Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Tables)

v3.20.1
Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of current maturities of contractual obligation
Aggregate future minimum payments under these obligations in effect at March 31, 2020 are as follows (in thousands):
Year ended December 31: Capital Spend Commitments
Minimum Purchase Commitments(a)
Remainder of 2020 $ 3,766    $ 15,834   
2021 —    700   
2022 —    129   
2023 —    8   
2024 —    —   
Thereafter —    —   
$ 3,766    $ 16,671   
a.  Included in these amounts are sand purchase commitments of $13.8 million. Pricing for certain sand purchase agreements is variable and, therefore, the total sand purchase commitments could be as much as $16.3 million.
Schedule of letters of credit The letters of credit are categorized below (in thousands):
March 31, December 31,
2020 2019
Environmental remediation $ 4,477    $ 4,182   
Insurance programs 4,105    4,105   
Rail car commitments 455    455   
Total letters of credit $ 9,037    $ 8,742