Company Information and Significant Accounting Policies Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Significant Accounting Policies [Line Items]
Net cash provided (used) by financing activities		$ 62,627	$ 40,090	$ (16,657)
Net cash used by operating activities		(21,380)	27,861	42,543
ASU 2016-09 | New Accounting Pronouncement, Early Adoption, Effect
Significant Accounting Policies [Line Items]
Net cash provided (used) by financing activities				4,600
Net cash used by operating activities				$ 4,600
Income Tax Expense (Benefit)	$ 200		$ (1,400)
Restatement | ASU 2016-09 | New Accounting Pronouncement, Early Adoption, Effect
Significant Accounting Policies [Line Items]
Income Tax Expense (Benefit)		$ 1,600