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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
OPERATING ACTIVITIES    
Net income $ 11,187 $ 8,370
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 51,409 48,332
Amortization of intangibles 2,264 2,271
Pension settlement expense 1,085 2,701
Share-based compensation expense 3,544 3,599
Provision for losses on accounts receivable 1,069 1,053
Deferred income tax benefit (10,818) 2,687
Gain on sale of property and equipment (166) (412)
Changes in operating assets and liabilities:    
Receivables (31,281) (21,091)
Prepaid expenses 2,393 (2,549)
Other assets 2,018 (3,100)
Income taxes 8,024 458
Multiemployer pension fund withdrawal liability 37,922  
Accounts payable, accrued expenses, and other liabilities 40,914 9,007
NET CASH PROVIDED BY OPERATING ACTIVITIES 119,564 51,326
INVESTING ACTIVITIES    
Purchases of property, plant and equipment, net of financings (24,763) (27,123)
Proceeds from sale of property and equipment 2,074 2,751
Purchases of short-term investments (26,006) (6,223)
Proceeds from sale of short-term investments 14,647 9,065
Capitalization of internally developed software (5,997) (4,323)
NET CASH USED IN INVESTING ACTIVITIES (40,045) (25,853)
FINANCING ACTIVITIES    
Borrowings under accounts receivable securitization program   10,000
Payments on long-term debt (33,694) (34,948)
Net change in book overdrafts (2,888) (2,478)
Deferred financing costs   (275)
Payment of common stock dividends (4,116) (4,144)
Purchases of treasury stock (201) (3,611)
Payments for tax withheld on share-based compensation (85) (2,690)
NET CASH USED IN FINANCING ACTIVITIES (40,984) (38,146)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH 38,535 (12,673)
Cash and cash equivalents and restricted cash at beginning of period 120,772 115,242
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD 159,307 102,569
NONCASH INVESTING ACTIVITIES    
Equipment financed 14,407 38,593
Accruals for equipment received $ 8,649 $ 3,179