Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - shares shares in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Activity in employee compensation plans (shares)	1,412,387	1,166,227

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration