CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 66,244	$ 146,699	$ 34,147
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Depreciation and amortization	53,233	48,455	40,329
Loss on disposal of assets	1,992	1,500	1,529
Deferred income taxes	9,558	(7,513)	11,534
Stock based compensation	10,131	7,742	1,327
Accretion of deferred financing fees	1,802	592	148
Changes in assets and liabilities:
Accounts and other receivables	35,712	(64,320)	(3,948)
Inventories	(7,974)	(230)	21,253
Accounts payable	69	8,172	23,846
Income taxes payable	2,211	(85)	86
Accrued liabilities	(6,111)	9,617	281
Deferred income and customer advances	5,362	(8,373)	360
Other assets and liabilities	1,156	(7,649)	(17,152)
Net cash provided by operating activities	173,385	134,607	113,740
Cash flows from investing activities:
Expenditures for property, plant and equipment	(109,215)	(86,438)	(84,009)
Other investing activities	(2,976)	(6,809)	(2,372)
Net cash used for investing activities	(112,191)	(93,247)	(86,381)
Cash flows from financing activities:
Proceeds from long-term debt	0	0	270,000
Payments of long-term debt	(266,625)	0	(3,375)
Payment of debt issuance costs	0	0	(1,881)
Borrowings from line of credit	345,000	308,500	58,000
Payments of line of credit	(145,000)	(308,500)	(58,000)
Payment of line of credit facility fees	(1,361)	0	(1,080)
Principal payments of capital leases	(308)	(127)	(165)
Purchase of treasury shares	(38,524)	0	0
Distribution to Honeywell in connection with the Spin-Off	0	0	(269,347)
Net decrease in invested equity	0	0	(7,312)
Net cash used for financing activities	(106,818)	(127)	(13,160)
Net change in cash and cash equivalents	(45,624)	41,233	14,199
Cash and cash equivalents at beginning of year	55,432	14,199	0
Cash and cash equivalents at the end of year	9,808	55,432	14,199
Supplemental non-cash investing activities:
Capital expenditures included in accounts payable	27,258	25,222	28,485
Supplemental cash investing activities:
Cash paid for interest	5,855	7,236	1,862
Cash paid for income taxes	$ 7,315	$ 12,982	$ 0