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Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Historical Cost	$ 44,861	$ 44,861
Accumulated Amortization	(26,108)	(24,871)
Net Balance	$ 18,753	$ 19,990
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life	9 years	9 years
Historical Cost	$ 41,001	$ 41,001
Accumulated Amortization	(23,917)	(22,778)
Net Balance	17,084	$ 18,223
Tradenames and trademarks
Finite-Lived Intangible Assets [Line Items]
Useful Life		10 years
Historical Cost	3,286	$ 3,286
Accumulated Amortization	(1,725)	(1,643)
Net Balance	$ 1,561	$ 1,643
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years	5 years
Historical Cost	$ 574	$ 574
Accumulated Amortization	(466)	(450)
Net Balance	$ 108	$ 124
Maximum [Member] | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years

X

- Definition

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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- Definition

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+ 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)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before 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)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

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+ References

No definition available.

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- Definition

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+ 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)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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