Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income taxes receivable	$ 4,300	$ 208,000	$ 4,500
Discrete tax items		6,600
Tax and Jobs Act of 2017, Income Tax Expense (Benefit)		(65,300)
Other items, net tax benefit	7,301	$ 60,196	(46,436)
Other items, TCJA remeasurement	2,300		51,000
Other Items, equity based compensation	$ 900		3,000
Reversal of prior year deferred tax asset impairment			1,000
Deferred REIT distribution			$ 600
Operating loss carryforwards expiration period	20 years
Effective tax rate	23.10%	8.00%	51.40%