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CONSOLIDATED STATEMENTS OF CASH FLOW (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
OPERATING ACTIVITIES |  |  |  |
Net income | $ 1,233 | $ 10,101 | $ 12,207 | $ 23,417
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation | 15,201 | 15,142 | 29,845 | 28,266
Amortization | 2,632 | 2,817 | 5,281 | 4,513
Change in other noncurrent liabilities | (758) | (3,371) | (2,354) | (4,735)
Change in deferred taxes and other liabilities | (6,745) | (1,457) | (7,357) | 1,072
Provision for write-off of property, plant and equipment | 534 | 484 | 830 | 1,076
Non-cash interest expense | 212 |  | 423 |
Compensation and benefits paid or payable in Class A Common Stock | 681 | 668 | 1,670 | 1,532
Changes in operating assets and liabilities that provided/(used) cash, net of impact of business acquisition: |  |  |  |
Accounts receivable | (14,395) | (10,384) | (15,136) | (11,286)
Inventories | 1,655 | (6,027) | (13,266) | (7,375)
Prepaid expenses and other current assets | (651) | 2,561 | (2,568) | (2,821)
Income taxes prepaid and receivable | (2,817) | 3,732 | (2,817) | 1,837
Accounts payable | (1,459) | 1,267 | 2,065 | 2,899
Accrued liabilities | 10,071 | 689 | (900) | (8,154)
Income taxes payable | 1,978 | 2,903 | (508) | (933)
Contract receivables | (3,621) | (7,768) | (7,536) | (7,768)
Other, net | 4,638 | 7,291 | 3,938 | 2,490
Net cash provided by operating activities | 8,389 | 18,648 | 3,817 | 24,030
INVESTING ACTIVITIES |  |  |  |
Purchase of business, net of cash acquired |  | (187,000) |  | (187,000)
Purchases of property, plant and equipment | (21,360) | (20,112) | (46,405) | (28,105)
Purchased software | (353) | (589) | (391) | (671)
Proceeds from sale or involuntary conversion of assets |  | 1,736 |  | 1,736
Net cash used in investing activities | (21,713) | (205,965) | (46,796) | (214,040)
FINANCING ACTIVITIES |  |  |  |
Proceeds from borrowings | 16,114 | 207,134 | 32,259 | 219,530
Principal payments on debt | (540) | (426) | (21,142) | (22,824)
Debt acquisition costs |  | (1,571) |  | (1,771)
Swap termination payment |  | (5,175) |  | (5,175)
Taxes paid in lieu of share issuance |  |  | (1,364) | (1,272)
Proceeds from options exercised | 100 | 185 | 175 | 390
Dividends paid | (5,467) | (5,454) | (10,926) | (10,897)
Net cash (used in)/provided by financing activities | 10,207 | 194,693 | (998) | 177,981
Effect of exchange rate changes on cash and cash equivalents | (1,424) | (966) | 1,027 | 2,941
(Decrease)/increase in cash and cash equivalents | (4,541) | 6,410 | (42,950) | (9,088)
Cash and cash equivalents at beginning of period | 143,333 | 169,615 | 181,742 | 185,113
Cash and cash equivalents at end of period | $ 138,792 | $ 176,025 | $ 138,792 | $ 176,025

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