NOTES PAYABLE TO BANKS

The Company has a revolving credit facility with Banc of America Securities, LLC, SunTrust Robinson Humphrey, Inc., and Regions Capital Markets as Joint Lead Arrangers and Joint Book Managers, and a syndicate of four other lenders. The facility has a general term of five years ending January 17, 2019 and provides for a line of credit of up to $125 million, including a $50 million letter of credit subfacility, and a $35 million swingline subfacility. The revolving credit facility contains customary terms and conditions, including restrictions on indebtedness, dividend payments, business combinations and other related items. The revolving credit facility includes a full and unconditional guarantee by the Company's 100 percent owned domestic subsidiaries whose assets equal substantially all of the consolidated assets of the Company and its subsidiaries. Certain of the Company’s minor subsidiaries are not guarantors.

On June 30, 2016, the Company amended the revolving credit facility to (1) establish a borrowing base to be the lesser of (a) $125 million or (b) the difference between (i) a specified percentage (ranging from 70% to 80%) of eligible accounts receivable less (ii) the amount of any outstanding letters of credit, (2) secure payment obligations under the credit facility with a security interest in the consolidated accounts receivable, and (3) replace the financial covenants related to minimum leverage and debt service coverage ratios with a covenant to maintain a minimum tangible net worth of not less than $700 million. As of March 31, 2018, the Company was in compliance with this covenant.

Revolving loans under the amended revolving credit facility bear interest at one of the following two rates at the Company’s election:

the Base Rate, which is a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus 0.50%, (b) Bank of America’s publicly announced “prime rate,” and (c) the Eurodollar Rate plus 1.00%; in each case plus a margin that ranges from 0.125% to 1.125% based on a quarterly consolidated leverage ratio calculation; or

the Eurodollar Rate, which is the rate per annum equal to the London Interbank Offering Rate (“LIBOR”) plus, a margin ranging from 1.125% to 2.125%, based upon a quarterly debt covenant calculation.

In addition, the Company pays an annual fee ranging from 0.225% to 0.325%, based on a quarterly consolidated leverage ratio calculation, on the unused portion of the credit facility.

The Company has incurred loan origination fees and other debt related costs associated with the revolving credit facility in the aggregate of approximately $3.0 million. These costs, net of amounts written off as a result of a reduction in the size of the revolving credit facility in 2015, are being amortized to interest expense over the remaining term of the five-year loan, and the remaining net balance of $0.1 million at March 31, 2018 is classified as part of non-current other assets.

All letters of credit are currently issued under RPC’s $125 million credit facility. As of March 31, 2018, RPC had no outstanding borrowings under the revolving credit facility, and letters of credit outstanding relating to self-insurance programs and contract bids totaled $19.6 million; therefore, a total of $105.4 million of the facility was available.

Interest incurred, which includes facility fees on the unused portion of the revolving credit facility and the amortization of loan costs, was as follows:

Three months ended

March 31

(in thousands except interest rate data)

2018

2017

Interest incurred

103