Adjustments to Net Income for the Purposes of Computing Income Available to Common Stockholders

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- Definition

Maximum Range of Target Award for performance share awards under the long-term Relative Measure Program

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- Definition

Minimum Range of Target Award for performance share awards under the long-term Relative Measure Program

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- Definition

Trading Days Used To Compute Average Closing Price of Stock for Dilutive Effect Comparison

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No definition available.

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 13, 14

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

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- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ 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)

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-Publisher FASB

-Name FASB Staff Position (FSP)

-Number APB14-1

-Paragraph 31

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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- Definition

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

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- Definition

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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

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- Definition

Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

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-Name Accounting Standards Codification

-Topic 718

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

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Net Income Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended						1 Months Ended		6 Months Ended
	Feb. 29, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Convertible Debt [Member] 3.75% Convertible Notes [Member]	Apr. 05, 2011 Convertible Debt [Member] 3.75% Convertible Notes [Member]	Jun. 30, 2012 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Dec. 31, 2011 Convertible Debt [Member] 3.375% Convertible Notes [Member]	Feb. 29, 2012 Restricted Stock Units (RSUs) [Member]	Feb. 29, 2012 Performance Share Awards [Member]	Jun. 30, 2012 Performance Share Awards [Member]
Net Income Per Common Share
Weighted Average Number Diluted Shares Outstanding Adjustment		607,708	874,100	628,826	881,019
Adjustments to income from continuing operations and net income for the purposes of computing income available to common stockholders		$ 0	$ 0	$ 0	$ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		320,313	702,958	313,713	923,821
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	101,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period										161,204	103,160
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period												3 years
Minimum Range of Target Award of Stock Plan												0.00%
Maximum Range of Target Award of Stock Plan												250.00%
Convertible notes stated interest rate						3.75%		3.375%
Debt Instrument, Convertible, Conversion Price								$ 28.31
Trading Days Used To Compute Average Closing Price of Stock for Dilutive Effect Comparison				30 days
Debt instrument, carrying amount							$ 92,500	$ 55,636	$ 55,636