Debt and Financial Instruments	3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]
Debt and Financial Instruments	Debt and Financial Instruments We have a credit agreement with a bank which provides for a revolving credit facility up to a maximum principal amount of $100 million expiring on December 31, 2021 and for a term loan in the principal amount of $40 million maturing on April 30, 2020 (the "Credit Agreement"). The Credit Agreement is secured by substantially all of our assets. The maximum interest rate on the Credit Agreement is the daily one-month LIBOR market index rate (for borrowings in Dollars and Sterling) or the daily one month EURIBOR (for borrowings in Euros) plus 2.50%. Based on our financial performance, the interest rate can be reduced to a minimum rate of the daily one-month LIBOR market index rate plus 1.25%, with the rate being determined based on our maximum leverage ratio for the preceding four quarters. Each unpaid advance on the revolving loan will bear interest until repaid. The term loan is payable in monthly installments of principal in the amount of $1.0 million plus applicable interest, beginning on January 1, 2017. We may prepay the term loan or the revolving loan, in whole or in part, at any time without premium or penalty, subject to certain conditions. Amounts repaid or prepaid on the term loan may not be reborrowed. The Credit Agreement contains customary affirmative and negative covenants, including covenants that limit or restrict our and our subsidiaries’ (subject to certain exceptions) ability to, among other things, grant liens, make investments, incur indebtedness, merge or consolidate, dispose of assets or make acquisitions. We are also required to maintain compliance with a minimum fixed charge coverage ratio and a maximum leverage ratio. We were in compliance with all of the financial covenants under the Credit Agreement as of March 31, 2018. As of March 31, 2018, our total long-term debt outstanding under the term loan was $25.0 million. In addition, there were $43.7 million of borrowings outstanding and $50.3 million of available borrowings under the Credit Agreement. For the three months ended March 31, 2018, the weighted average interest rate on our borrowings was 3.4%. In March 2017, we entered into an interest rate swap agreement which effectively fixed our interest rate on the remaining $37 million outstanding on our term loan to a fixed LIBOR of 1.59% plus the applicable margin under the Credit Agreement. We have designated the interest rate swap, which expires on April 1, 2020, as a cash flow hedge and have applied hedge accounting. The fair value of the derivative asset associated with the interest rate swap was $0.2 million and $0.1 million as of March 31, 2018 and December 31, 2017, respectively, and is included in other assets on the condensed consolidated balance sheet. The derivative asset is classified within Level 2 of the fair value hierarchy in which fair value is measured using quoted prices in active markets for similar assets and liabilities. In April 2017, we entered into an interest rate cap agreement and paid a premium of $0.5 million which caps the daily one-month LIBOR at 2.0% for an aggregate notional amount of $20.0 million of our variable rate debt under our credit facility. The interest rate cap agreement matures on December 31, 2021. We have designated the interest rate cap as a cash flow hedge and have applied hedge accounting. The fair value of the derivative asset associated with the interest rate cap was $0.5 million and $0.3 million as of March 31, 2018 and December 31, 2017, respectively, and is included in other assets on the condensed consolidated balance sheet. The derivative asset is classified within Level 2 of the fair value hierarchy in which fair value is measured using quoted prices in active markets for similar assets and liabilities.

Debt and Financial Instruments

We have a credit agreement with a bank which provides for a revolving credit facility up to a maximum principal amount of $100 million expiring on December 31, 2021 and for a term loan in the principal amount of $40 million maturing on April 30, 2020 (the "Credit Agreement"). The Credit Agreement is secured by substantially all of our assets.

The maximum interest rate on the Credit Agreement is the daily one-month LIBOR market index rate (for borrowings in Dollars and Sterling) or the daily one month EURIBOR (for borrowings in Euros) plus 2.50%. Based on our financial performance, the interest rate can be reduced to a minimum rate of the daily one-month LIBOR market index rate plus 1.25%, with the rate being determined based on our maximum leverage ratio for the preceding four quarters. Each unpaid advance on the revolving loan will bear interest until repaid. The term loan is payable in monthly installments of principal in the amount of $1.0 million plus applicable interest, beginning on January 1, 2017. We may prepay the term loan or the revolving loan, in whole or in part, at any time without premium or penalty, subject to certain conditions. Amounts repaid or prepaid on the term loan may not be reborrowed.

The Credit Agreement contains customary affirmative and negative covenants, including covenants that limit or restrict our and our subsidiaries’ (subject to certain exceptions) ability to, among other things, grant liens, make investments, incur indebtedness, merge or consolidate, dispose of assets or make acquisitions. We are also required to maintain compliance with a minimum fixed charge coverage ratio and a maximum leverage ratio. We were in compliance with all of the financial covenants under the Credit Agreement as of March 31, 2018. As of March 31, 2018, our total long-term debt outstanding under the term loan was $25.0 million. In addition, there were $43.7 million of borrowings outstanding and $50.3 million of available borrowings under the Credit Agreement. For the three months ended March 31, 2018, the weighted average interest rate on our borrowings was 3.4%.

In March 2017, we entered into an interest rate swap agreement which effectively fixed our interest rate on the remaining $37 million outstanding on our term loan to a fixed LIBOR of 1.59% plus the applicable margin under the Credit Agreement. We have designated the interest rate swap, which expires on April 1, 2020, as a cash flow hedge and have applied hedge accounting. The fair value of the derivative asset associated with the interest rate swap was $0.2 million and $0.1 million as of March 31, 2018 and December 31, 2017, respectively, and is included in other assets on the condensed consolidated balance sheet. The derivative asset is classified within Level 2 of the fair value hierarchy in which fair value is measured using quoted prices in active markets for similar assets and liabilities.

In April 2017, we entered into an interest rate cap agreement and paid a premium of $0.5 million which caps the daily one-month LIBOR at 2.0% for an aggregate notional amount of $20.0 million of our variable rate debt under our credit facility. The interest rate cap agreement matures on December 31, 2021. We have designated the interest rate cap as a cash flow hedge and have applied hedge accounting. The fair value of the derivative asset associated with the interest rate cap was $0.5 million and $0.3 million as of March 31, 2018 and December 31, 2017, respectively, and is included in other assets on the condensed consolidated balance sheet. The derivative asset is classified within Level 2 of the fair value hierarchy in which fair value is measured using quoted prices in active markets for similar assets and liabilities.