Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock Issued During Period, Shares, New Issues	0	787,547	0
Activity in employee compensation plans (shares)	1,175,466	598,269	1,081,217
Other comprehensive income (loss), tax	$ (181)	$ 39	$ 0