Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity
Stockholders' equity as of December 31, 2017			$ 613,215
Total comprehensive income	$ 201,755	$ 3,627	638,837	$ (26,505)
Dividends paid			(1,316,189)	0
Related party Promissory Note repayment			(750,000)	0
Payments for Repurchase of Common Stock			(225,000)	$ 0
Related party dividend of Promissory Note			653
Stockholders' deficit as of September 30, 2018	$ (1,038,484)		$ (1,038,484)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 45
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The cash outflow to reacquire common stock during the period.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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