Schedule II Valuation Accounts (Details) (Allowance For Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 503		$ 794		$ 819
Net Additions (Reductions) to Expense	248		(227)		29
Deductions	(71)	[1]	(64)	[1]	(54)	[1]
Balance at End of Period	$ 680		$ 503		$ 794

[1] Primarily consists of write-offs, net of recoveries and other adjustments