Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Purchases, shares	501,735
TREASURY STOCK, AT COST:
Purchases, shares	500,000	260,000
RETAINED EARNINGS:
Cash dividends declared on common stock, per share	$ 0.32	$ 0.25