Represents debt conversion converted instrument shares issued for basis principal.

No definition available.

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- Definition

Represents debt conversion principal amount of senior notes as basis for conversion rate.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Convertible Security

-URI http://asc.fasb.org/extlink&oid=6509036

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13)

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a),16(a)(1))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph 2, 3

-Article 9

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Note 9 - Financing Arrangements and Fair Value of Financial Instruments (Details Textual) - USD ($)		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Eurodollar [Member] \| Credit Agreement [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		0.75%
Eurodollar [Member] \| Credit Agreement [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
Eurodollar [Member] \| Credit Agreement [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%	1.00%
London Interbank Offered Rate (LIBOR) [Member] \| Credit Agreement [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
London Interbank Offered Rate (LIBOR) [Member] \| Credit Agreement [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate		2.75%
London Interbank Offered Rate (LIBOR) [Member] \| Credit Agreement [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Federal Funds Rate [Member] \| Credit Agreement [Member]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 200,000,000
Credit Agreement [Member] \| Foreign Operations [Member]
Short-term Debt	$ 5,900,000	$ 5,900,000
Letters of Credit Outstanding, Amount	8,500,000	8,500,000
Credit Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity	200,000,000	$ 200,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.375%
Line of Credit Facility, Remaining Borrowing Capacity	166,600,000	$ 166,600,000
Letters of Credit Outstanding, Amount	15,200,000	15,200,000
Revolving Credit Facility [Member] \| Minimum [Member]
Line of Credit Facility, Maximum Borrowing Capacity	200,000,000	200,000,000
Revolving Credit Facility [Member] \| Maximum [Member]
Line of Credit Facility, Maximum Borrowing Capacity	325,000,000	325,000,000
Revolving Credit Facility [Member]
Long-term Line of Credit	0	0
Senior Notes [Member]
Debt Instrument, Face Amount	$ 172,500,000	$ 172,500,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%
Debt Conversion Converted Instrument Shares Issued for Basis Principal		90.8893
Debt Conversion Principal Amount of Senior Notes as Basis for Conversion Rate		$ 1,000
Debt Instrument, Convertible, Conversion Price	$ 11	$ 11
Convertible Debt, Fair Value Disclosures	$ 164,700,000	$ 164,700,000		$ 192,300,000
Foreign Operations [Member]
Short-term Debt	5,900,000	5,900,000
Prepaid Expenses and Other Current Assets [Member]
Restricted Cash and Cash Equivalents, Current	15,500,000	15,500,000
Short-term Debt	$ 5,913,000	$ 5,913,000		$ 11,648,000