(3)	Receivables

Receivables consisted of the following at December 31, (amounts in thousands):

	2015			2014
Trade receivables	$	145,418		$	158,400
Unbilled rental revenue		5,363			5,772
Income tax receivables		1,273			3,434
Other		3			17
		152,057			167,623
Less allowance for doubtful accounts		(4,729	)		(3,288	)
Total receivables, net	$	147,328		$	164,335

We charge off customer account balances when we have exhausted reasonable collection efforts and determined that the likelihood of collection is remote.