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Stock Repurchase Plan	12 Months Ended
Stock Repurchase Plan	Dec. 31, 2018
Equity [Abstract]
Stock Repurchase Plan	Stock Repurchase Plan On February 26, 2015, the Company announced that the Board of Directors had authorized a stock repurchase plan under which the Company was authorized to repurchase up to $100 million of its common stock. As part of the repurchase plan, the Company repurchased 400,500 shares under this plan for a total of $24.2 million during 2016. All repurchased shares were subsequently cancelled. On July 26, 2016, the Board of Directors authorized a stock repurchase plan under which the Company was authorized to repurchase up to $100 million of its common stock. During the year ended December 31, 2018, the Company purchased 1,991,206 shares under the share repurchase plan for approximately $100 million. The repurchase plan was completed on October 19, 2018. All repurchased shares have been cancelled as of December 31, 2018. Refer to Item 5. Market for Registrant's Common Stock, Related Stockholder Matters and Issuer Purchases of Equity Securities for further discussion. No repurchases were made pursuant to this plan during 2017.