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Condensed Parent Company Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Interest expense	$ (33,903)	$ (23,777)	$ (12,671)
Net income	92,046	89,289	45,972
Parent Company
Condensed Financial Statements, Captions [Line Items]
Dividends from wholly-owned subsidiaries	29,800	15,525	52,732
Earnings of wholly-owned subsidiaries, net of dividends	65,555	77,050	(4,793)
Interest expense	(2,648)	(2,498)	(1,867)
All other income and expenses, net	(661)	(788)	(100)
Net income	$ 92,046	$ 89,289	$ 45,972

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