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Goodwill and Identifiable Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Changes in the carrying amount of goodwill
Balance at the beginning of period	$ 140,341us-gaap_Goodwill	$ 114,588us-gaap_Goodwill
Additions	3,228us-gaap_GoodwillAcquiredDuringPeriod	26,480us-gaap_GoodwillAcquiredDuringPeriod
Impairment adjustment		(727)us-gaap_GoodwillImpairmentLoss
Balance at the end of period	$ 143,569us-gaap_Goodwill	$ 140,341us-gaap_Goodwill

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



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+ Details

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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

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-Section 50

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X

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Subparagraph (b)

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