Termination Charges (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Termination charges	$ 1,700,000	$ 2,900,000	$ 6,600,000
Termination benefits remitted by company	1,100,000	700,000	1,100,000
Termination benefits expected to be paid within next 12 months	582,000	3,099,000
2012 [Member]
Termination benefits paid for charges recorded in prior periods	2,200,000
2011 [Member]
Termination benefits paid for charges recorded in prior periods	700,000	4,000,000
One-time Termination Benefits [Member]
Restructuring Reserve	600,000
Salary and Benefits Continuation [Member]
Termination charges			5,800,000
Salary and Benefits Continuation [Member] | 2012 [Member]
Termination benefits remaining to be paid	0
Salary and Benefits Continuation [Member] | 2011 [Member]
Termination benefits remaining to be paid	0
Special Termination Benefits [Member]
Termination charges			800,000
Salary and Benefits Continuation AND Special Termination Benefits [Member]
Termination benefits included in liabilities	$ 600,000