The total expense related to cash settled performance share units.

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The number of nonvested shares under options that were granted during the reporting period as specified in contractual agreements pertaining to the stock option plan.

+ References

No definition available.

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The number of nonvested shares under options that were vested during the reporting period as specified in contractual agreements pertaining to the stock option plan.

+ References

No definition available.

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- Definition

The number of nonvested shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

No definition available.

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- Definition

The number of nonvested stock options that are outstanding as of the balance sheet date.

+ References

No definition available.

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- Definition

The weighted average fair value of nonvested awards on stock option plans.

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No definition available.

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- Definition

Weighted average fair value as of the grant date of stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

No definition available.

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- Definition

The weighted average fair value as of the grant date of the stock (unit) option plans that were granted during the reporting period as specified in contractual agreements pertaining to the stock option plan.

+ References

No definition available.

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+ References

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This element represent the fair value of the option at grant date.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-SubTopic 10

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-Subparagraph (h)(1)(i)

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-Name Staff Accounting Bulletin (SAB)

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-Section F

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-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

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No definition available.

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Period 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, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

+ References

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The weighted average fair value at grant date for nonvested equity-based awards issued 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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Paragraph A240

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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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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(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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-Section 50

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

+ 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 210.5-02.28,29)

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-Name Regulation S-X (SX)

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

-Paragraph 28

-Subparagraph (b)

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-Paragraph A240

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Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The weighted-average fair value per share					$ 2.91
Stock option expense	$ 303		$ 254	$ 619	$ 499
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)	2,259,273	2,289,873		2,289,873
Exercised (in shares)	(9,600)	(13,750)
Forfeited or expired (in shares)	(43,934)	(16,850)
Outstanding, ending balance (in shares)	2,205,739	2,259,273		2,205,739
Exercisable Balance (in shares)	1,187,489			1,187,489
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)	$ 6.65	$ 6.67		$ 6.67
Exercised (in dollars per share)	$ 5.77	$ 4.84
Forfeited or expired (in dollars per share)	$ 25.62	$ 10.08
Outstanding, ending balance (in dollars per share)	$ 6.28	$ 6.65		$ 6.28
Exercisable Balance (in dollars per share)	$ 7.01			$ 7.01
Aggregate intrinsic value exercised	17			50
Aggregate intrinsic value outstanding	8,181			8,181
Aggregate intrinsic value exercisable	4,126			4,126
Share-based Compensation Arrangement by Share-based Payment Award, Nonvested Options, Outstanding [Roll Forward]
Nonvested, beginning balance (in shares)	1,137,000	1,167,751		1,167,751
Granted (in shares)	0
Vested during period (in shares)	(118,750)	(25,001)
Forfeited (in shares)		(5,750)
Nonvested, ending balance (in shares)	1,018,250	1,137,000		1,018,250
Share-based Compensation Arrangement by Share-based Payment Award, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning balance (in dollars per share)	$ 2.89	$ 2.89		$ 2.89
Granted (in dollars per share)	$ 0
Vested during period (in dollars per share)	$ 2.14	$ 2.69
Forfeited (in dollars per share)		$ 2.96
Nonvested, ending balance (in dollars per share)	$ 2.98	$ 2.89		$ 2.98
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense	134		148	175	202
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	29,450	58,899		58,899
Granted (in shares)	41,727
Vested during period (in shares)	0	(29,449)
Forfeited (in shares)		0
Nonvested, ending balance (in shares)	71,177	29,450		71,177
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning balance (in per dollars share)	$ 5.54	$ 5.54		$ 5.54
Granted (in dollars per share)	$ 6.71
Vested during period (in dollars per share)	$ 0	$ 5.54
Forfeited (in dollars per share)		$ 0
Nonvested, ending balance (in dollars per share)	$ 6.23	$ 5.54		$ 6.23
Performance share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share unit expense	424		0	400	0
Performance period				3 years
Unvested [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost related to unvested share-based awards not yet recognized	2,307			2,307
Weighted average vesting period				2 years 3 months 18 days
Unvested [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost related to unvested share-based awards not yet recognized	$ 282			$ 282
Weighted average vesting period				4 months 24 days