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Credit Agreement (Tables)
 12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Schedule of Credit Agreement

Selected details of our applicable credit agreement as of and for the years ended December 31, 2018 and 2017 were as follows (dollars in thousands):

 

 

 

As of December 31,

 

 

 

2018

 

 

2017 (1)

 

Credit Agreements:

 

 

 

 

 

 

 

 

Credit facility remaining availability

 

$

47,782

 

 

$

89,930

 

Outstanding letters of credit (2)(3)

 

$

2,218

 

 

$

5,070

 

Availability of additional letters of credit (4)

 

$

22,782

 

 

$

54,930

 

Weighted average daily revolving credit borrowings

   for the year ended

 

$

-

 

 

$

-

 

Weighted average annual interest rate

 

 

0.00

%

 

 

0.00

%

Commitment fee rate

 

 

0.30

%

 

 

0.25

%

Letter of credit fee rate

 

 

1.25

%

 

 

0.75

%

________________  

(1)

Amounts listed as of and for the year ended December 31, 2017 relate to our previous credit agreement.

(2)

As of December 31, 2017, $5.1 million of restricted short-term investments provided collateral for our letters of credit.

(3)

As of December 31, 2018 and 2017, outstanding letters of credit not related to the credit agreements totaled $0.3 million and $0.8 million, respectively, which amounts are fully collateralized with restricted cash, which is in addition to the $5.1 million referenced in this Note 11 as of December 31, 2017.

(4)

The letters of credit sublimit of $25.0 million and $60.0 million as of December 31, 2018 and 2017, respectively, under the credit agreements is part of, not in addition to, the $50.0 million and $95.0 million aggregate commitments as of December 31, 2018 and 2017, respectively.