Income Taxes (Changes in the Amount of Unrecognized Tax Benefits and Income Tax Examination) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 2,273,000	$ 2,306,000
Additions for tax positions related to current year	404,000	368,000
Additions due to interest accrued	80,000	100,000
Payments	(250,000)	(42,000)
Settlements	(640,000)	0
Due to lapsed statutes of limitations	(488,000)	(484,000)
Other	(35,000)	25,000
Ending balance	1,344,000	2,273,000
Unrecognized tax benefits, interest on income taxes accrued	100,000	400,000
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