CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUES	$ 744,280	$ 713,923	$ 2,115,736	$ 2,012,005
OPERATING EXPENSES	719,931	693,553	2,078,906	1,984,246
OPERATING INCOME	24,349	20,370	36,830	27,759
OTHER INCOME (COSTS)
Interest and dividend income	346	390	905	1,178
Interest and other related financing costs	(1,706)	(1,296)	(4,410)	(3,774)
Other, net	1,079	1,091	2,231	2,028
TOTAL OTHER INCOME (COSTS)	(281)	185	(1,274)	(568)
INCOME BEFORE INCOME TAXES	24,068	20,555	35,556	27,191
INCOME TAX PROVISION	9,280	7,615	12,398	10,123
NET INCOME	$ 14,788	$ 12,940	$ 23,158	$ 17,068
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.57	$ 0.50	$ 0.90	$ 0.66
Diluted (in dollars per share)	$ 0.56	$ 0.49	$ 0.87	$ 0.64
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	25,671,535	25,724,550	25,699,306	25,779,166
Diluted (in shares)	26,393,359	26,211,524	26,373,382	26,263,732
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.08	$ 0.08	$ 0.24	$ 0.24