CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUES	$ 787,563	$ 826,158	$ 2,270,892	$ 2,319,509
OPERATING EXPENSES	756,355	770,103	2,195,893	2,247,573
OPERATING INCOME	31,208	56,055	74,999	71,936
OTHER INCOME (COSTS)
Interest and dividend income	1,768	1,120	4,862	2,360
Interest and other related financing costs	(2,900)	(2,470)	(8,593)	(6,542)
Other, net	(6,734)	(714)	(7,770)	(4,038)
TOTAL OTHER INCOME (COSTS)	(7,866)	(2,064)	(11,501)	(8,220)
INCOME BEFORE INCOME TAXES	23,342	53,991	63,498	63,716
INCOME TAX PROVISION	7,072	13,215	17,964	11,753
NET INCOME	$ 16,270	$ 40,776	$ 45,534	$ 51,963
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.64	$ 1.58	$ 1.78	$ 2.02
Diluted (in dollars per share)	$ 0.62	$ 1.52	$ 1.72	$ 1.94
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	25,527,982	25,697,509	25,550,365	25,670,435
Diluted (in shares)	26,416,595	26,795,659	26,461,668	26,708,259
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.08	$ 0.08	$ 0.24	$ 0.24