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Employee Benefit Plans (Actual Plan Asset Allocations) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 50,829 $ 43,056
Defined Benefit Plan, Actual Plan Asset Allocations 100.00% 100.00%
Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 34,125 $ 26,892
Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 16,704 16,164
Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 247 $ 1,834
Defined Benefit Plan, Actual Plan Asset Allocations 0.50% 4.30%
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 247 $ 1,834
Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 23,145 $ 18,662
Defined Benefit Plan, Actual Plan Asset Allocations 45.50% 43.30%
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 6,441 $ 2,498
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets 16,704 16,164
U.S. Government and Agencies [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,904 $ 1,394
Defined Benefit Plan, Actual Plan Asset Allocations 3.70% 3.20%
U.S. Government and Agencies [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,904 $ 1,394
Taxable Municipal Bonds and Notes [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 4,555 $ 4,363
Defined Benefit Plan, Actual Plan Asset Allocations 8.90% 10.10%
Taxable Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 4,555 $ 4,363
Corporate Bonds and Notes [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 9,588 $ 9,931
Defined Benefit Plan, Actual Plan Asset Allocations 18.90% 23.10%
Corporate Bonds and Notes [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 9,588 $ 9,931
Preferred Stock [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 657 $ 476
Defined Benefit Plan, Actual Plan Asset Allocations 1.30% 1.10%
Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 657 $ 476
Fixed Income Mutual Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 6,441 $ 2,498
Defined Benefit Plan, Actual Plan Asset Allocations 12.70% 5.80%
Fixed Income Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 6,441 $ 2,498
Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 27,437 $ 22,560
Defined Benefit Plan, Actual Plan Asset Allocations 54.00% 52.40%
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 27,437 $ 22,560
Large Cap [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 21,460 $ 17,454
Defined Benefit Plan, Actual Plan Asset Allocations 42.20% 40.50%
Large Cap [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 21,460 $ 17,454
Mid Cap [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,660 $ 1,342
Defined Benefit Plan, Actual Plan Asset Allocations 3.30% 3.10%
Mid Cap [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,660 $ 1,342
Small Cap [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,009 $ 884
Defined Benefit Plan, Actual Plan Asset Allocations 2.00% 2.10%
Small Cap [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 1,009 $ 884
International [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 3,308 $ 2,880
Defined Benefit Plan, Actual Plan Asset Allocations 6.50% 6.70%
International [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets $ 3,308 $ 2,880