Retirement Benefit Plans - Schedule of Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 23,671	$ 22,370
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,074	7,747
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21,597	14,623
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mid Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	637	1,450
Mid Cap | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	637	1,450
Mid Cap |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mid Cap |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,233
Large Cap | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,233
Large Cap |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Large Cap |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	940	2,660
International | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	940	2,660
International |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Liability Driven Solution CIT I
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,782	3,106
Wells Fargo Liability Driven Solution CIT I | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Liability Driven Solution CIT I |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,782	3,106
Wells Fargo Liability Driven Solution CIT I |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Liability Driven Solution CIT II
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,026
Wells Fargo Liability Driven Solution CIT II | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Wells Fargo Liability Driven Solution CIT II |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,026
Wells Fargo Liability Driven Solution CIT II |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Wells Fargo BlackRock International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	616	959
Wells Fargo BlackRock International Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock International Equity |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	616	959
Wells Fargo BlackRock International Equity |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Core Bond
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,552
Wells Fargo Core Bond | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Wells Fargo Core Bond |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,552
Wells Fargo Core Bond |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Wells Fargo/Causeway International Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	586	923
Wells Fargo/Causeway International Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/Causeway International Value |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	586	923
Wells Fargo/Causeway International Value |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Large Cap Growth Index Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	950	1,268
Wells Fargo BlackRock Large Cap Growth Index Fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Large Cap Growth Index Fund |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	950	1,268
Wells Fargo BlackRock Large Cap Growth Index Fund |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Large Cap Value Index Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	968	1,240
Wells Fargo BlackRock Large Cap Value Index Fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Large Cap Value Index Fund |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	968	1,240
Wells Fargo BlackRock Large Cap Value Index Fund |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Multi-Manager Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,015	1,544
Wells Fargo Multi-Manager Small Cap | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Multi-Manager Small Cap |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,015	1,544
Wells Fargo Multi-Manager Small Cap |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Russell 2000 Index Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	332	702
Wells Fargo BlackRock Russell 2000 Index Fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock Russell 2000 Index Fund |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	332	702
Wells Fargo BlackRock Russell 2000 Index Fund |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock S&P Mid Cap Index Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	419	781
Wells Fargo BlackRock S&P Mid Cap Index Fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo BlackRock S&P Mid Cap Index Fund |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	419	781
Wells Fargo BlackRock S&P Mid Cap Index Fund |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/MFS Value CIT F
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	469	627
Wells Fargo/MFS Value CIT F | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/MFS Value CIT F |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	469	627
Wells Fargo/MFS Value CIT F |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/T. Rowe Price Large-Cap Growth Managed CIT
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	465	639
Wells Fargo/T. Rowe Price Large-Cap Growth Managed CIT | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/T. Rowe Price Large-Cap Growth Managed CIT |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	465	639
Wells Fargo/T. Rowe Price Large-Cap Growth Managed CIT |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/T. Rowe Price Equity Income Managed CIT
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	487	643
Wells Fargo/T. Rowe Price Equity Income Managed CIT | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo/T. Rowe Price Equity Income Managed CIT |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	487	643
Wells Fargo/T. Rowe Price Equity Income Managed CIT |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Voya Large Cap Growth CIT F
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	482	639
Wells Fargo Voya Large Cap Growth CIT F | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Wells Fargo Voya Large Cap Growth CIT F |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	482	639
Wells Fargo Voya Large Cap Growth CIT F |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash & Short-term Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	497	404
Cash & Short-term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	497	404
Cash & Short-term Investments |   Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash & Short-term Investments |   Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0