RECEIVABLES, CONTRACT ASSETS, AND DEFERRED REVENUE (Tables)

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

Summary of Receivable

Receivables

(in thousands)	December 31, 2018		December 31, 2017
Accounts receivable	$	180,872	$	222,735
Unbilled receivables	172,656		160,084
Long-term unbilled receivables	151,237		160,708
	$	504,765	$	543,527

Summary of Unbilled Receivables

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

(Dollars in thousands)	December 31, 2018
1 Year or less	$	172,656	54	%
1-2 Years	95,013		29	%
2-5 Years	56,224		17	%
	$	323,893	100	%

Summary of Contract Assets and Deferred Revenue

Contract assets and deferred revenue

(in thousands)	December 31, 2018		December 31, 2017
Contract assets (1)	$	3,711	$	914
Long-term contract assets (2)	2,543		—
	$	6,254	$	914
Deferred revenue	$	185,145	$	165,850
Long-term deferred revenue (3)	5,344		3,706
	$	190,489	$	169,556

⁽¹⁾ Included in other current assets.

⁽²⁾ Included in other long-term assets.

⁽³⁾ Included in other long-term liabilities.