Income Taxes (Changes in the Amount of Unrecognized Tax Benefits and Income Tax Examination) (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 1,344,000us-gaap_UnrecognizedTaxBenefits	$ 2,273,000us-gaap_UnrecognizedTaxBenefits
Additions for tax positions related to current year	144,000	404,000
Additions due to interest accrued	61,000	80,000
Payments	0	(250,000)
Settlements	0	(640,000)
Due to lapsed statutes of limitations	(275,000)	(488,000)
Other	0	(35,000)
Ending balance	1,274,000us-gaap_UnrecognizedTaxBenefits	1,344,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits, interest on income taxes accrued	100,000	100,000
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	(300,000)
Massachusetts
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Income tax settlement		300,000
Assessment issued by tax authority		$ 300,000

Income Tax Settlement

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Unrecognized Tax Benefits, Decreases Resulting From Prior Period Tax Positions, Due to Lapsed Statutes of Limitations

+ References

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Unrecognized Tax Benefits, Decreases Resulting From Prior Period Tax Positions, Other

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Unrecognized Tax Benefits, Decreases Resulting From Prior Period Tax Positions, Payments

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Unrecognized Tax Benefits, Decreases Resulting From Prior Period Tax Positions, Settlements

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Unrecognized Tax Benefits, Increases Resulting from Interest Accrued

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The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of interest expense accrued for an underpayment of income taxes.

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