Acquisitions (Narrative) (Details) - Challenger And Hybrid [Member] $ in Thousands	Jun. 30, 2016 USD ($)
Business Acquisition [Line Items]
Acquisition purchase price	$ 22,717
Acquisition purchase price based on future performance	6,000
Other Long-Term Liabilities [Member]
Business Acquisition [Line Items]
Acquisition purchase price based on future performance	3,500
Accrued Expenses And Other Current Liabilities [Member]
Business Acquisition [Line Items]
Acquisition purchase price based on future performance	$ 2,500