Fair Value Measurements - Assets And Liabilities Measured At Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Total assets	$ 20,659	$ 13,898
Liabilities:
Total liabilities	58,237	61,812
Quoted prices in active markets for identical assets (Level 1)
Assets:
Total assets	17,105	9,842
Significant other observable inputs (Level 2)
Assets:
Total assets	3,554	4,056
Significant unobservable inputs (Level 3)
Liabilities:
Total liabilities	58,237	61,812
Embedded conversion option
Liabilities:
Total liabilities	6,722	16,736
Embedded conversion option | Significant unobservable inputs (Level 3)
Liabilities:
Total liabilities	6,722	16,736
Contingent consideration
Liabilities:
Total liabilities	51,515	45,076
Contingent consideration | Significant unobservable inputs (Level 3)
Liabilities:
Total liabilities	51,515	45,076
Money market funds
Assets:
Total assets	13,320	5,314
Money market funds | Quoted prices in active markets for identical assets (Level 1)
Assets:
Total assets	13,320	5,314
Common stock investments, available for sale
Assets:
Total assets	3,785	4,528
Common stock investments, available for sale | Quoted prices in active markets for identical assets (Level 1)
Assets:
Total assets	3,785	4,528
Common stock options/warrants
Assets:
Total assets	3,537	4,017
Common stock options/warrants | Significant other observable inputs (Level 2)
Assets:
Total assets	3,537	4,017
Forward contracts
Assets:
Total assets	17	39
Forward contracts | Significant other observable inputs (Level 2)
Assets:
Total assets	$ 17	$ 39