Debt	6 Months Ended
Debt	Jun. 30, 2020
Debt Disclosure [Abstract]
Debt	Debt 2019 Revolving Facility In October 2019, we entered into a secured credit agreement with Wells Fargo Bank, National Association, and other lenders party thereto. The credit facility provides for a $100.0 million five-year revolving line of credit (the "2019 Revolving Facility"), maturing in October 2024. We use the proceeds of any borrowings under the revolving facility for working capital and other general corporate purposes, subject to the terms and conditions set forth in the credit agreement. We classify amounts outstanding as long-term on our consolidated balance sheets, however, we may make voluntary repayments at any time prior to maturity. In March 2020, we drew down the full amount available under our 2019 Revolving Facility to strengthen our liquidity position as a precautionary measure due to the uncertainty associated with the COVID-19 pandemic and to provide flexibility to pursue strategic priorities, but have since repaid the entire balance drawn as of June 30, 2020. As of December 31, 2019, the outstanding balance Note 9—Debt (continued) on our revolving line of credit was $35.0 million. The entire $100.0 million remains available for use under the credit facility as of June 30, 2020. At our election, loans made under the credit agreement bear interest at 1) a LIBOR rate (the “LIBOR Rate") or 2) a base rate determined by reference to the highest of (a) the United States federal funds rate plus .50%, (a) the Wells Fargo prime rate and (c) a daily rate equal to one-month LIBOR rate plus 1.0% (the “Base Rate"), plus in either case an applicable margin. The margin is dependent upon on our total leverage ratio and varies from 1.25% to 2.00% for LIBOR Rate loans and .25% to 1.00% for Base Rate loans. We also pay a commitment fee, which varies from .20% to .35% per annum on the actual daily unused portions of the 2019 Revolving Facility. Letter of credit fees are payable in respect of outstanding letters of credit at a rate per annum equal to the applicable margin for LIBOR Rate loans. The 2019 Revolving Facility contains certain affirmative and negative covenants including negative covenants that limit or restrict, among other things, liens, indebtedness, investments and acquisitions, mergers and fundamental changes, asset sales, restricted payments, changes in the nature of the business, transactions with affiliates and other matters customarily restricted in such agreements. We must also maintain a minimum fixed charge coverage ratio and a maximum consolidated leverage ratio at the end of each fiscal quarter, as set forth in the credit agreement. At June 30, 2020, we were in compliance with all such covenants. If an event of default shall occur and be continuing under the facility, the commitments may be terminated and the principal amounts outstanding under the 2019 Revolving Facility, together with all accrued unpaid interest and other amounts owing in respect thereof, may be declared immediately due and payable. Senior Credit Facility In October 2014, we entered into a $225.0 million credit agreement with Bank of America, N.A., as an administrative agent, Wells Fargo Bank, National Association, and the other lenders party thereto. The credit agreement provided for 1) a $75.0 million five-year revolving facility (the "Revolving Facility") and 2) a five-year $150.0 million term loan facility ("Term Facility" and, together with the Revolving Facility, the "Senior Credit Facility"). In March 2019, we elected to make a voluntary prepayment of $60.0 million to retire the Term Facility without penalty or additional premium. The Revolving Facility remained available for use until the Senior Credit Facility matured in October 2019, at which point we entered into the 2019 Revolving Facility discussed above. Cash interest expense related to our debt was $0.4 million for the three months ended June 30, 2020 and $0.6 million for each of the six months ended June 30, 2020 and 2019. We did not incur any cash interest expense during the three months ended June 30, 2019.