Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	For the three months ended
	March 31,
	2019		2018
Consolidated tax provision at federal statutory rate	21.0	%	21.0	%
State income tax provisions, net of federal income
tax benefit	(3.2)		7.2
Remeasurement of certain deferred tax balances	-		(11.9)
Tax reserve adjustment	(0.9)		1.2
Changes in certain deferred tax balances	(38.6)		14.2
Shared-based payments	(4.4)		10.6
Federal research and development tax credit	1.7		(2.0)
All other, net	(1.6)		0.8
Effective tax rate	(26.0)	%	41.1	%