Restructuring and Other Related Charges (Details) (USD $)	3 Months Ended								12 Months Ended			3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]
Other Cost and Expense, Operating	$ 113,694,000	$ 3,999,000	$ 11,284,000	$ 10,276,000	$ 2,896,000	$ 61,632,000	$ 31,268,000	$ 4,006,000	$ 139,253,000	$ 99,802,000	$ 65,713,000
Company-wide Reorganization Plan [Member]
Restructuring liabilities [Roll Forward]
Restructuring liabilities, beginning				4,508,000				7,122,000	4,508,000	7,122,000
Restructuring liabilities, utilized									(2,002,000)	(2,614,000)
Restructuring liabilities, ending	2,506,000				4,508,000				2,506,000	4,508,000
Restructuring and Related Cost, Cost Incurred to Date	12,000,000								12,000,000
Restructuring and Other Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Other Cost and Expense, Operating									566,000	0	8,956,000
Restructuring and Other Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges												9,000,000
Contract Termination [Member] | Company-wide Reorganization Plan [Member]
Restructuring liabilities [Roll Forward]
Restructuring liabilities, beginning				4,446,000				6,755,000	4,446,000	6,755,000
Restructuring liabilities, utilized									(1,966,000)	(2,309,000)
Restructuring liabilities, ending	2,480,000				4,446,000				2,480,000	4,446,000
Other assets, fees and facility exit costs [Member] | Company-wide Reorganization Plan [Member]
Restructuring liabilities [Roll Forward]
Restructuring liabilities, beginning				62,000				367,000	62,000	367,000
Restructuring liabilities, utilized									(36,000)	(305,000)
Restructuring liabilities, ending	$ 26,000				$ 62,000				$ 26,000	$ 62,000