Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

(21)          Quarterly Financial Data (Unaudited)

Our quarterly financial information has not been audited, but, in management's opinion, includes all adjustments necessary for a fair presentation. Our business is seasonal in nature with the peak sales periods generally occurring during the summer and winter months. Accordingly, comparisons among quarters of a year may not represent overall trends and changes in operations. Amounts presented are in thousands, except per share data:

2019	First		Second		Third		Fourth
Operating revenues	$	384,220	$	270,719	$	274,836	$	328,135
Operating income	97,020		48,823		46,356		84,651
Net income	$	72,806	$	47,662	$	21,670	$	59,982
Average common shares outstanding	50,381		50,441		50,444		50,448
Income per average common share:
Basic	$	1.45	$	0.94	$	0.43	$	1.19
Diluted	$	1.44	$	0.94	$	0.42	$	1.18

2018	First		Second		Third		Fourth
Operating revenues	$	341,502	$	261,817	$	279,874	$	308,816
Operating income	84,512		69,210		47,808		64,742
Net income	$	58,499	$	43,787	$	28,182	$	66,492
Average common shares outstanding	49,416		49,869		50,318		50,321
Income per average common share:
Basic	$	1.18	$	0.88	$	0.56	$	1.32
Diluted	$	1.18	$	0.87	$	0.56	$	1.31