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Debt and Credit Facilities - Schedule of Aggregate Amount Debt Repayable (Details) - Private Placement $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($)
Senior Note, Series A |
Debt Instrument [Line Items] |
Debt Amount | $ 50,000
Maturity Date | Jul. 15, 2021
Interest Rate | 4.44%
Senior Note, Series B |
Debt Instrument [Line Items] |
Debt Amount | $ 100,000
Maturity Date | Jul. 15, 2024
Interest Rate | 4.98%
Senior Note, Series C |
Debt Instrument [Line Items] |
Debt Amount | $ 60,000
Maturity Date | Jul. 15, 2026
Interest Rate | 5.13%
Senior Note, Series D |
Debt Instrument [Line Items] |
Debt Amount | $ 40,000
Maturity Date | Jul. 15, 2029
Interest Rate | 5.38%

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