v2.4.0.8

Common Stock (Details) (USD $)	6 Months Ended	0 Months Ended	6 Months Ended		6 Months Ended
	Jun. 30, 2014	May 16, 2014 May 2016 Stock Repurchase Plan [Member]	Jun. 30, 2013 May 2016 Stock Repurchase Plan [Member]	May 14, 2004 May 2004 Stock Repurchase Plan [Member]	Jun. 30, 2014 Executive Officer [Member] Class A Nonvoting Common Stock [Member]	Jun. 30, 2013 Executive Officer [Member] Class A Nonvoting Common Stock [Member]
Common Stock [Line Items]
Stocks granted					125,209	217,890
Repurchase program, amount authorized		$ 10,000,000
Repurchase program, shares authorized				350,000
Repurchase program, amount repurchased	1,795,000
Repurchase program, remaining amount authorized			$ 8,200,000

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

Reference 1: 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

Amount of a stock repurchase plan authorized by an entity's Board of Directors.

+ References

No definition available.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.

+ References

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: 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 3: 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=27012166&loc=d3e187085-122770



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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