Income Taxes - Reconciliation between the statutory U.S. Federal income tax rate and the Company's effective income tax rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	35.00%
State taxes	3.10%	3.10%	2.50%
Domestic production activities deduction	0.00%	0.00%	(2.10%)
Changes in valuation allowances and reserves	(1.30%)	(1.20%)	1.30%
Changes in tax reserves	(0.30%)	(1.40%)	0.80%
Effect of Tax Cuts and Jobs Act	0.00%	(1.60%)	(5.00%)
Prior year true ups	(0.50%)	(0.40%)	(2.20%)
Foreign adjustments	0.60%	2.40%	1.80%
Other, net	0.20%	(1.60%)	(1.00%)
Effective rate	22.80%	20.30%	31.10%