Schedule II - Valuation and Qualifying Accounts and Reserves (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Valuation Allowances and Reserves [Table Text Block]

	Balance at		Charged to
	Beginning of		Costs and						Balance at
Description	Year		Expenses		Deductions				End of Year
Insurance and claims accruals:
Year ended December 31, 2019	$	28,103	$	56,075	$	(52,449	)	(1)	$	31,729
Year ended December 31, 2018		26,177		56,122		(54,196	)	(1)		28,103
Year ended December 31, 2017		19,440		53,609		(46,872	)	(1)		26,177
Allowance for doubtful accounts:
Year ended December 31, 2019		348		65		(31	)	(2)		382
Year ended December 31, 2018		300		163		(115	)	(2)		348
Year ended December 31, 2017		275		33		(8	)	(2)		300