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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend On February 5, 2018, the Board of Directors declared a quarterly cash dividend of $0.47 per share of common stock, which is to be paid on February 27, 2018 to shareholders of record as of the close of business on February 16, 2018. Stock Buyback Program On February14, 2018, the Company announced that its Board of Directors authorized a stock buyback program authorizing the Company to repurchase up to a maximum of $200.0 million of its shares of common stock. The program shall be effective through October 20, 2020. The stock buyback program is intended to be implemented through purchases made from time to time in the open market or in privately negotiated transactions, in accordance with applicable Securities and Exchange Commission requirements. The stock buyback program does not obligate us to purchase any specific amount of our common stock and may be suspended or extended at any time at the discretion of our Board of Directors.