Fair Value Measurements (Details) (USD $)			9 Months Ended
	Sep. 30, 2013 item	Dec. 31, 2012	Sep. 30, 2013 Contingent earn-out obligations	Sep. 30, 2013 Recurring basis Total	Sep. 30, 2013 Recurring basis Quoted Market Prices In Active Markets for Identical Assets (Level 1)	Sep. 30, 2013 Recurring basis Significant Other Observable Inputs (Level 2)	Sep. 30, 2013 Recurring basis Significant Unobservable Inputs (Level 3)
Fair Value Measurements
Cash and cash equivalents				$ 45,305,000	$ 45,305,000
Life insurance - cash surrender value				2,753,000		2,753,000
Contingent earn-out obligations				1,270,000			1,270,000
Number of employees covered under life insurance policies	40
Combined face value of life insurance policies	40,700,000
Cash surrender value	2,800,000	2,500,000
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)
Balance at beginning of year			1,966,000
Adjustments to fair value			(696,000)
Balance at end of period			$ 1,270,000