Restructuring and Other Charges (Recoveries) (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2012 employees	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated as part of work force reductions	350
Pre-tax restructuring charge				$ 7,000,000
Restructuring and other charges (recoveries), net		2,387,000	(470,000)	8,070,000
Hill Hire contract termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges (recoveries), net				$ 1,000,000