Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the Company’s financial assets and liabilities that are measured at fair value on a recurring basis:

			Fair value measurements using:
	Fair Value		Level 1		Level 2		Level 3
December 31, 2015:
Current liabilities:
Contingent consideration	$	4,900		—		—	$	4,900
Long-term liabilities:
Contingent consideration	$	262,368		—		—	$	262,368
December 31, 2014:
Cash equivalents:
Money market funds	$	189,031	$	189,031		—		—
Current liabilities:
Contingent consideration	$	10,000		—		—	$	10,000
Long-term liabilities:
Contingent consideration	$	96,000		—		—	$	96,000

Schedule of Roll-forward of Fair Value of Level 3 Instruments

The following table includes a roll-forward of the fair value of Level 3 financial instruments for the year ended December 31, 2015:

	Year Ended December 31, 2015
Contingent consideration (current and long-term):
Balance at beginning of period	$	106,000
Amounts acquired or issued		171,942
Net change in fair value		(10,674	)
Settlements		—
Transfers in and/or out of Level 3		—
Balance at end of period	$	267,268

Fair Value of Other Financial Instruments Not Measured on Recurring Basis

The following table presents the total balance of the Company’s other financial instruments that are not measured at fair value on a recurring basis.

			Fair value measurements using:
	Total Balance		Level 1		Level 2		Level 3
December 31, 2015:
Assets:
Bank deposits (included in “Cash and cash    equivalents”)	$	225,853	$	225,853		—		—
Liabilities:
Borrowings under Revolving Credit Facility	$	75,000	$	75,000		—		—
December 31, 2014:
Assets:
Bank deposits (included in “Cash and cash    equivalents”)	$	313,646	$	313,646		—		—
Liabilities:
Convertible Notes	$	359,219		—	$	359,219		—