Shareholders' Equity - Common Stock and Debt Repurchase Authorizations (Details)	Jul. 21, 2016 USD ($)
Debt Securities
Class of Stock [Line Items]
Debt repurchase program, amount authorized	$ 150,000,000
Common Stock
Class of Stock [Line Items]
Authorized repurchase of securities, with debt reduction target	$ 100,000,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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