The number of shares issuable under a share-based award plan pertaining to dividend payments related to previous award grants during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

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Number of shares (or share units) exercised and issued during the current period.

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Number of shares (or share units) exercised and issued during the current period.

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

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- Definition

The decrease in the number of shares that could be issued attributable to the lapse of rights to exercise previously issued equity instruments under the terms of the option agreements under the plan during the reporting period.

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- Definition

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

+ References

+ Details

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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).

+ References

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- Definition

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.

+ 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(2)(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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ Details

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The decrease in the number of shares that could be issued attributable to the lapse of rights to exercise previously issued stock options under the terms of the option agreements under the plan during the reporting period.

+ References

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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 Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(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.

Reference 3: 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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: 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)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

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Share-Based Compensation (Summarized Share-Based Compensation Activity) (Details)	3 Months Ended	6 Months Ended				3 Months Ended		6 Months Ended					6 Months Ended				6 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Mar. 31, 2011	Mar. 31, 2010	Jun. 30, 2011 Restricted Shares [Member]	Jun. 30, 2010 Restricted Shares [Member]	Jun. 30, 2011 Restricted Shares [Member]	Jun. 30, 2010 Restricted Shares [Member]	Jun. 30, 2010 Restricted Stock Units (RSUs) [Member]	Mar. 31, 2010 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2009 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2011 Performance Shares [Member]	Jun. 30, 2010 Performance Shares [Member]	Mar. 31, 2011 Performance Shares [Member]	Mar. 31, 2010 Performance Shares [Member]	Jun. 30, 2011 Management Performance Shares [Member]	Jun. 30, 2010 Management Performance Shares [Member]	Mar. 31, 2011 Management Performance Shares [Member]	Mar. 31, 2010 Management Performance Shares [Member]	Jun. 30, 2011 Director RSU's [Member]	Jun. 30, 2010 Director RSU's [Member]	Jun. 30, 2011 Director RSU's [Member]	Jun. 30, 2010 Director RSU's [Member]
Outstanding at beginning of year		351,500	417,500	100,500	351,500
Exercised	(75,000)	(75,000)	(66,000)
Expired	(25,000)	(276,000)
Outstanding at period end	500	500	351,500	100,500	351,500
Exercisable at period end	500	500	351,500
Outstanding at beginning of year						286,737	219,782	219,391	218,197	3,311	3,311	3,311	278,334	237,704	296,591	307,985	104,124	84,241	111,298	110,706	16,528	20,944	16,320	20,712
Granted							29,591	67,346	34,176				85,093	161,534			49,510	37,480				15,752		15,752
Dividends																					624	683	1,362	1,154
Exercised						(2,500)		(2,500)	(3,000)					(91,253)			(7,911)
Exercised and issued																					(2,066)	(2,618)	(2,066)	(2,618)
Exercised and deferred																					(15,086)	(18,817)	(15,616)	(19,056)
Expired													(66,836)				31,081
Forfeited							(272)		(272)								(3,344)	(11,015)
Outstanding at period end						284,237	249,101	284,237	249,101	3,311	3,311	3,311	296,591	307,985	296,591	307,985	111,298	110,706	111,298	110,706		15,944		15,944