Consolidated Statements of Shareholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Purchase of treasury stock (in shares)	111,754	304,512	178,243
Restricted share units converted to common stock (in shares)	52,173