Description of Business and Summary of Significant Accounting Policies (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities, Noncurrent		$ 1,088	$ 925
Assets [Abstract]
Total assets measured at fair value	[1]	13,949	4,030
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	39,460	8,510
Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Total assets measured at fair value	[1]	13,949	4,030
Fair Value, Inputs, Level 2 [Member]
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	0	0
Fair Value, Inputs, Level 3 [Member]
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	39,460	8,510
Contingent accrued earn-out acquisition consideration [Member]
Liabilities [Abstract]
Derivative liabilities	[1],[2]	39,460	8,510
Contingent accrued earn-out acquisition consideration [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities [Abstract]
Derivative liabilities	[1],[2]	39,460	8,510
Certificates of Deposit [Member]
Assets [Abstract]
Available-for-sale securities	[1]	13,949	4,030
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Available-for-sale securities	[1]	$ 13,949	$ 4,030

[1] months ended June 30, 2017 and the year ended December 31, 2016 there were no transfers between fair value levels 1, 2, or 3.

[2] The income valuation approach is applied and the valuation inputs include the contingent payment arrangement terms, projected cash flows, rate of return, and probability assessments.