment of dividends |  |  |  |  |  |  |  |  | 100.00% |  |
Percentage of net cash proceeds from sale of qualified equity interests added to base and income/loss amount in calculation [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percent restrictions on payment of dividends |  |  |  |  |  |  |  |  | 100.00% |  |

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- Definition Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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