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Employee Benefit Plans (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan expense recognized		$ 372,000		$ 743,000
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected total contributions for current fiscal year	$ 0		$ 0
Employer contributions	0	0	0	0
Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 0	$ 158,000	$ 0	$ 276,000

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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- Definition

Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year.

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Amount of cost for defined contribution plan.

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