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COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future minimum lease payments under non-cancelable capital and operating leases with an original term exceeding one year
Future minimum lease payments at December 31, 2018 under non-cancelable operating leases with an original term exceeding one year are as follows:
(in thousands)
 
Operating lease obligations
 
 
 
2019
 
$
17,600

2020
 
14,137

2021
 
9,849

2022
 
5,558

2023
 
3,441

Thereafter
 
1,323

 
 
 
 
 
$
51,908