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Streamlining and Restructuring Charges (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 Position | Dec. 31, 2012 | Dec. 31, 2011
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Number of positions eliminated | 84 |  |  |  |
Number of positions eliminated (in hundredths) | 34.00% |  |  |  |
Recorded accelerated depreciation | $ 2,200,000 |  |  |  |
Moving and other facility costs | 700,000 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance beginning | 75,000 |  | 162,000 |  |
Restructuring charges | 328,000 |  | 5,074,000 |  | 0
Cash payments | (434,000) |  | (2,716,000) |  |
Proceeds from sale of assets |  |  | 461,000 |  |
Adjustments | 52,000 |  | (2,906,000) |  |
Balance, ending | 21,000 |  | 75,000 |  | 162,000
Employee Severance and Other Benefits [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance beginning | 0 |  | 0 |  |
Restructuring charges | 0 |  | 2,027,000 |  |
Cash payments | 0 |  | (2,027,000) |  |
Proceeds from sale of assets |  |  | 0 |  |
Adjustments | 0 |  | 0 |  |
Balance, ending | 0 |  | 0 |  |
Facility Charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance beginning | 75,000 | [1] | 162,000 | [1] |
Restructuring charges | 328,000 | [1] | 587,000 | [1] |
Cash payments | (434,000) | [1] | (689,000) | [1] |
Proceeds from sale of assets |  |  | 0 | [1] |
Adjustments | 52,000 | [1] | 15,000 | [1] |
Balance, ending | 21,000 | [1] | 75,000 | [1] |
Sale of Assets [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges | 300,000 |  | 2,000,000 |  |
Asset Impairment and Accelerated Depreciation [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance beginning | 0 | [2] | 0 | [2] |
Restructuring charges | 0 | [2] | 2,460,000 | [2] |
Cash payments | 0 | [2] | 0 | [2] |
Proceeds from sale of assets |  |  | 461,000 | [2] |
Adjustments | 0 | [2] | (2,921,000) | [2] |
Balance, ending | $ 0 | [2] | $ 0 | [2] |
[1] | Includes moving and relocation costs, and lease payments, net of sublease payments.
[2] | Restructuring charges include non-cash impairments and accelerated depreciation of property and equipment and leasehold improvements; however, these amounts are excluded from the restructuring accrual.

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + 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) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount of cash inflow from the sale of other assets as part of operating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + 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) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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