Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table sets forth our changes in accumulated other comprehensive income:

	Year Ended December 31,
	2020		2019		2018
	(Dollars in thousands)
Unrealized gains (losses) on available-for-sale marketable securities (1) :
Beginning balance	$	—	$	—	$	3,992
Adoption of ASU 2018-02 (Note 2)	—		—		860
Adoption of ASU 2016-01 (Note 2)	—		—		(4,852)
Ending balance	$	—	$	—	$	—

(1)All amounts net-of-tax.