Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Taxes [Abstract]

Reconciliation Of Provision For Income Taxes

	For the three months ended
	March 31,
	2018		2017
Consolidated tax provision at federal statutory rate	21.0	%	35.0	%
State income tax provisions, net of federal income
tax benefit	7.2		0.2
Remeasurement of certain deferred tax balances	(11.9)		-
Tax reserve adjustment	1.2		(0.6)
Changes in certain deferred tax balances	14.2		-
Shared-based payments	10.6		(1.8)
Federal research and development tax credit	(2.0)		0.9
All other, net	0.8		0.5
Effective tax rate	41.1	%	34.2	%