Income Taxes (Tables)

6 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Schedule of federal tax rate and actual income tax expense reconciliation

The sources and tax effects of the differences are as follows:

	Six Months Ended June 30,
	2020		2019
U.S. federal statutory tax rate	21.0	%	21.0	%
State income taxes, net of federal tax benefit	(0.6)		1.7
General business credits	(6.6)		(1.5)
Employee stock-based compensation	1.8		(3.7)
IRC 162(m) limitation	8.1		2.4
Nondeductible expenses	0.7		0.1
Other	(0.5)		0.2
Effective tax rate	23.9	%	20.2	%

Schedule of income tax contingencies

The reconciliation of the beginning unrecognized tax benefits balance to the ending balance is as follows:

	Six Months Ended June 30,
	2020		2019
	(In thousands)
Beginning balance	$	8,398	$	6,965
Increases related to positions taken during prior years	235		—
Increases related to positions taken during the current year	1,200		1,569
Ending balance	$	9,833	$	8,534
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	$	9,660	$	8,481