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Employee Retirement Plans (Narrative) (Details) | 3 Months Ended
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Jun. 30, 2019 USD ($)
Non-qualified Plan |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Employer contributions | $ 100,000
Expected employer contributions, remainder of fiscal year | 300,000
Qualified Plan |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Employer contributions | 0
Expected employer contributions, remainder of fiscal year | $ 1,000,000.0

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