Restructuring Costs and Other, Net (Details) (USD $)	12 Months Ended		9 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012 Office Based Personnel [Member] employees	Sep. 30, 2012 Field Based Personnel [Member] employees	Dec. 31, 2011 Leipzig Closure 2011 [Member]	Dec. 31, 2012 Leipzig Closure 2011 [Member]	Dec. 31, 2011 Leipzig Closure 2011 [Member]	Dec. 31, 2011 2010 Workforce Reductions [Member]	Dec. 31, 2012 Leases and Equipment Write-Offs [Member]	Dec. 31, 2011 Leases and Equipment Write-Offs [Member]	Dec. 31, 2012 Other Associated Costs [Member]	Dec. 31, 2011 Other Associated Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 2,172,000	$ 2,400,000
Payments for restructuring	(800,000)	(300,000)
Number of positions eliminated due to restructuring			30	42
Restrucruting and related cost expected cost year one	1,000,000
Employee serverance and other personnel benefits:
Restructuring Reserve, Beginning of Period	1,615,000	144,000				697,000	0	134,000	0	10,000	918,000	0
Business Exit Costs	229,000	2,053,000				0	950,000	(119,000)	304,000		229,000	918,000
Restructuring Reserve, Settled with Cash	(835,000)	(278,000)				(697,000)	(253,000)	(15,000)		(10,000)	(138,000)	0
Restructuring Reserve, Settled without Cash	0	(304,000)				0	0	0		(304,000)		0
Restructuring Reserve, End of Period	$ 1,009,000	$ 1,615,000			$ 697,000	$ 0	$ 697,000	$ 0		$ 0	$ 1,009,000	$ 918,000