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Debt | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Debt | Debt In May 2020, the Company entered into a third amendment to the unsecured credit agreement dated July 27, 2012 with Wells Fargo Bank, National Association, and certain other institutional lenders that provides for a $300.0 million unsecured revolving credit facility (“Credit Facility”). The Amendment extends the term of the Credit Agreement from July 23, 2021, to July 23, 2022. The Company is required to pay an annual facility fee of 0.20 to 0.35 percent on the available commitments under the Credit Agreement, regardless of usage, with the applicable fee determined on a quarterly basis based on the Company’s leverage ratio. The fee is included within other expense in the Company's condensed consolidated statement of operations. Amounts borrowed under the Credit Agreement bear interest at an annual rate equal to either, at the Company’s option, (a) the rate for Eurocurrency deposits for the corresponding deposits of U.S. dollars as published by the ICE Benchmark Administration Limited, a United Kingdom company, or a comparable or successor quoting service approved by the Agent (the “LIBOR Rate”), adjusted for any reserve requirement in effect, plus a spread of from 0.80 to 1.65 percent, as determined on a quarterly basis based on the Company’s leverage ratio, or (b) a base rate, plus a spread of 0.20 to 0.65 percent, as determined on a quarterly basis based on the Company’s leverage ratio. In no event shall the LIBOR Rate be less than 0.25 percent. The base rate is defined in a manner such that it will not be less than the LIBOR Rate. The Company will pay fees for standby letters of credit at an annual rate equal to the LIBOR Rate plus the applicable spread described in the preceding clause (a), and will pay market-based fees for commercial letters of credit. The spread applicable to a particular LIBOR Rate loan or base rate loan depends on the consolidated leverage ratio of the Company and its subsidiaries at the time the loan is made. Loans outstanding under the Credit Agreement may be prepaid at any time without penalty except for LIBOR Rate breakage costs and expenses. In March 2020, the Company borrowed $150.0 million from the Credit Facility to increase its cash position and preserve financial flexibility in light of uncertainty resulting from the COVID-19 outbreak; and subsequently paid down the balance in full by December 2020. As of December 31, 2020, no amounts are outstanding under the Credit Facility. As of December 31, 2020, in addition to the Credit Facility, certain of the Company’s domestic subsidiaries are guarantors for a credit agreement between certain of its foreign subsidiaries and institutional lenders. Together, all of its credit facilities provide the Company with a total of $303.8 million in revolving credit lines and an irrevocable standby letter of credit in support of various insurance deductibles. The Company and its subsidiaries are required to comply with various affirmative and negative covenants. The covenants include provisions that would limit the availability of funds as a result of a material adverse change to the Company’s financial position or results of operations. The Company was in compliance with its financial covenants under the loan agreement as of December 31, 2020. The Company incurs interest costs, which include interest, maintenance fees and bank charges. The amount of costs incurred, capitalized, and expensed for the years ended December 31, 2020, 2019 and 2018, consisted of the following:
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Interest costs incurred | $ | 2,796 |  |  | $ | 2,172 |  |  | $ | 1,224 |
Less: Interest capitalized | (512) |  |  | (144) |  |  | (160) |
Interest expense | $ | 2,284 |  |  | $ | 2,028 |  |  | $ | 1,064 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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