Income Taxes (Schedule of Effective Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 17,709	$ 17,151	$ 22,483
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	(1,252)	(2,743)	(3,630)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	2,706	1,940	931
Write-off of state net operating losses	1,063	283	41
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(1,063)	(283)	(41)
Income tax expense (benefit) related to the Tax Act	0	0	19,017
Total income tax expense	20,027	17,136	39,031
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 864	$ 788	$ 230
Effective Income Tax Rate Reconciliation, Percent	23.70%	21.00%	60.80%