Debt - Textual (Details) (USD $)	3 Months Ended							0 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2014 institution	Mar. 31, 2014 Farmadiet Acquisition [Member]	Dec. 31, 2013 Farmadiet Acquisition [Member]	Mar. 31, 2014 Minimum [Member] Farmadiet Acquisition [Member]	Mar. 31, 2014 Maximum [Member] Farmadiet Acquisition [Member]	Mar. 31, 2014 Notes [Member]	Dec. 31, 2013 Notes [Member]	Aug. 29, 2013 Notes [Member] Notes Due February 1, 2033 [Member]	Jan. 30, 2013 Notes [Member] Notes Due February 1, 2033 [Member] Rate	Mar. 31, 2014 Notes [Member] Notes Due February 1, 2033 [Member] Rate	Mar. 31, 2014 Notes [Member] Notes Due February 1, 2033 [Member] Minimum [Member]	Mar. 31, 2014 Notes [Member] Notes Due February 1, 2033 [Member] Maximum [Member]	Mar. 31, 2014 Notes [Member] Notes Due February 1, 2033 [Member] On or after February 1, 2017 and before February 1, 2019 [Member]	Mar. 31, 2014 Notes [Member] Notes Due February 1, 2033 [Member] On or after February 1, 2019 [Member]	Mar. 31, 2014 Line of Credit [Member]	Dec. 31, 2013 Line of Credit [Member]
Debt Instrument [Line Items]
Principal balance		$ 3,732,000	$ 5,234,000			$ 224,801,000	$ 211,912,000			$ 158,100,000
Debt face amount									175,000,000.0
Interest rate of notes payable	3.00%								3.00%
Equivalent redemption price										100.00%			100.00%	100.00%
Convertible debt, conversion ratio								141.4827	141.4827	141.4827
Convertible debt, principal amount for conversion								1,000
Convertible debt, conversion price									$ 7.07	$ 7.07
Convertible debt, threshold percentage of stock price trigger										130.00%
Number of trading days applicable conversion price											20 days
Number of consecutive trading days applicable conversion price												30 days
Gain (loss) on embedded derivative	$ 11,100,000
Number of financial institutions	12
Weighted average interest rate		3.40%	3.90%												5.90%	7.70%
Variable interest rates				2.70%	6.30%