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EXIT ACTIVITIES AND RESTRUCTURING (Tables)
 12 Months Ended
Dec. 31, 2017
Restructuring and Related Activities [Abstract]  
Schedule of Transactions and Balances for Exit Activities and Restructuring Charges
The following table displays the transactions and balances for exit activities and restructuring charges (in thousands). We include initial charges and plan adjustments in “Exit activities, restructuring and impairments” in the accompanying statements of operations and comprehensive loss for the years ended December 31, 2017, 2016 and 2015. Our real estate obligations are substantially related to our INAP COLO segment. Severance is spread across both reportable segments. 
 
 
Balance December 31, 2016
 
Initial
Charges
 
Plan
Adjustments
 
Cash
Payments
 
Balance December 31, 2017
Activity for 2017 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligations
 
$
—

 
$
3,359

 
$
1,741

 
$
(1,720
)
 
$
3,380

Activity for 2016 restructuring charge:
 
 
 
 
 
 
 
 
 
 
Severance
 
1,911

 
—

 
957

 
(2,822
)
 
46

Real estate obligations
 
933

 
—

 
82

 
(768
)
 
247

Activity for 2015 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligation
 
111

 
—

 
—

 
(47
)
 
64

Service contracts
 
565

 
—

 
21

 
(198
)
 
388

Activity for 2014 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligations
 
1,183

 
—

 
131

 
(623
)
 
691

 
 
$
4,703

 
$
3,359

 
$
2,932

 
$
(6,178
)
 
$
4,816

 
 
Balance December 31, 2015
 
Initial
Charges
 
Plan
Adjustments
 
Cash
Payments
 
Balance December 31, 2016
Activity for 2016 restructuring charge:
 
 
 
 
 
 
 
 
 
 
Severance
 
$
—

 
$
2,444

 
$
—

 
$
(533
)
 
$
1,911

Real estate obligations
 
—

 
1,082

 
14

 
(163
)
 
933

Service contracts
 
—

 
42

 
(21
)
 
(21
)
 
—

Activity for 2015 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligation
 
164

 
—

 
(13
)
 
(40
)
 
111

Service contracts
 
843

 
—

 
9

 
(287
)
 
565

Activity for 2014 restructuring charge:
 
 

 
 

 
 
 
 
 
 

Real estate obligations
 
1,701

 
—

 
104

 
(622
)
 
1,183

Activity for 2007 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligation
 
1,170

 
—

 
747

 
(1,917
)
 
—

 
 
$
3,878

 
$
3,568

 
$
840

 
$
(3,583
)
 
$
4,703

 
 
 
Balance December 31, 2014
 
Initial
Charges
 
Plan
Adjustments
 
Cash
Payments
 
Balance December 31, 2015
Activity for 2015 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligations
 
$
—

 
$
270

 
$
—

 
$
(106
)
 
$
164

Service contracts
 
—

 
1,268

 
—

 
(425
)
 
843

Activity for 2014 restructuring charge:
 
 

 
 

 
 

 
 

 
 

Real estate obligation
 
2,010

 
—

 
244

 
(553
)
 
1,701

Activity for 2007 restructuring charge:
 
 
 
 
 
 
 
 
 
 
Real estate obligation
 
2,325

 
—

 
660

 
(1,815
)
 
1,170

Other
 
175

 
—

 
(6
)
 
(169
)
 
—

 
 
$
4,510

 
$
1,538

 
$
898

 
$
(3,068
)
 
$
3,878