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Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event Dividend Declaration In January 2019, we announced that our Board of Directors declared a $0.10 per share cash dividend for stockholders of record on February 6, 2019, and payable on February 20, 2019. Any future dividends that may be declared and paid from time to time will be subject to market and economic conditions, applicable legal requirements and other relevant factors. We are not obligated to continue a dividend for any fixed period, and the payment of dividends may be suspended or discontinued at any time at our discretion and without prior notice.