Goodwill and Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Amortized intangible assets
Original Cost	$ 48,272	$ 39,493
Accumulated Amortization	23,861	20,010
Net Book Value	24,411us-gaap_FiniteLivedIntangibleAssetsNet	19,483us-gaap_FiniteLivedIntangibleAssetsNet
Customer list
Amortized intangible assets
Original Cost	21,757	20,058
Accumulated Amortization	10,374	8,833
Net Book Value	11,383	11,225
Non-compete agreement
Amortized intangible assets
Original Cost	3,502	2,949
Accumulated Amortization	2,187	1,860
Net Book Value	1,315	1,089
Supply agreement
Amortized intangible assets
Original Cost	9,806	5,186
Accumulated Amortization	3,082	2,477
Net Book Value	6,724	2,709
Technology
Amortized intangible assets
Original Cost	2,100	2,100
Accumulated Amortization	1,225	805
Net Book Value	875	1,295
Trademarks and patents
Amortized intangible assets
Original Cost	3,218	2,357
Accumulated Amortization	876	641
Net Book Value	2,342	1,716
Lease intangible
Amortized intangible assets
Original Cost	5,985	4,939
Accumulated Amortization	4,422	3,866
Net Book Value	1,563	1,073
Other
Amortized intangible assets
Original Cost	1,904	1,904
Accumulated Amortization	1,695	1,528
Net Book Value	$ 209	$ 376

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

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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