Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Taxes Payable, Current	$ 59,300	$ 30,800
Deferred Tax Assets, Valuation Allowance	41,083	46,371
Unused Federal operating loss carryforwards	0
Unused State operating loss carryforwards	546,300
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	2,200
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,376	6,981
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		100
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	200	(700)	$ (200)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,300	1,500
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 5,288	32,036	15,721
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	21.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 5,300
LIHTC Investments
Other Tax Expense (Benefit)	28,100	20,000	14,000
Income Tax Expense [Member] | LIHTC Investments
Amortization	23,500	$ 16,700	$ 11,900
Foreign Tax Credit [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	1,100
Expires 2018 [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 4,200