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Debt (Tables) | 6 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Components of Debt | The components of debt for the periods indicated were as follows ($000):
| December 31, |  |  | June 30, |
| 2018 |  |  | 2018 |
0.25% convertible senior notes | $ | 345,000 |  |  | $ | 345,000 |
Convertible senior notes unamortized discount attributable to cash conversion option and debt issuance costs including initial purchaser discount |  | (50,155 | ) |  |  | (56,409 | )
Term loan, interest at LIBOR, as defined, plus 1.75% |  | 55,000 |  |  |  | 65,000 |
Line of credit, interest at LIBOR, as defined, plus 1.75% |  | 125,000 |  |  |  | 80,000 |
Credit facility unamortized debt issuance costs |  | (943 | ) |  |  | (1,126 | )
Yen denominated line of credit, interest at LIBOR, as defined, plus 1.75% |  | 2,721 |  |  |  | 2,714 |
Note payable assumed in IPI acquisition |  | 3,834 |  |  |  | 3,834 |
Total debt |  | 480,457 |  |  |  | 439,013 |
Current portion of long-term debt |  | (20,000 | ) |  |  | (20,000 | )
Long-term debt, less current portion | $ | 460,457 |  |  | $ | 419,013 |
Summary of Total Interest Expense Recognized | The following tables set forth total interest expense recognized related to the Notes for the three and six months ended December 31, 2018 and 2017:
|  |  | Three Months Ended December 31, 2018 |  |  | Six Months Ended December 31, 2018 |
0.25% contractual coupon |  |  | $ | 221 |  |  | $ | 441 |
Amortization of debt discount and debt issuance costs including initial purchaser discount |  |  |  | 3,145 |  |  |  | 6,255 |
Interest expense |  |  | $ | 3,366 |  |  | $ | 6,696 |
|  |  | Three Months Ended December 31, 2017 |  |  | Six Months Ended December 31, 2017 |
0.25% contractual coupon |  |  | $ | 219 |  |  | $ | 297 |
Amortization of debt discount and debt issuance costs including initial purchaser discount |  |  |  | 2,935 |  |  |  | 4,043 |
Interest expense |  |  | $ | 3,154 |  |  | $ | 4,340 |
Remaining Annual Principal Payments of Credit Obligations | Remaining annual principal payments under the Company’s existing credit obligations from December 31, 2018 were as follows:
|  |  |  |  |  |  |  |  |  | U.S. |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Dollar |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Term |  |  | Yen Line |  |  | Line of |  |  | Note |  |  | Convertible |  |  |  |  |
Period |  | Loan |  |  | of Credit |  |  | Credit |  |  | Payable |  |  | Notes |  |  | Total |
Year 1 |  | $ | 20,000 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 20,000 |
Year 2 |  |  | 20,000 |  |  |  | 2,721 |  |  |  | - |  |  |  | 3,834 |  |  |  | - |  |  |  | 26,555 |
Year 3 |  |  | 15,000 |  |  |  | - |  |  |  | 125,000 |  |  |  | - |  |  |  | - |  |  |  | 140,000 |
Year 4 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 345,000 |  |  |  | 345,000 |
Year 5 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  | $ | 55,000 |  |  | $ | 2,721 |  |  | $ | 125,000 |  |  | $ | 3,834 |  |  | $ | 345,000 |  |  | $ | 531,555 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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