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Commitments and Contingencies
 12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
Note 10. Commitments and Contingencies
Credit Facilities and Commitments
We have a $230,000 unsecured revolving credit facility which expires December 31, 2016. The facility includes a $45,000 letter of credit subfacility. At December 31, 2014 and 2013, there were undrawn letters of credit outstanding under this facility with a face amount of $37,315 and $34,415, respectively, and there were loans outstanding under this facility of $90,000 and $0, respectively. We have the right to prepay this debt and intend to repay this amount using cash within the next twelve months; therefore, we have classified the debt as a current liability. Loans under the facility are subject to certain financial covenants, and we are currently in compliance with these covenants.
Loans under the facility, other than swingline loans, bear interest at a rate per annum equal to, at our election, either (i) LIBOR for an interest period of one month, reset daily, plus 0.875%, or (ii) LIBOR for an interest period of one, two, three, six or twelve months as selected by us, reset at the end of the selected interest period, plus 0.875%. The outstanding loan amount at December 31, 2014 bears interest at a rate per annum equal to option (i) noted above. Given the LIBOR rate at December 31, 2014, our effective per annum interest rate at year end was approximately 1.1%. Swingline loans bear interest at a rate per annum equal to LIBOR for an interest period of one month, reset daily, plus 0.875%. We pay a commitment fee for the unused portion of the facility of 0.10% per annum if the average quarterly utilization of the facility is 20% or more, or 0.125% per annum if the average quarterly utilization of the facility is less than 20%. For each letter of credit issued under the facility, we pay a commission fee on the amount available to be drawn under such letter of credit equal to 0.875% per annum and, subject to certain exceptions, an issuance fee equal to 0.075% of the face amount of such letter of credit.
Legal Contingencies
We are involved in certain legal actions. The outcomes of these legal actions are not within our complete control and may not be known for prolonged periods of time. In some actions, the claimants seek damages, as well as other relief, that could require significant expenditures or result in lost revenues. We record a liability for these legal actions when a loss is known or considered probable and the amount can be reasonably estimated. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate than any other, the minimum amount of the range is accrued. If a loss is reasonably possible but not known or probable, and can be reasonably estimated, the estimated loss or range of loss is disclosed. In most cases, significant judgment is required to estimate the amount and timing of a loss to be recorded. As of December 31, 2014, there were no litigation matters that we consider to be probable or reasonably possible to have a material adverse outcome.