Stockholders' Equity (Notes)	3 Months Ended
Mar. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	17. Stockholders’ Equity Stock Repurchase Program On September 25, 2017, the Company announced that its board of directors authorized the repurchase of issued and outstanding shares of the Company’s common stock having an aggregate value of up to $25.0 million pursuant to a share repurchase program. The repurchases under the share repurchase program were made from time to time in the open market or in privately negotiated transactions and were funded from the Company’s working capital. All shares of common stock repurchased under this share repurchase program were retired and restored to authorized but unissued shares of common stock. The Company repurchased 8.7 million shares of its common stock under the share repurchase program during the fiscal year ended December 31, 2018, for an aggregate purchase price of $25.0 million, or an average cost of $2.86 per share, including trading commissions. On September 24, 2018, the Company announced that its board of directors authorized the repurchase of issued and outstanding shares of the Company’s common stock having an aggregate value of up to $100.0 million pursuant to a share repurchase program. Repurchases under the share repurchase program will be made from time to time in the open market or in privately negotiated transactions and funded from the Company’s working capital. The amount and timing of such repurchases will depend upon the price and availability of shares, general market conditions and the availability of cash. Repurchases may also be made under a trading plan under Rule 10b5-1, which would permit shares to be repurchased when the Company might otherwise be precluded from doing so because of self-imposed trading blackout periods or other regulatory restrictions. All shares of common stock repurchased under this share repurchase program are expected to be retired and restored to authorized but unissued shares of common stock. The Company repurchased 13.1 million shares of its common stock under this share repurchase program during the three months ended March 31, 2019, for an aggregate purchase price of $44.4 million, or an average cost of $3.38 per share, including trading commissions. Since the inception of this share repurchase program through March 31, 2019, the Company has repurchased 21.8 million shares for an aggregate purchase price of $69.9 million, or an average cost of $3.21 per share, including trading commissions. The program may be suspended or discontinued at any time without notice. As of March 31, 2019, the Company had 400,000 shares held in treasury stock at a total cost of $1.5 million. Those shares were settled and retired on April 5, 2019.

17. Stockholders’ Equity

Stock Repurchase Program

On September 25, 2017, the Company announced that its board of directors authorized the repurchase of issued and outstanding shares of the Company’s common stock having an aggregate value of up to $25.0 million pursuant to a share repurchase program. The repurchases under the share repurchase program were made from time to time in the open market or in privately negotiated transactions and were funded from the Company’s working capital. All shares of common stock repurchased under this share repurchase program were retired and restored to authorized but unissued shares of common stock. The Company repurchased 8.7 million shares of its common stock under the share repurchase program during the fiscal year ended December 31, 2018, for an aggregate purchase price of $25.0 million, or an average cost of $2.86 per share, including trading commissions.

On September 24, 2018, the Company announced that its board of directors authorized the repurchase of issued and outstanding shares of the Company’s common stock having an aggregate value of up to $100.0 million pursuant to a share repurchase program. Repurchases under the share repurchase program will be made from time to time in the open market or in privately negotiated transactions and funded from the Company’s working capital. The amount and timing of such repurchases will depend upon the price and availability of shares, general market conditions and the availability of cash. Repurchases may also be made under a trading plan under Rule 10b5-1, which would permit shares to be repurchased when the Company might otherwise be precluded from doing so because of self-imposed trading blackout periods or other regulatory restrictions. All shares of common stock repurchased under this share repurchase program are expected to be retired and restored to authorized but unissued shares of common stock. The Company repurchased 13.1 million shares of its common stock under this share repurchase program during the three months ended March 31, 2019, for an aggregate purchase price of $44.4 million, or an average cost of $3.38 per share, including trading commissions. Since the inception of this share repurchase program through March 31, 2019, the Company has repurchased 21.8 million shares for an aggregate purchase price of $69.9 million, or an average cost of $3.21 per share, including trading commissions. The program may be suspended or discontinued at any time without notice. As of March 31, 2019, the Company had 400,000 shares held in treasury stock at a total cost of $1.5 million. Those shares were settled and retired on April 5, 2019.