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Employee Benefit Plans 7 (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee benefit plans
Fair Value	$ 233,524	$ 213,147	$ 192,477
Unfunded Commitments	0	0
Cash equivalents
Employee benefit plans
Fair Value	637	589
Unfunded Commitments	0	0
Fixed income fund
Employee benefit plans
Fair Value	87,760	76,221
Unfunded Commitments	0	0
Total equity funds
Employee benefit plans
Fair Value	131,555	126,002
Unfunded Commitments	0
U.S. small/mid cap funds
Employee benefit plans
Fair Value	58,451	21,837
Unfunded Commitments	0	0
U.S. large cap funds
Employee benefit plans
Fair Value	22,143	53,677
Unfunded Commitments	0	0
International funds
Employee benefit plans
Fair Value	50,961	50,488
Unfunded Commitments	0	0
Real estate funds
Employee benefit plans
Fair Value	13,572	10,335
Unfunded Commitments	$ 0	$ 0

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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