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Debt | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Debt | Debt The Company has revolving lines of credit with various banks in the United States and Europe. Total available credit at December 31, 2017 was $304.2 million including revolving credit lines and an irrevocable standby letter of credit in support of various insurance deductibles. The Company’s primary credit facility is a revolving line of credit with $300.0 million in available credit, which expires on July 23, 2021. Amounts borrowed under this credit facility will 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 United States dollars appearing on Reuters LIBOR1screen page (the “LIBOR Rate”), adjusted for any reserve requirement in effect, plus a spread of 0.60% to 1.45%, determined quarterly based on the Company’s leverage ratio (at December 31, 2017, the LIBOR Rate was 1.49%, or (b) a base rate, plus a spread of 0.00% to 0.45%, determined quarterly based on the Company’s leverage ratio. 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 applicable spread described above, and will pay market-based fees for commercial letters of credit. The Company is required to pay an annual facility fee of 0.15% to 0.30% of 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. In addition to the $300.0 million credit facility, the Company’s borrowing capacity under other revolving credit lines totaled $4.0 million at December 31, 2017. The other revolving credit lines charge interest ranging from 0.47% to 8.50% and have maturity dates from March 2017 to December 2018. The Company had no outstanding balance on any of its revolving credit lines at December 31, 2017 and 2016, respectively. 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, 2017. 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, 2017, 2016 and 2015, consisted of the following:
| Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Interest costs incurred | $ | 1,249 |  |  | $ | 1,167 |  |  | $ | 1,133 |
Less: Interest capitalized | (72 | ) |  | (20 | ) |  | (136 | )
Interest expense | $ | 1,177 |  |  | $ | 1,147 |  |  | $ | 997 |
Capital Lease Obligations The Company entered into two four-year lease agreements for certain office equipment with Cisco Systems Capital Corporation for a total of approximately $4.4 million, which was recorded in fixed assets as capital lease obligations. These capital lease obligations are included in current liabilities and other long-term liabilities in the accompanying condensed consolidated balance sheets. The interest rates for these two capital leases are 2.89% and 3.50%, respectively, and the two leases will mature in May 2021 and July 2021, respectively. As of December 31, 2017, the current portion of the outstanding liability for the leased equipment was approximately $1.1 million and the long-term portion was approximately $2.6 million.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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