Debt (Credit Facility) (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Line of Credit Facility [Line Items]
Amount outstanding	$ 1,400,000,000
Maximum leverage ratio	2.75
Payments of financing costs				59,899,000	8,129,000
Maximum borrowing capacity of line of credit facility	75,000,000.0
Loss on extinguishment of debt		(2,027,000)	0	(31,712,000)	(11,312,000)
Paladin Labs Inc. [Member]
Line of Credit Facility [Line Items]
Previously existing debt assumed	23,826,000
2013 Credit Facility [Member]
Line of Credit Facility [Line Items]
Payments and accruals of deferred financing costs	27,700,000
Payments of financing costs	26,700,000
Loss on extinguishment of debt	1,000,000
2011 Credit Facility [Member]
Line of Credit Facility [Line Items]
Loss on extinguishment of debt	8,600,000
Swing Line Loan [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity of line of credit facility	50,000,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity of line of credit facility	50,000,000
Minimum [Member] | 2013 Credit Facility [Member] | LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Margin rate over base rate	1.50%
Minimum [Member] | 2013 Credit Facility [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Margin rate over base rate	0.50%
Minimum [Member] | 2011 Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment fee basis points	0.30%
Maximum [Member] | 2013 Credit Facility [Member] | LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Margin rate over base rate	2.25%
Maximum [Member] | 2013 Credit Facility [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Margin rate over base rate	1.25%
Maximum [Member] | 2011 Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment fee basis points	0.50%
Five Year Senior Secured Term A Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, term	5 years
Term Loan A Facility Due 2019 [Member]
Line of Credit Facility [Line Items]
Face value of debt instrument	1,100,000,000
Five Year Senior Secured Term B Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, term	7 years
Term Loan B Facility Due 2021 [Member]
Line of Credit Facility [Line Items]
Face value of debt instrument	425,000,000
Five Year Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, term	5 years
Current borrowing capacity of line of credit facility	750,000,000
Five Year Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Uncommitted expansion provision amount	$ 1,000,000,000
Term Loan B Facility Due 2018 [Member] | 2011 Credit Facility [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Margin rate over base rate	1.50%
Term Loan B Facility Due 2018 [Member] | Minimum [Member] | 2013 Credit Facility [Member] | LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Libor Margin	0.75%
Term Loan B Facility Due 2018 [Member] | Maximum [Member] | 2013 Credit Facility [Member] | LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Libor Margin	2.50%