Income Taxes (Schedule of Effective Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 17,151	$ 22,483	$ 17,693
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	(2,743)	(3,630)	(3,996)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	2,258	1,213	1,153
Income tax expense (benefit) related to the Tax Act	0	19,017	0
Total income tax expense	17,136	39,031	15,381
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 470	$ (52)	$ 531