CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUES	$ 713,923	$ 709,380	$ 2,012,005	$ 2,018,771
OPERATING EXPENSES	693,553	675,942	1,984,246	1,950,588
OPERATING INCOME	20,370	33,438	27,759	68,183
OTHER INCOME (COSTS)
Interest and dividend income	390	378	1,178	882
Interest and other related financing costs	(1,296)	(1,157)	(3,774)	(3,183)
Other, net	1,091	(613)	2,028	(15)
TOTAL OTHER INCOME (COSTS)	185	(1,392)	(568)	(2,316)
INCOME BEFORE INCOME TAXES	20,555	32,046	27,191	65,867
INCOME TAX PROVISION	7,615	12,892	10,123	26,001
NET INCOME	$ 12,940	$ 19,154	$ 17,068	$ 39,866
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 0.50	$ 0.73	$ 0.66	$ 1.52
Diluted (in dollars per share)	$ 0.49	$ 0.72	$ 0.64	$ 1.48
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	25,724,550	26,009,344	25,779,166	26,033,467
Diluted (in shares)	26,211,524	26,508,482	26,263,732	26,569,800
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.08	$ 0.06	$ 0.24	$ 0.18