Restructuring (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in restructuring liability
Balance at beginning of period	$ 113	$ 4,174	$ 421
Amounts charged to expense				23,503
Amounts paid	(44)	(2,604)	(352)	(16,887)
Non-cash expenses				(5,046)
Balance at end of period	69	1,570	69	1,570
Severance Expenses
Changes in restructuring liability
Balance at beginning of period		2,168	56
Amounts charged to expense				11,600
Amounts paid		(1,583)	(56)	(11,015)
Balance at end of period		585		585
Contract Termination Expenses
Changes in restructuring liability
Balance at beginning of period	113	1,609	365
Amounts charged to expense				5,840
Amounts paid	(44)	(885)	(296)	(5,116)
Balance at end of period	69	724	69	724
Asset Writedowns
Changes in restructuring liability
Amounts charged to expense				5,246
Non-cash expenses				(5,246)
Other Exit Expenses
Changes in restructuring liability
Balance at beginning of period		397
Amounts charged to expense				817
Amounts paid		(136)		(756)
Non-cash expenses				200
Balance at end of period		$ 261		$ 261