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Stockholders' Equity	12 Months Ended
Stockholders' Equity	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	22. Stockholders' Equity Share Repurchases In February 2018, the Company's Board of Directors approved a standing share repurchase authorization, whereby the Company was authorized to repurchase up to 20 million shares of its common stock through December 31, 2020. The Company suspended share repurchases in the second quarter of 2020 due to business uncertainty related to COVID-19. This temporary suspension in share repurchases was lifted during the beginning of the third quarter. During the year ended December 31, 2020 and 2019 the Company repurchased 979,165 and 1,343,622 shares of common stock at a total cost of $106,279 and $143,280 or $108.54 and $106.64 per share, respectively. Upon expiration of the February 2018 share repurchase authorization on December 31, 2020, there were 7,380,879 shares remaining. In November 2020, the Company's Board of Directors approved a new standing share repurchase authorization, whereby the Company may repurchase up to 20 million shares beginning on January 1, 2021 through December 31, 2023.