Restructuring Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring activities
Restructuring (income) expense	$ 40,843	$ 12,048	$ 46,761	$ 12,863
Kendall Restructuring
Restructuring activities
Liability, beginning of the period	14,936	22,052	19,115	23,328
Cash payments	(4,249)	(3,902)	(12,071)	(11,323)
Cash received from subleases	2,689	2,670	8,067	8,000
Restructuring (income) expense	(464)	524	(2,199)	1,339
Liability, end of the period	12,912	21,344	12,912	21,344
Fan Pier Move Restructuring
Restructuring activities
Liability, beginning of the period	3,256	0	797	0
Cash payments	(2,266)	(80)	(6,643)	(80)
Restructuring (income) expense	39,752	80	46,588	80
Liability, end of the period	40,742	0	40,742	0
Other Restructuring
Restructuring activities
Liability, beginning of the period	792	0	8,441	0
Cash payments	(399)	0	(8,865)	0
Impairment of property and equipment	0	(6,650)	0	(6,650)
Restructuring (income) expense	1,555	11,444	2,372	11,444
Liability, end of the period	$ 1,948	$ 4,794	$ 1,948	$ 4,794