Fair Value Measurements - Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fixed income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 0	$ 0	$ 0	$ 13
Purchases	0	0	0	0
Sales	0	0	0	(13)
Included in earnings and reported as losses incurred, net	0	0	0	0
Balance at end of period	0	0	0	0
Real Estate Acquired
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	6,226	11,639	7,252	14,535
Purchases	1,806	7,107	5,921	15,191
Sales	(6,526)	(8,152)	(11,725)	(19,024)
Included in earnings and reported as losses incurred, net	457	(344)	515	(452)
Balance at end of period	$ 1,963	$ 10,250	$ 1,963	$ 10,250