Basis of Presentation and Summary of Significant Accounting Policies - Revenue Recognition, Related Sales Allowance and Accruals (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) deliverable	Sep. 30, 2016 USD ($)
Product Revenue
Gross product sales	$ 235,299	$ 201,303	$ 676,377	$ 530,076
Provision for product sales allowances and accruals:
Contractual adjustments	80,110	61,504	225,622	161,023
Governmental rebates	30,858	24,022	83,565	60,729
Total	110,968	85,526	309,187	221,752
Product sales, net	$ 124,331	$ 115,777	$ 367,190	$ 308,324
Service Revenue
Number of service revenue deliverables | deliverable			2
Prepayment term for storage of newborn cord blood and tissue units			18 years