Restructurings (Details Textual) (USD $)	3 Months Ended			6 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended		12 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 First Quarter Two Thousand Thirteen [Member]	Mar. 31, 2013 First Quarter Two Thousand Thirteen [Member]	Dec. 31, 2012 First Quarter Two Thousand Thirteen [Member]	Jun. 30, 2013 Second Quarter Two Thousand Thirteen [Member]	Mar. 31, 2013 Second Quarter Two Thousand Thirteen [Member]	Dec. 31, 2012 Second Quarter Two Thousand Thirteen [Member]	Jun. 30, 2013 Maximum [Member]	Mar. 31, 2013 Maximum [Member]	Dec. 31, 2012 Maximum [Member]	Jun. 30, 2013 Minimum [Member]	Mar. 31, 2013 Minimum [Member]	Dec. 31, 2012 Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs				$ 132,000
Restructuring charges	464,000	2,500,000	(70,000)	2,970,000	(107,000)
Restructuring and Related Cost, Expected Number of Positions Eliminated													12	19	20	5	12	15
Payments for Restructuring	1,720,000	1,842,000					757,000	1,583,000		501,000	0
Restructuring Accruals	596,000	2,534,000					0	2,505,000		596,000	0
Restructuring Reserve	$ 189,000	$ 1,445,000		$ 189,000		$ 776,000	$ 62,000	$ 922,000	$ 0	$ 95,000	$ 0	$ 0