Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Expected Federal Statutory Income Tax Rate	21.00%	35.00%	35.00%
Increase/(Decrease):
State and Local Income Taxes, net of Federal Benefit	2.40%	1.90%	1.70%
Non-Deductible Executive Compensation	1.10%	0.00%	0.00%
Federal Rate Adjustment to Deferred Taxes	0.00%	(20.20%)	0.00%
Other	0.40%	(0.50%)	(1.70%)
Effective Tax Rate	24.90%	16.20%	35.00%