Fair Value Measurements - Level 3 Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Contingent consideration
Total losses (gains) for the period:
Beginning Balance, liabilities	$ 71,620
Included in results of operations, liabilities	24,078
Payments	(24,464)
Ending Balance, liabilities	71,234
Deferred acquisition payments, net of discount
Total losses (gains) for the period:
Beginning Balance, liabilities	5,465
Included in results of operations, liabilities	(735)
Payments	(4,730)
Ending Balance, liabilities	0
Embedded conversion option
Total losses (gains) for the period:
Beginning Balance, liabilities	101,087
Included in results of operations, liabilities	(3,291)
Conversion	(47,353)
Ending Balance, liabilities	$ 50,443