Shareholders' Equity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Mar. 06, 2013
Schedule of dividend declare
Dividend Per share		$ 0.05
Record Date	Mar. 18, 2013
Payment Date	Mar. 28, 2013
Record Date One [Member]
Schedule of dividend declare
Dividend Per share	0.025
Record Date	Sep. 15, 2011
Payment Date	Sep. 30, 2011
Payments	363
Record Date Two [Member]
Schedule of dividend declare
Dividend Per share	0.025
Record Date	Dec. 15, 2011
Payment Date	Dec. 30, 2011
Payments	365
Record Date Three [Member]
Schedule of dividend declare
Dividend Per share	0.035
Record Date	Mar. 20, 2012
Payment Date	Mar. 30, 2012
Payments	512
Record Date Four [Member]
Schedule of dividend declare
Dividend Per share	0.035
Record Date	Jun. 15, 2012
Payment Date	Jun. 29, 2012
Payments	512
Record Date Five [Member]
Schedule of dividend declare
Dividend Per share	0.045
Record Date	Sep. 14, 2012
Payment Date	Sep. 28, 2012
Payments	664
Record Date Six [Member]
Schedule of dividend declare
Dividend Per share	0.045
Record Date	Dec. 14, 2012
Payment Date	Dec. 28, 2012
Payments	772

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Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

+ Details

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- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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