Exit Activities and Reductions in Force (Details) (Employee Separation Costs [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Employee Separation Costs [Member]
Summary of exit activities and reduction in force initiatives
Accrual, Beginning balance	$ 0	$ 1,607
Charges	1,428	4,021
Cash Payments	0	(1,638)
Non-cash Amounts	0	31
Accrual, Ending balance	$ 1,428	$ 4,021