Benefit Plans - Components of Company Plan Benefit Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Change in Projected Benefit Obligation
Projected benefit obligation, beginning of period			$ 37,551	$ 32,474	$ 32,474
Service cost	$ 313	$ 250	627	499	998
Interest cost	326	$ 348	653	696	1,393
Actuarial gain			0		3,449
Other reclassification			(8,925)		0
Benefits paid			(375)		(763)
Projected benefit obligation, end of period	29,531		29,531		37,551
Change in Plan Assets
Plan assets at fair value, beginning of period			0	$ 0	0
Company contributions			375		763
Benefits paid			(375)		(763)
Plan assets at fair value, end of period	0		0		0
Unfunded Status of the Plan	$ 29,531		$ 29,531		$ 37,551