Accounts Receivable, net (Tables)

3 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable at March 31, 2015 and December 31, 2014 were as follows (in thousands):

	March 31,		December 31,
	2015		2014
Trade accounts receivable, net of allowance
of $2,408 and $2,477, respectively	$	249,954	$	291,140
Unbilled revenue	75,976		62,993
Taxes receivable	36,802		32,056
Affiliated (1)	3,823		3,370
Other receivables	5,001		1,418
Total accounts receivable	$	371,556	$	390,977

(1) Amounts represent expenditures on behalf of non-consolidated affiliates and receivables for aircraft charter income.