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Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,016,410	$ 1,144,923
Balance	998,896	1,127,685
Pension Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(236)	2,194
Gains/(losses) recognized in OCI	369	0
Balance	$ 133	$ 2,194

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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