Debt (Credit Facility) (Narrative) (Details) (USD $)	3 Months Ended			0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended	2 Months Ended			3 Months Ended			0 Months Ended			2 Months Ended			2 Months Ended	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Feb. 28, 2014	Mar. 26, 2013 Revolving Credit Facility And Together With Term Loan Facilities 2011 Credit Facility [Member]	Mar. 31, 2014 Revolving Credit Facility And Together With Term Loan Facilities 2011 Credit Facility [Member]	Mar. 26, 2013 2013 Credit Facility [Member]	Mar. 31, 2014 2013 Credit Facility [Member]	Mar. 31, 2013 2013 Credit Facility [Member]	Dec. 31, 2013 2013 Credit Facility [Member]	Dec. 31, 2012 2013 Credit Facility [Member]	Mar. 31, 2013 2011 Credit Facility [Member]	Dec. 31, 2012 2011 Credit Facility [Member]	Feb. 28, 2014 Five Year Senior Secured Term A Facility [Member]	Mar. 31, 2014 Term Loan A Facility Due 2019 [Member]	Dec. 31, 2013 Term Loan A Facility Due 2019 [Member]	Mar. 31, 2014 Term Loan A Facility Due 2018 [Member]	Dec. 31, 2013 Term Loan A Facility Due 2018 [Member]	Mar. 26, 2013 Term Loan A Facility Due 2018 [Member]	Mar. 26, 2013 Term Loan B Facility Due 2018 [Member]	Mar. 31, 2014 Term Loan B Facility Due 2018 [Member]	Dec. 31, 2013 Term Loan B Facility Due 2018 [Member]	Feb. 28, 2014 Five Year Senior Secured Term B Facility [Member]	Mar. 31, 2014 Term Loan B Facility Due 2021 [Member]	Dec. 31, 2013 Term Loan B Facility Due 2021 [Member]	Feb. 28, 2014 Five Year Revolving Credit Facility [Member]	Mar. 31, 2014 Minimum [Member] 2011 Credit Facility [Member]	Mar. 31, 2014 Maximum [Member] 2011 Credit Facility [Member]	Feb. 28, 2014 Maximum [Member] Five Year Revolving Credit Facility [Member]	Dec. 31, 2013 LIBOR Rate [Member] Minimum [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 LIBOR Rate [Member] Minimum [Member] Term Loan B Facility Due 2018 [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 LIBOR Rate [Member] Maximum [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 LIBOR Rate [Member] Maximum [Member] Term Loan B Facility Due 2018 [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Alternate Base Rate [Member] Term Loan B Facility Due 2018 [Member] 2011 Credit Facility [Member]	Dec. 31, 2013 Alternate Base Rate [Member] Minimum [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Alternate Base Rate [Member] Maximum [Member] 2013 Credit Facility [Member]	Feb. 28, 2014 Letter of Credit [Member]	Feb. 28, 2014 Swing Line Loan [Member]	Feb. 28, 2014 Paladin Labs Inc. [Member]
Line of Credit Facility [Line Items]
Debt instrument, term													5 years									7 years			5 years
Face value of debt instrument														$ 1,100,000,000	$ 0	$ 0	$ 1,335,469,000			$ 0	$ 60,550,000		$ 425,000,000	$ 0
Current borrowing capacity of line of credit facility																									750,000,000											50,000,000	50,000,000
Uncommitted Expansion Provision Amount																												1,000,000,000
Proceeds from issuance of Term Loans	1,525,000,000	0
Amount outstanding			1,400,000,000															1,387,500,000	60,600,000
Maximum leverage ratio	2.75
Long term debt, term					5 years											5 years
Additional borrowings						500,000,000
Margin rate over base rate																													1.50%		2.25%		1.50%	0.50%	1.25%
Libor Margin																														0.75%		2.50%
Commitment fee basis points																										0.30%	0.50%
Payments and accruals of deferred financing costs							8,100,000		27,700,000
Payments of financing costs	38,435,000	7,251,000					7,600,000		26,700,000
Repayments of Long-term Debt																			100,000,000
License agreement term extension				2 years
Line of Credit Facility, Maximum Borrowing Capacity			75,000,000	500,000,000
Loss on extinguishment of debt	(9,596,000)	(11,312,000)						500,000		1,000,000	8,600,000	8,600,000							2,200,000
Previously existing debt assumed																																						$ 23,826,000