Description of Business and Summary of Significant Accounting Policies (Accounts Receivables and Allowances) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net, Current	$ 39,070,000	$ 37,298,000
Allowance for doubtful accounts	1,049,000	1,157,000
Deferred revenue included in accounts receivables	6,700,000	7,000,000
Bad debt expense	1,147,000	442,000	976,000
Billed Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net, Current	31,200,000	28,500,000
Unbilled Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net, Current	$ 7,900,000	$ 8,800,000