Cash Deposits and Other Assets (Tables)

3 Months Ended

Mar. 31, 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):

	March 31,		December 31,
	2018		2017
Amounts associated with liability insurance program:
Insurance collateral deposits	$	3,517	$	3,767
Excess loss fund	1,959		2,284
Accumulated interest income	627		814
Other amounts:
State collateral deposits	53		57
Materials and supplies	331		273
Other	36		37
Total	$	6,523	$	7,232