Note 7 - Financing Arrangements and Fair Value of Financial Instruments	3 Months Ended
Mar. 31, 2015
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 7 – Financing Arrangements and Fair Value of Financial Instruments Our financing arrangements include $172.5 million of unsecured convertible senior notes (“Senior Notes”) and a $200.0 million revolving credit facility which can be increased to a maximum capacity of $325.0 million. At March 31, 2015, we had no outstanding borrowings under the revolving credit facility. Additionally, our foreign operations had $9.9 million outstanding under lines of credit and other borrowings. The Senior Notes bear interest at a rate of 4.0% per year, payable semi-annually in arrears on April 1 and October 1 of each year. Holders may convert the Senior Notes at their option at any time prior to the close of business on the business day immediately preceding the October 1, 2017 maturity date. The conversion rate is initially 90.8893 shares of our common stock per $1,000 principal amount of Senior Notes (equivalent to an initial conversion price of $11.00 per share of common stock), subject to adjustment in certain circumstances. Upon conversion, the Senior Notes will be settled in shares of our common stock. In 2015, holders converted an insignificant amount of Senior Notes into shares of our common stock. We may not redeem the Senior Notes prior to their maturity date. In March 2015, we entered into a Third Amended and Restated Credit Agreement (the "Credit Agreement") which provides for a $200 million revolving loan facility available for borrowings and letters of credit and expires in March 2020. The Credit Agreement has a springing maturity date that will accelerate the maturity of the credit facility to June 2017 if the Senior Notes have not either been repurchased, redeemed, converted and/or refinanced in full or the Company has not provided sufficient funds to an escrow agent to repay the Senior Notes in full on their maturity date. Under the terms of the Credit Agreement, we can elect to borrow at a variable interest rate either based on LIBOR plus a margin based on our consolidated leverage ratio, ranging from 175 to 275 basis points, or at a variable interest rate based on the greatest of: (a) prime rate, (b) the federal funds rate in effect plus 50 basis points, or (c) the Eurodollar rate for a Eurodollar Loan with a one-month interest period plus 100 basis points, in each case plus a margin ranging from 75 to 175 basis points based on our consolidated leverage ratio. The applicable margins on LIBOR borrowings and Eurodollar borrowings on March 31, 2015 were 100 and 200 basis points, respectively. In addition, we are required to pay a commitment fee on the unused portion of the Credit Agreement of 37.5 basis points. The Credit Agreement contains customary financial and operating covenants, including a consolidated leverage ratio, a senior secured leverage ratio and an interest coverage ratio. The Credit Agreement also limits the payment of dividends on our common stock, the repurchase of our common stock and the conversion, redemption, defeasance or refinancing of the Senior Notes. We were in compliance with these covenants as of March 31, 2015. The Credit Agreement is a senior secured obligation, secured by first liens on all of our U.S. tangible and intangible assets. Additionally, the Credit Agreement is guaranteed by certain of our U.S. subsidiaries and a portion of the capital stock of our non-U.S. subsidiaries has also been pledged as collateral. Our financial instruments include cash and cash equivalents, receivables, payables and debt. We believe the carrying values of these instruments, with the exception of our Senior Notes, approximated their fair values at March 31, 2015 and December 31, 2014. The estimated fair value of our Senior Notes was $196.2 million at March 31, 2015 and $192.3 million at December 31, 2014, based on quoted market prices at these respective dates.

Note 7 – Financing Arrangements and Fair Value of Financial Instruments

Our financing arrangements include $172.5 million of unsecured convertible senior notes (“Senior Notes”) and a $200.0 million revolving credit facility which can be increased to a maximum capacity of $325.0 million. At March 31, 2015, we had no outstanding borrowings under the revolving credit facility. Additionally, our foreign operations had $9.9 million outstanding under lines of credit and other borrowings. The Senior Notes bear interest at a rate of 4.0% per year, payable semi-annually in arrears on April 1 and October 1 of each year. Holders may convert the Senior Notes at their option at any time prior to the close of business on the business day immediately preceding the October 1, 2017 maturity date. The conversion rate is initially 90.8893 shares of our common stock per $1,000 principal amount of Senior Notes (equivalent to an initial conversion price of $11.00 per share of common stock), subject to adjustment in certain circumstances. Upon conversion, the Senior Notes will be settled in shares of our common stock. In 2015, holders converted an insignificant amount of Senior Notes into shares of our common stock. We may not redeem the Senior Notes prior to their maturity date.

In March 2015, we entered into a Third Amended and Restated Credit Agreement (the "Credit Agreement") which provides for a $200 million revolving loan facility available for borrowings and letters of credit and expires in March 2020. The Credit Agreement has a springing maturity date that will accelerate the maturity of the credit facility to June 2017 if the Senior Notes have not either been repurchased, redeemed, converted and/or refinanced in full or the Company has not provided sufficient funds to an escrow agent to repay the Senior Notes in full on their maturity date. Under the terms of the Credit Agreement, we can elect to borrow at a variable interest rate either based on LIBOR plus a margin based on our consolidated leverage ratio, ranging from 175 to 275 basis points, or at a variable interest rate based on the greatest of: (a) prime rate, (b) the federal funds rate in effect plus 50 basis points, or (c) the Eurodollar rate for a Eurodollar Loan with a one-month interest period plus 100 basis points, in each case plus a margin ranging from 75 to 175 basis points based on our consolidated leverage ratio. The applicable margins on LIBOR borrowings and Eurodollar borrowings on March 31, 2015 were 100 and 200 basis points, respectively. In addition, we are required to pay a commitment fee on the unused portion of the Credit Agreement of 37.5 basis points. The Credit Agreement contains customary financial and operating covenants, including a consolidated leverage ratio, a senior secured leverage ratio and an interest coverage ratio. The Credit Agreement also limits the payment of dividends on our common stock, the repurchase of our common stock and the conversion, redemption, defeasance or refinancing of the Senior Notes. We were in compliance with these covenants as of March 31, 2015.

The Credit Agreement is a senior secured obligation, secured by first liens on all of our U.S. tangible and intangible assets. Additionally, the Credit Agreement is guaranteed by certain of our U.S. subsidiaries and a portion of the capital stock of our non-U.S. subsidiaries has also been pledged as collateral.

Our financial instruments include cash and cash equivalents, receivables, payables and debt. We believe the carrying values of these instruments, with the exception of our Senior Notes, approximated their fair values at March 31, 2015 and December 31, 2014. The estimated fair value of our Senior Notes was $196.2 million at March 31, 2015 and $192.3 million at December 31, 2014, based on quoted market prices at these respective dates.