Financing Arrangements - Credit Agreement (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Line of Credit Facility [Line Items] | ||||
| Line of Credit Facility, Commitment Fee Percentage | 0.30% | |||
| Line of Credit Facility, Periodic Payment, Interest | $ 300,000 | $ 100,000 | $ 400,000 | $ 100,000 |
| Line of Credit Facility, Covenant Terms | a minimum consolidated net worth, defined as EHI’s total stockholders’ equity excluding any accumulated other comprehensive income or loss, of no less than $800.0 million; and (ii) a debt to total capitalization ratio of no more than 35%, in each case as determined in accordance with the Credit Agreement | |||
| Line of Credit Facility, Covenant Compliance | EHI has remained in compliance with all of the covenants associated with the Credit Agreement since its inception | |||
| Debt Issuance Costs, Gross | 200,000 | $ 200,000 | ||
| Line of Credit Facility, Fair Value of Amount Outstanding | 20,000,000.0 | $ 20,000,000.0 | ||
| Line of Credit Facility, Interest Rate During Period | 5.15% | |||
| Base Rate | ||||
| Line of Credit Facility [Line Items] | ||||
| Debt Instrument, Description of Variable Rate Basis | a base rate, defined as the higher of the Prime Rate, the Federal Funds Rate plus 0.50% and the Adjusted Term SOFR for a one-month tenor plus 1.00% | |||
| Secured Overnight Financing Rate (SOFR) | ||||
| Line of Credit Facility [Line Items] | ||||
| Debt Instrument, Description of Variable Rate Basis | an Adjusted Term SOFR, defined as the applicable Adjusted Term SOFR, plus 1.50% | |||
| Maximum [Member] | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of Credit Facility, Current Borrowing Capacity | 35,000,000.0 | $ 35,000,000.0 | ||
| Line of Credit Facility, Commitment Fee Percentage | 0.55% | |||
| Line of Credit Facility, Commitment Fee Amount | $ 75,000 | |||
| Minimum [Member] | ||||
| Line of Credit Facility [Line Items] | ||||
| Line of Credit Facility, Current Borrowing Capacity | $ 25,000,000.0 | $ 25,000,000.0 | ||
| Line of Credit Facility, Commitment Fee Percentage | 0.30% | |||