CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Accounts Receivable, Allowance for Credit Loss, Current	$ 3,907	$ 3,705
Shareholders' equity:
Common shares, authorized (in shares)	65,000	65,000
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Common shares, outstanding (in shares)	46,144	46,391