Cash, Cash Equivalents and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2021

Cash, Cash Equivalents and Marketable Securities [Abstract]

Summary of investments in cash, cash equivalents and marketable securities

The following table summarizes our cash and investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	March 31, 2021						December 31, 2020
(in thousands)	Cash & Cash Equivalents		Marketable Securities		Total		Cash & Cash Equivalents		Marketable Securities		Total
Overnight holdings	$	432,607	$	—	$	432,607	$	503,221	$	—	$	503,221
Investment holdings	48,278		34,292		82,570		47,992		34,529		82,521
Cash in demand accounts	23,105		—		23,105		33,692		—		33,692
Outstanding checks	(9,213)		—		(9,213)		(30,059)		—		(30,059)
Total	$	494,777	$	34,292	$	529,069	$	554,846	$	34,529	$	589,375