Earnings Per Share Reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Income from continuing operations, net of income taxes	$ 5,735	$ 7,171	$ 15,302	$ 39,449
Basic weighted-average common shares outstanding (in shares)	37,807	43,535	39,148	43,515
Assumed exercise of dilutive stock options and restricted stock units	523	284	572	541
Diluted weighted-average common shares outstanding (in shares)	38,330	43,819	39,720	44,056
Income from Continuing Operations:
Basic earnings per share (in dollars per share)	$ 0.15	$ 0.16	$ 0.39	$ 0.91
Diluted earnings per share (in dollars per share)	$ 0.15	$ 0.16	$ 0.39	$ 0.90

Earnings Per Share Reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted EPS (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified

3 Months Ended

9 Months Ended

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2012

Sep. 30, 2011

Earnings Per Share [Abstract]

Income from continuing operations, net of income taxes

$ 5,735

$ 7,171

$ 15,302

$ 39,449

Basic weighted-average common shares outstanding (in shares)

37,807

43,535

39,148

43,515

Assumed exercise of dilutive stock options and restricted stock units

523

284

572

541

Diluted weighted-average common shares outstanding (in shares)

38,330

43,819

39,720

44,056

Income from Continuing Operations:

Basic earnings per share (in dollars per share)

$ 0.15

$ 0.16

$ 0.39

$ 0.91

Diluted earnings per share (in dollars per share)

$ 0.15

$ 0.16

$ 0.39

$ 0.90

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

+ References+ Details

- Definition

The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.23)

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-Publisher SEC

-Name Regulation S-X (SX)

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 21

-Article 9

+ Details

- Definition

The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 21

-Article 9

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

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-Paragraph 2

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-Paragraph 11, 12, 36, 37, 38

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-Topic 260

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-Name Regulation S-X (SX)

-Number 210

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 20

-Article 5

+ Details

- Definition

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

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

+ Details