Income Taxes and Related Payments - Components of deferred tax assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Deferred tax assets:
Amortizable basis	$ 440,218	$ 459,893
Other	44,768	38,009
Total deferred tax assets	484,986	497,902
Less: valuation allowance	0	0
Deferred tax assets	$ 484,986	$ 497,902