Employee Benefit Plans (Fair Value of Pension Plan Assets) (Details) - Pension Benefits - USD ($) $ in Thousands		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 199,000		$ 294,500	$ 295,700
Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		198,800		294,300
Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		200		200
Small-cap fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	3,900		6,100
Small-cap fund | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	3,900		6,100
Small-cap fund | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Small-cap fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Mid-cap fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	3,900		6,000
Mid-cap fund | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	3,900		6,000
Mid-cap fund | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Mid-cap fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Large-cap fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	31,300		48,000
Large-cap fund | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	31,300		48,000
Large-cap fund | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Large-cap fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
International equity fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		20,200	[1]	30,100
International equity fund | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		20,200	[1]	30,100
International equity fund | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
International equity fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Long-term investment grade bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	128,300		197,100
Long-term investment grade bond funds | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	128,300		197,100
Long-term investment grade bond funds | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Long-term investment grade bond funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Short-term investment fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,200		7,000
Short-term investment fund | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,200		7,000
Short-term investment fund | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Short-term investment fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Group annuity contract
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		200		200
Group annuity contract | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Group annuity contract | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Group annuity contract | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 200		$ 200

[1] We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.