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Commitments, Contingencies and Guarantees | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Commitments, Contingencies and Guarantees | COMMITMENTS, CONTINGENCIES AND GUARANTEES Leases The majority of our facilities are occupied under operating lease arrangements with various expiration dates through 2067. We are responsible for the real estate taxes and operating expenses related to these facilities. Additionally, we enter into operating leases for certain vehicles and office equipment in the normal course of business. We determine the expected term of any executed agreements using the non-cancelable lease term plus any renewal options by which the failure to renew imposes a penalty in such amount that renewal is reasonably assured. The derived expected term is then used in the determination of a capital or operating lease and in the calculation of straight-line rent expense. Rent escalations are considered in the calculation of minimum lease payments in our capital lease tests and in determining straight-line rent expense for operating leases. Commitments Rent expense charged to operations under operating leases was approximately $25.2 million, $23.0 million, and $22.7 million for the years ended December 31, 2018, 2017 and 2016, respectively. Minimum annual rental payments under these agreements are estimated as follows (in thousands):
Years Ending December 31, |  | Amount
﻿ |  |  |
2019 |  | $ | 19,351 |
2020 |  | 17,109 |
2021 |  | 14,528 |
2022 |  | 10,799 |
2023 |  | 8,518 |
Thereafter |  | 36,514 |
﻿ |  | $ | 106,819 |
We have various minimum royalty payments due through 2035 of $2.1 million. If these obligations are not satisfied, the related license arrangements may be terminated, resulting in either a loss in exclusivity or the right to use the technology. We are required to annually purchase a minimum amount of inventory from certain suppliers. Through 2025, we have a total of $8.4 million in minimum purchase commitments under these arrangements. Contingencies Although we are not currently party to any material contingencies of which we are aware or have recorded a reserve for, we are subject to claims that may arise in the ordinary course of business, including with respect to actual and threatened litigation and other matters. We accrue for loss contingencies when it is probable that future expenditures will be made, and such expenditures can be reasonably estimated. However, our actual losses with respect to these contingencies could exceed our accruals. Under our current employee healthcare insurance policy for U.S. employees, we retain claims liability risk per incident up to $1 million per year in 2018, $1 million per year in 2017, and $0.45 million per year in 2016. We recognized U.S. employee healthcare claim expense of $52.7 million for the year ended December 31, 2018, $47.2 million for the year ended December 31, 2017 and $40.4 million during the year ended December 31, 2016, which represents actual claims paid and an estimate of our liability for the uninsured portion of employee healthcare obligations that have been incurred but not paid. Should employee health insurance claims exceed our estimated liability, we would have further obligations. Our estimated liability for healthcare claims that have been incurred but not paid as of December 31, 2018 and 2017, was $4.8 million and $4.2 million, respectively. Under our workers’ compensation insurance policies for U.S. employees, we have retained the first $0.3 million for the years ended December 31, 2018, 2017 and 2016, in claim liability per incident with aggregate maximum claim liabilities per year of $2.5 million, $2.5 million, and $2.6 million for the years ended December 31, 2018, 2017 and 2016, respectively. Workers’ compensation expense recognized during the years ended December 31, 2018, 2017 and 2016 and our respective liability for such claims as of December 31, 2018, 2017 and 2016 was not material. Claims incurred during the years ended December 31, 2018 and 2017 are relatively undeveloped as of December 31, 2018. Therefore, it is possible that we could incur additional healthcare and wage indemnification costs beyond those previously recognized up to our aggregate liability for each of the respective claim years. For the years ended on or prior to December 31, 2016, based on our retained claim liability per incident and our aggregate claim liability per year, our maximum liability in excess of the amounts deemed probable and previously recognized is not material as of December 31, 2018. As of December 31, 2018, we had outstanding letters of credit totaling $1.3 million to the insurance companies as security for the claims in connection with these policies. We have entered into an employment agreement with our chief executive officer whereby payment may be required if we terminate his employment without cause other than following a change in control. The amount payable is based upon the executive’s salary at the time of termination and the cost to us of continuing to provide certain benefits. Had this officer been terminated without cause at December 31, 2018, other than following a change in control, we would have had an obligation for salaries and benefits of approximately $1.6 million under such agreement. In addition, the agreement provides for continued vesting of his outstanding equity awards for a period of two years. We have entered into employment agreements with each of our officers that require us to make certain payments in the event the officer’s employment is terminated under certain circumstances within a certain period following a change in control. The amount payable by us under each of these agreements is based on the officer’s salary and bonus history at the time of termination and the cost to us of continuing to provide certain benefits. Had all of our officers been terminated in qualifying terminations following a change in control at December 31, 2018, we would have had aggregate obligations of approximately $31.9 million under these agreements. These agreements also provide for the acceleration of the vesting of all stock options and restricted stock units upon any qualifying termination following a change in control. At this time, we believe the likelihood of terminations as a result of the scenarios described is remote, and therefore, we have not accrued for such loss contingencies. We have total acquisition-related contingent consideration liabilities outstanding of $3.5 million, primarily related to the achievement of certain revenue milestones, recorded at December 31, 2018, and $3.0 million recorded at December 31, 2017. From time to time, we have received notices alleging that our products infringe third-party proprietary rights, although we are not aware of any pending litigation with respect to such claims. Patent litigation frequently is complex and expensive, and the outcome of patent litigation can be difficult to predict. There can be no assurance that we will prevail in any infringement proceedings that may be commenced against us. If we lose any such litigation, we may be stopped from selling certain products and/or we may be required to pay damages as a result of the litigation. Guarantees We enter into agreements with third parties in the ordinary course of business under which we are obligated to indemnify such third parties for and against various risks and losses. The precise terms of such indemnities vary with the nature of the agreement. In many cases, we limit the maximum amount of our indemnification obligations, but in some cases those obligations may be theoretically unlimited. We have not incurred material expenses in discharging any of these indemnification obligations, and based on our analysis of the nature of the risks involved, we believe that the fair value of potential indemnification under these agreements is minimal. Accordingly, we have recorded no liabilities for these obligations at December 31, 2018 and 2017. When acquiring a business, we sometimes assume liability for certain events or occurrences that took place prior to the date of acquisition. As of December 31, 2018 and 2017, we do not have any material pre-acquisition liabilities recorded.

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