Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 15,955		$ 26,552
Receivables, net of allowance of $18,415 and $11,308	301,912	[1]	301,963
Inventory	51,559		49,703
Income tax receivable	0		892
Prepaid expenses and other current assets	25,129		17,950
Total current assets	394,555		397,060
Property, plant and equipment, net	193,412		203,219
Intangible assets, net of accumulated amortization of $75,349 and $54,184	138,629		160,161
Goodwill	283,070		284,804
Other assets, net	7,602		5,798
Deferred income taxes	5,307		4,793
Total assets	1,022,575		1,055,835
Current liabilities:
Accounts payable	48,433		55,312
Other accrued liabilities	100,032		92,472
Income taxes payable	2,469		0
Total current liabilities	150,934		147,784
Deferred income taxes	37,409		38,100
Long-term debt	376,958		387,749
Defined benefit pension liability	11,645		14,976
Other long-term liabilities	9,181		9,758
Total liabilities	586,127		598,367
Commitments and contingencies
Equity:
Preferred stock, 500,000 shares authorized, none issued	0		0
Common stock, par value $0.30 per share, 60,000,000 shares authorized; 30,023,232 and 29,953,041 shares issued	9,005		8,984
Additional paid-in capital	399,163		352,500
Retained earnings	51,039		115,780
Accumulated other comprehensive loss	(22,759)		(19,796)
Total equity	436,448		457,468
Total liabilities and equity	$ 1,022,575		$ 1,055,835

[1] Includes billed and unbilled amounts, net of allowance for doubtful accounts. See Note 3 for details.