Description of Business and Summary of Significant Accounting Policies Impact of Change in Accounting Policy (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Impact of adopting Topic 606 on the Company’s unaudited consolidated financial statements [Abstract]
Other current assets	$ 60,747	$ 59,274
Assets, Current	370,174	427,380
Deferred tax asset, net	60,135	54,629
Other assets	48,344	26,714
Assets	1,622,503	1,610,947
Deferred Revenue, Current	30,369	35,609
Liabilities, Current	272,432	317,428
Deferred Revenue, Noncurrent	8,161	9,051
Liabilities	1,034,950	1,066,510
Retained Earnings (Accumulated Deficit)	$ 582,913	$ 535,118

Impact of adopting Topic 606 on the Company’s unaudited consolidated financial statements [Abstract]

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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