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INTEREST EXPENSE
 6 Months Ended
Jun. 30, 2017
Interest Expense [Abstract]  
INTEREST EXPENSE
14.    INTEREST EXPENSE
Interest expense comprised the following for the three and six months ended June 30, 2017 and 2016:
 
For the Three Months
Ended June 30,
 
For the Six Months
Ended June 30,
 
2017

 
2016

 
2017

 
2016

Interest on long-term debt and other financing arrangements
$
20,484

 
$
26,901

 
$
42,805

 
$
59,553

Amortization of capitalized debt issuance costs
1,489

 
2,302

 
2,923

 
6,201

Amortization of debt issuance discount
—

 
342

 
—

 
12,945

Total interest expense
$
21,973

 
$
29,545

 
$
45,728

 
$
78,699


We paid cash interest (including mandatory cash-pay Guarantee Fees) of US$ 21.2 million and US$ 35.7 million during the six months ended June 30, 2017 and 2016, respectively. In addition, we paid US$ 7.1 million and US$ 20.0 million of Guarantee Fees in cash during the six months ended June 30, 2017 and 2016, respectively, for which we had the option to pay in kind.