Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Data

	2018												2017
	4th			3rd			2nd			1st			4th			3rd			2nd			1st
Total revenues		$28,341			$25,146			$24,258			$23,382			$24,770			$24,223			$23,051			$21,961
Total costs and expenses	(22,090		)	(21,040		)	(19,536		)	(18,824		)	(19,881		)	(19,956		)	(18,702		)	(18,073		)
Earnings from operations	4,175			2,227			2,710			2,875			2,978			2,630			2,530			2,206
Net earnings	3,424			2,363			2,196			2,477			3,320			1,810			1,749			1,579
Basic earnings per share	6.00			4.11			3.77			4.19			5.57			3.03			2.91			2.57
Diluted earnings per share	5.93			4.07			3.73			4.15			5.49			2.99			2.87			2.54