Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	$ (26,678,000)	$ (55,100,000)	$ (26,678,000)	$ (55,100,000)	$ (27,745,000)	$ (55,300,000)
Other comprehensive income loss before reclassifications			(2,500,000)	3,900,000
Amounts reclassified from accumulated other comprehensive income loss			3,500,000	(3,700,000)
Net current period other comprehensive income loss	(4,322,000)	12,839,000	1,066,000	169,000
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	400,000	9,200,000	400,000	9,200,000	5,600,000	4,200,000
Other comprehensive income loss before reclassifications			1,400,000	7,800,000
Amounts reclassified from accumulated other comprehensive income loss			(6,600,000)	(2,800,000)
Net current period other comprehensive income loss			(5,200,000)	5,000,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(7,100,000)	(1,400,000)	(7,100,000)	(1,400,000)	(23,700,000)	(10,700,000)
Other comprehensive income loss before reclassifications			6,500,000	10,200,000
Amounts reclassified from accumulated other comprehensive income loss			10,100,000	(900,000)
Net current period other comprehensive income loss			16,600,000	9,300,000
Accumulated Defined Benefit Plans Adjustment
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(19,000,000)	(19,400,000)	(19,000,000)	(19,400,000)	(19,600,000)	(21,700,000)
Other comprehensive income loss before reclassifications			600,000	2,300,000
Amounts reclassified from accumulated other comprehensive income loss			0	0
Net current period other comprehensive income loss			600,000	2,300,000
Accumulated Translation Adjustment
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(1,000,000)	(43,500,000)	(1,000,000)	(43,500,000)	10,000,000	(27,100,000)
Other comprehensive income loss before reclassifications			(11,000,000)	(16,400,000)
Amounts reclassified from accumulated other comprehensive income loss			0	0
Net current period other comprehensive income loss			$ (11,000,000)	$ (16,400,000)