Significant Accounting Policies (Investments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Investment [Line Items]
Company owned life insurance	$ 2,000,000
Payments to acquire life insurance policies	5,000,000
Cash surrender value of life insurance	5,931,000	5,660,000
Increase in cash surrender value of company owned life insurance	271,000	140,000
Proceeds from life insurance policies	$ 0
Maximum [Member] | Private Equity Funds [Member]
Investment [Line Items]
Investment owned, percent of net assets	1.00%