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Long-Term Debt and Credit Facility (Term Loan) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | May. 10, 2013
Debt Instrument [Line Items] |  |  |
Debt outstanding | $ 50,546,000 | $ 44,041,000 |
Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Face amount |  |  | $ 50,000,000
Monthly principal payments | 600,000 |  |
Debt outstanding | 25,398,000 | $ 35,541,000 |
PNC Bank base lending rate [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt outstanding | $ 400,000 |  |
Interest rate at period end | 4.75% |  |
LIBOR [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt outstanding | $ 25,000,000 |  |
Interest rate at period end | 2.50% |  |
Minimum [Member] | PNC Bank base lending rate [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 1.25% |  |
Minimum [Member] | LIBOR [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 2.25% |  |
Maximum [Member] | PNC Bank base lending rate [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 1.75% |  |
Maximum [Member] | LIBOR [Member] | Term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 2.75% |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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