RECEIVABLES, CONTRACT ASSETS, AND DEFERRED REVENUE (Tables)

9 Months Ended

Sep. 30, 2018

Summary of Receivable

Receivables

(in thousands)	September 30,         2018		December 31,         2017
Accounts receivable	$	150,733	$	222,735
Unbilled receivables		155,964		158,898
Long-term unbilled receivables		168,929		160,708
	$	475,626	$	542,341

Summary of Unbilled Receivables

Unbilled receivables are expected to be billed in the future as follows:

(Dollars in thousands)	September 30,         2018
1 Year or Less	$	155,964	48%
1-2 Years		89,177	27%
2-5 Years		79,752	25%
	$	324,893	100%

Summary of Contract Assets and Deferred Revenue

Contract assets and deferred revenue

(in thousands)	September 30,         2018		December 31,         2017
Contract assets(1)	$	2,888	$	914
Long-term contract assets(2)		1,581		—
	$	4,469	$	914
Deferred revenue	$	158,178	$	166,297
Long-term deferred revenue(3)		5,840		3,706
	$	164,018	$	170,003

  ⁽¹⁾ Included in other current assets.

  ⁽²⁾ Included in other long-term assets.

  ⁽³⁾ Included in other long-term liabilities.