Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Facilities Realignment (Details) - USD ($) $ in Thousands	6 Months Ended
Facilities Realignment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Current	$ 404		$ 517
Restructuring Reserve, Noncurrent	0
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Balance as of December 31, 2012	767
Accretion	70	$ 71
Adjustments	0
Payments	(393)
Restructuring Reserve, Balance as of March 31, 2013	444
Commercial Services [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Balance as of December 31, 2012	560
Accretion	56
Adjustments	0
Payments	(314)
Restructuring Reserve, Balance as of March 31, 2013	302
Segment, Discontinued Operations [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Balance as of December 31, 2012	207
Accretion	14
Adjustments	0
Payments	(79)
Restructuring Reserve, Balance as of March 31, 2013	$ 142