CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING ACTIVITIES
Net loss	$ (7,407)	$ (6,103)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	24,258	24,164
Amortization of intangibles	1,136	987
Pension settlement expense	1,957	900
Share-based compensation expense	1,731	1,709
Provision for losses on accounts receivable	442	82
Deferred income tax provision (benefit)	(4,197)	5,212
Gain on sale of property and equipment	(613)	(311)
Changes in operating assets and liabilities:
Receivables	3,345	9,569
Prepaid expenses	(5,174)	(3,998)
Other assets	(3,357)	(2,954)
Income taxes	(1,205)	(10,211)
Accounts payable, accrued expenses, and other liabilities	(9,155)	(6,706)
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,761	12,340
INVESTING ACTIVITIES
Purchases of property, plant and equipment, net of financings	(12,273)	(13,357)
Proceeds from sale of property and equipment	1,692	2,435
Purchases of short-term investments	(6,223)	(15,745)
Proceeds from sale of short-term investments	6,125	7,840
Capitalization of internally developed software	(2,440)	(2,668)
NET CASH USED IN INVESTING ACTIVITIES	(13,119)	(21,495)
FINANCING ACTIVITIES
Payments on long-term debt	(17,297)	(11,066)
Net change in book overdrafts	(981)	(5,095)
Payment of common stock dividends	(2,066)	(2,088)
Purchases of treasury stock		(2,602)
Payments for tax withheld on share-based compensation	(325)	(178)
NET CASH USED IN FINANCING ACTIVITIES	(20,669)	(21,029)
NET DECREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	(32,027)	(30,184)
Cash and cash equivalents and restricted cash at beginning of period	115,242	166,357
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	83,215	136,173
NONCASH INVESTING ACTIVITIES
Equipment financed	694	1,947
Accruals for equipment received	$ 440	$ 8,486