Business Combination - Fair Value of Other Intangible Assets Acquired and Useful Lives (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 04, 2019
Other intangible assets:
Estimated Fair Value	$ 60,900
SVB Leerink
Other intangible assets:
Estimated Fair Value		$ 60,900
Customer relationships
Other intangible assets:
Estimated Fair Value	$ 42,000
Customer relationships | SVB Leerink
Other intangible assets:
Estimated Fair Value		42,000
Weighted Average Estimated Useful Life - in Years	11 years
Other
Other intangible assets:
Estimated Fair Value	$ 18,900
Other | SVB Leerink
Other intangible assets:
Estimated Fair Value		$ 18,900
Weighted Average Estimated Useful Life - in Years	9 years 10 months 24 days