Fair Value Disclosure (On a Recurring Basis) (Details) - Fair value measurements, recurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Level 1
Assets:
Equity securities	$ 12,238	$ 10,120
Assets at fair value	12,238	10,120
Level 2
Assets:
Equity securities	0	0
Assets at fair value	0	0
Level 3
Assets:
Equity securities	0	0
Assets at fair value	0	0
Total
Assets:
Equity securities	12,238	10,120
Assets at fair value	$ 12,238	$ 10,120