Note 8 - Receivables, Net

9 Months Ended

Sep. 30, 2019

Notes to Financial Statements

Financing Receivables [Text Block]

8.  Receivables, net 

(in thousands)	September 30, 2019		December 31, 2018		September 30, 2018
Contracts completed and in progress:
Billed	$	417,373	$	285,521	$	351,802
Unbilled		182,762		98,755		147,950
Total contracts completed and in progress		600,135		384,276		499,752
Material sales		72,486		45,286		73,282
Other		28,674		44,195		45,125
Total gross receivables		701,295		473,757		618,159
Less: allowance for doubtful accounts		908		511		89
Total net receivables	$	700,387	$	473,246	$	618,070

Receivables include billed and unbilled amounts for services provided to clients for which we have an unconditional right to payment as of the end of the applicable period and do not bear interest. Included in other receivables at  September 30, 2019, December 31, 2018 and September 30, 2018 were items such as estimated recovery from back charge claims, notes receivable, fuel tax refunds and income tax refunds. No such receivables individually exceeded 10% of total net receivables at any of these dates.