Lease Obligations - Schedule of Net Operating Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Lease expense charged to operations	$ 4,739	$ 4,467	$ 14,253	$ 12,953
Rental income from premises leased to others	(158)	(203)	(556)	(525)
Net operating lease expense	$ 4,581	$ 4,264	$ 13,697	$ 12,428