Accumulated Other Comprehensive Loss - Summary of the Tax Effects Allocated to Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Loss
Reclassification adjustment for net gain included in earnings before-tax amount			$ (4)	$ 2
Reclassification adjustment for net gain included in earnings, Tax (expense) or benefit			1
Reclassification adjustment for net gain included in earnings net-of-tax amount			(3)	2
Total before income taxes	$ (857)	$ (2)	(1,600)	810
Other comprehensive loss, Tax (expense) or benefit	217	(2)	405	(206)
Total other comprehensive (loss) income, net of tax	(640)	(2)	(1,195)	604
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Net-of-tax amount			(1,192)
Reclassification adjustment for net gain included in earnings net-of-tax amount			(3)
Total other comprehensive (loss) income, net of tax	(640)	(2)	(1,195)	604
Unrealized (loss) and gain on available for sale securities
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Net-of-tax amount			82
Reclassification adjustment for net gain included in earnings net-of-tax amount			(3)
Total other comprehensive (loss) income, net of tax			79
Unrealized loss Cash flow hedge, Interest rate swap
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Net-of-tax amount			(1,274)
Total other comprehensive (loss) income, net of tax			(1,274)
Unrealized loss Cash flow hedge, Interest rate swap | Interest rate swap
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Before-tax amount	(137)		(866)
Unrealized gain (loss) on investments, Tax (expense) or benefit	35		220
Unrealized gain (loss) on investments, Net-of-tax amount	(102)		(646)
Unrealized loss Cash flow hedge, Interest rate swap | Interest rate swap, unconsolidated affiliates
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Before-tax amount	(841)		(841)
Unrealized gain (loss) on investments, Tax (expense) or benefit	213		213
Unrealized gain (loss) on investments, Net-of-tax amount	(628)		(628)
Unrestricted available-for-sale, Debt securities | Unrealized (loss) and gain on available for sale securities
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Before-tax amount	106	(9)	106	790
Unrealized gain (loss) on investments, Tax (expense) or benefit	(27)	2	(27)	(201)
Unrealized gain (loss) on investments, Net-of-tax amount	79	(7)	79	589
Restricted | Unrealized (loss) and gain on available for sale securities
Accumulated Other Comprehensive Loss
Unrealized gain (loss) on investments, Before-tax amount	15	7	5	18
Unrealized gain (loss) on investments, Tax (expense) or benefit	(4)	(2)	(2)	(5)
Unrealized gain (loss) on investments, Net-of-tax amount	$ 11	$ 5	$ 3	$ 13