Cash Deposits and Other Assets (Tables)

6 Months Ended

Jun. 30, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Components of cash deposits and other assets

Components of cash deposits and other assets were as follows at the dates indicated (in thousands):

	June 30,		December 31,
	2018		2017
Amounts associated with liability insurance program:
Insurance collateral deposits	$	3,517	$	3,767
Excess loss fund	2,093		2,284
Accumulated interest income	642		814
Other amounts:
State collateral deposits	57		57
Materials and supplies	273		273
Other	36		37
Total	$	6,618	$	7,232