Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unrealized gain (loss) on derivatives, tax expense (benefit)	$ (1,400)	$ 3,100
Repurchase of treasury shares, shares	5,615,874	3,654,816
Accumulated Other Comprehensive (Loss) Income [Member]
Unrealized gain (loss) on derivatives, tax expense (benefit)	$ (1,421)	$ 3,111	$ 5,735