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Acquisitions of Businesses and Non-Controlling Interests - Unaudited Proforma Net Revenue and Net Income from Continuing Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Acquisitions of Businesses and Non-controlling Interests [Abstract]
Net revenues	$ 275,511us-gaap_BusinessAcquisitionsProFormaRevenue
Net income attributable to common shareholders from continuing operations	$ 19,231us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
Earnings per share:
Basic - net income attributable to common shareholders from continuing operations (in dollars per share)	$ 1.60us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Diluted - net income attributable to common shareholders from continuing operations (in dollars per share)	$ 1.59us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Shares used in computation [Abstract]
Basic - net income attributable to common shareholders from continuing operations (in shares)	12,050us-gaap_WeightedAverageBasicSharesOutstandingProForma
Diluted - net income attributable to common shareholders from continuing operations (in shares)	12,069us-gaap_ProFormaWeightedAverageSharesOutstandingDiluted

X

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The weighted average number of shares or units and dilutive common stock or unit equivalents outstanding in the calculation of proforma diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

+ References

No definition available.

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+ References

No definition available.

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