Pensions - Pension Plan Assets at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	$ 229,245	$ 321,495
Equity securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	13,079	12,817
Equity Securities Measured At Net Asset Value [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	5,638	41,032
Debt securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	25,098	36,133
Debt Securities Measured At Net Asset Value [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	173,092	210,492
Real Estate [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	10,331	11,270
Cash and cash equivalents [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	2,007	9,751
Level 1 [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	7,668	10,982
Level 1 [Member] | Equity securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	5,661	1,231
Level 1 [Member] | Debt securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	0	0
Level 1 [Member] | Cash and cash equivalents [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	2,007	9,751
Level 2 [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	32,516	47,719
Level 2 [Member] | Equity securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	7,418	11,586
Level 2 [Member] | Debt securities [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	25,098	36,133
Level 2 [Member] | Cash and cash equivalents [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	0	0
Fair Value Measured at Net Asset Value Per Share
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	189,061	262,794
Fair Value Measured at Net Asset Value Per Share | Equity Securities Measured At Net Asset Value [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	5,638	41,032
Fair Value Measured at Net Asset Value Per Share | Debt Securities Measured At Net Asset Value [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	173,092	210,492
Fair Value Measured at Net Asset Value Per Share | Real Estate [Member]
Fair Value Of Pension Plan Assets [Line Items]
Pension plan assets at fair value	$ 10,331	$ 11,270