Fair Value Measurement - Methodologies Other Than Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Carrying Value
Financial assets:
Other assets	$ 28,645	$ 35,921
Financial liabilities:
Other liabilities	27,953	21,300
Carrying Value | Senior Notes
Financial liabilities:
Debt	250,000	250,000
Carrying Value | Mortgage Loans
Financial liabilities:
Debt	37,617	39,064
Fair Value
Financial assets:
Other assets	28,650	35,468
Financial liabilities:
Other liabilities	27,953	21,300
Fair Value | Senior Notes
Financial liabilities:
Debt	273,865	264,810
Fair Value | Mortgage Loans
Financial liabilities:
Debt	37,617	39,064
BOLI | Carrying Value
Financial assets:
Other investments	66,112	64,096
BOLI | Fair Value
Financial assets:
Other investments	66,112	64,096
Other investments | Carrying Value
Financial assets:
Other investments	2,931	2,943
Other investments | Fair Value
Financial assets:
Other investments	$ 2,931	$ 2,943