Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities not Subject to Fair Value Recognition) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets:
Notes receivable, Carrying Value	$ 90,184	$ 93,208
Liabilities:
Notes Payble, Carrying Value	312,613	309,952
Series 2012 Notes [Member]
Liabilities:
Notes Payble, Carrying Value	167,015	165,528
May 2015 Notes [Member]
Liabilities:
Notes Payble, Carrying Value	144,606	143,433
February 2015 Notes [Member]
Liabilities:
Notes Payble, Carrying Value	992	991
Wellstat Note Receivable [Member]
Assets:
Notes receivable, Carrying Value	37,157	41,098
Merus Labs Note Receivable [Member]
Assets:
Notes receivable, Carrying Value	30,000	30,000
AxoGen Note Receivable [Member]
Assets:
Notes receivable, Carrying Value	23,027	22,110
Fair Value Level 2 [Member]
Assets:
Notes receivable, Fair Value	30,000	30,000
Liabilities:
Notes payable, Fair Value		410,487
Fair Value Level 2 [Member] \| Series 2012 Notes [Member]
Liabilities:
Notes payable, Fair Value	235,940	227,187
Fair Value Level 2 [Member] \| May 2015 Notes [Member]
Liabilities:
Notes payable, Fair Value	188,489	182,031
Fair Value Level 2 [Member] \| February 2015 Notes [Member]
Liabilities:
Notes payable, Fair Value	1,318	1,269
Fair Value Level 2 [Member] \| Wellstat Note Receivable [Member]
Assets:
Notes receivable, Fair Value	0	0
Fair Value Level 2 [Member] \| Merus Labs Note Receivable [Member]
Assets:
Notes receivable, Fair Value	30,000	30,000
Fair Value Level 2 [Member] \| AxoGen Note Receivable [Member]
Assets:
Notes receivable, Fair Value	0	0
Fair Value Level 3 [Member]
Assets:
Notes receivable, Fair Value	60,184	63,208
Liabilities:
Notes payable, Fair Value	0
Fair Value Level 3 [Member] \| Series 2012 Notes [Member]
Liabilities:
Notes payable, Fair Value	0
Fair Value Level 3 [Member] \| May 2015 Notes [Member]
Liabilities:
Notes payable, Fair Value	0
Fair Value Level 3 [Member] \| February 2015 Notes [Member]
Liabilities:
Notes payable, Fair Value	0
Fair Value Level 3 [Member] \| Wellstat Note Receivable [Member]
Assets:
Notes receivable, Fair Value	37,157	41,098
Fair Value Level 3 [Member] \| Merus Labs Note Receivable [Member]
Assets:
Notes receivable, Fair Value	0	0
Fair Value Level 3 [Member] \| AxoGen Note Receivable [Member]
Assets:
Notes receivable, Fair Value	$ 23,027	$ 22,110

Name:	us-gaap_AssetsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_LiabilitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) more than one year from the balance sheet date. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

Name:	us-gaap_NotesAndLoansReceivableGrossNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13, 16

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

Name:	us-gaap_NotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date(s).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph b

-Article 5

+ Details

Name:	us-gaap_NotesReceivableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant