Restructuring Expense-Strategic Restructuring (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013 sqft	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013 sqft	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2003
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges									$ 500,000	$ 7,900,000
Restructuring Expense	27,658,000	12,048,000	776,000	39,000	194,000	696,000	594,000	360,000			40,521,000	1,844,000	2,074,000	91,824,000
Cash Payments														(17,816,000)
Non-cash Expense											7,594,000	0	0
Restructuring Liability														69,526,000
Area of Real Estate Property	120,000										120,000
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges											2,000,000
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges											2,500,000
2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Expense											38,951,000
Cash Payments											(22,916,000)
Non-cash Expense											(7,594,000)
Restructuring Liability	8,441,000										8,441,000
2013 Restructuring Plan | Employee severance, benefits and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring Expense											25,060,000
Cash Payments											(21,458,000)
Non-cash Expense											(1,312,000)
Restructuring Liability	2,290,000										2,290,000
2013 Restructuring Plan | Asset impairments
Restructuring Cost and Reserve [Line Items]
Restructuring Expense											6,282,000
Cash Payments											0
Non-cash Expense											(6,282,000)
Restructuring Liability	0										0
2013 Restructuring Plan | Contract termination and other associated costs
Restructuring Cost and Reserve [Line Items]
Restructuring Expense											7,609,000
Cash Payments											(1,458,000)
Non-cash Expense											0
Restructuring Liability	$ 6,151,000										$ 6,151,000