Note 17 - Summary of Quarterly Operating Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Quarterly Financial Information [Table Text Block]

	(Unaudited) Year Ended December 31, 2019
(dollars in thousands, except per share amounts)	First Quarter (1)		Second Quarter (2)		Third Quarter (2)		Fourth Quarter (3)
Revenues	$	278,605	$	285,650	$	284,991	$	318,751
Total costs and expenses	$	210,908	$	211,536	$	204,858	$	230,244
Income from operations	$	67,697	$	74,114	$	80,133	$	88,507
Net income	$	38,739	$	36,395	$	49,835	$	53,613
Net Income per Common Share:
Basic	$	6.83	$	6.41	$	8.77	$	9.43
Diluted	$	6.78	$	6.35	$	8.68	$	9.32
Weighted Average Common Shares Outstanding:
Basic		5,674,120		5,673,669		5,682,167		5,685,840
Diluted		5,716,585		5,730,238		5,741,666		5,751,970

	(Unaudited) Year Ended December 31, 2018
(dollars in thousands, except per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Revenues	$	265,761	$	268,414	$	268,268	$	269,852
Total costs and expenses	$	201,100	$	197,746	$	204,949	$	200,588
Income from operations	$	64,661	$	70,668	$	63,319	$	69,264
Net income	$	40,653	$	43,785	$	38,314	$	42,008
Net Income per Common Share:
Basic	$	7.13	$	7.70	$	6.75	$	7.40
Diluted	$	7.08	$	7.65	$	6.70	$	7.34
Weighted Average Common Shares Outstanding:
Basic		5,702,539		5,687,095		5,674,224		5,674,067
Diluted		5,742,648		5,722,869		5,717,575		5,723,528