CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUES	$ 720,368	$ 676,627	$ 1,371,456	$ 1,298,082
OPERATING EXPENSES	695,634	659,973	1,358,975	1,290,693
OPERATING INCOME	24,734	16,654	12,481	7,389
OTHER INCOME (COSTS)
Interest and dividend income	285	387	559	788
Interest and other related financing costs	(1,389)	(1,231)	(2,704)	(2,478)
Other, net	505	571	1,152	937
TOTAL OTHER COSTS	(599)	(273)	(993)	(753)
INCOME BEFORE INCOME TAXES	24,135	16,381	11,488	6,636
INCOME TAX PROVISION	8,358	6,150	3,118	2,508
NET INCOME	$ 15,777	$ 10,231	$ 8,370	$ 4,128
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.61	$ 0.39	$ 0.32	$ 0.16
Diluted (in dollars per share)	$ 0.60	$ 0.39	$ 0.32	$ 0.16
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	25,767,791	25,791,026	25,726,363	25,806,774
Diluted (in shares)	26,291,641	26,246,868	26,378,436	26,295,683
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.08	$ 0.08	$ 0.16	$ 0.16