Consolidated Statements of Earnings (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Reclassifications adjustment for realized gains on investment securities included in net earnings (loss), before income tax	$ 1,075	$ 239	$ 1,825	$ 1,153
Income tax expense from reclassification items	$ 376	$ 84	$ 639	$ 404