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Deferred Compensation Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Compensation Plans [Line Items]
Imputed interest rate credited to the Deferred Compensation Plan participant's account as a percentage to Moody's Composite Average of Yields on Corporate Bonds	130.00%
Interest expense	$ 26,051	$ 26,193	$ 25,370
Accrued liabilities compensation and benefits [Member]
Deferred Compensation Plans [Line Items]
Deferred compensation liability	2,100	1,100
Other compensation and benefits [Member]
Deferred Compensation Plans [Line Items]
Deferred compensation liability	21,600	18,800
Deferred compensation arrangement with individual [Member]
Deferred Compensation Plans [Line Items]
Interest expense	$ 1,100	$ 1,000	$ 800

X

- Definition

Represents the imputed interest rate credited to the Deferred Compensation Plan participant's account as a percentage to Moody's Composite Average of Yields on Corporate Bonds.

+ References

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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Amount of the cost of borrowed funds accounted for as interest expense.

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