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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Other Intangible Assets - Narrative (Detail) (USD $)	3 Months Ended		12 Months Ended
Other Intangible Assets - Narrative (Detail) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2011	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets cost			$ 32,900,000
Accumulated amortization	19,745,000			18,836,000
Amortization of other intangible assets	900,000us-gaap_AmortizationOfIntangibleAssets	1,100,000us-gaap_AmortizationOfIntangibleAssets
Intangible asset, weighted average amortization period	7 years
Intangible assets	13,155,000us-gaap_FiniteLivedIntangibleAssetsNet			14,064,000us-gaap_FiniteLivedIntangibleAssetsNet
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	19,029,000			18,167,000
Intangible assets	11,071,000			11,933,000
Tradename [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	716,000			669,000
Intangible assets	$ 2,084,000			$ 2,131,000
Maximum \| Neighborhood Holdings Inc [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Maximum \| Neighborhood Holdings Inc [Member] \| Tradename [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	15 years