Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	$ (55,305,000)	$ (26,500,000)	$ (21,600,000)
Other comprehensive income (loss), before reclassifications	24,300,000	3,800,000	(2,500,000)
Amounts reclassified from accumulated other comprehensive income (loss)	3,300,000	(32,600,000)	(2,400,000)
Net current period other comprehensive income (loss)	27,560,000	(28,705,000)	(22,000)
Accumulated other comprehensive income (loss), net of tax ending balance	(27,745,000)	(55,305,000)	(26,500,000)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	4,200,000	0	12,400,000
Other comprehensive income (loss), before reclassifications	11,800,000	5,100,000	(200,000)
Amounts reclassified from accumulated other comprehensive income (loss)	(10,400,000)	(900,000)	(12,200,000)
Net current period other comprehensive income (loss)	1,400,000	4,200,000	(12,400,000)
Accumulated other comprehensive income (loss), net of tax ending balance	5,600,000	4,200,000	0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(10,700,000)	32,800,000	(9,800,000)
Other comprehensive income (loss), before reclassifications	(26,700,000)	(11,800,000)	32,800,000
Amounts reclassified from accumulated other comprehensive income (loss)	13,700,000	(31,700,000)	9,800,000
Net current period other comprehensive income (loss)	(13,000,000)	(43,500,000)	42,600,000
Accumulated other comprehensive income (loss), net of tax ending balance	(23,700,000)	(10,700,000)	32,800,000
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(21,700,000)	(9,000,000)	200,000
Other comprehensive income (loss), before reclassifications	2,100,000	(12,700,000)	(9,200,000)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Net current period other comprehensive income (loss)	2,100,000	(12,700,000)	(9,200,000)
Accumulated other comprehensive income (loss), net of tax ending balance	(19,600,000)	(21,700,000)	(9,000,000)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(27,100,000)	(50,300,000)	(24,400,000)
Other comprehensive income (loss), before reclassifications	37,100,000	23,200,000	(25,900,000)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0
Net current period other comprehensive income (loss)	37,100,000	23,200,000	(25,900,000)
Accumulated other comprehensive income (loss), net of tax ending balance	10,000,000	(27,100,000)	(50,300,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net current period other comprehensive income (loss)	$ 27,560,000	$ (28,770,000)	$ (4,925,000)