Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 15,296		$ 26,552
Receivables, net of allowance of $15,352 and $11,308	323,169	[1]	301,963
Inventory	52,495		49,703
Income tax receivable	0		892
Prepaid expenses and other current assets	30,418		17,950
Total current assets	421,378		397,060
Property, plant and equipment, net	195,762		203,219
Intangible assets, net of accumulated amortization of $68,230 and $54,184	145,781		160,161
Goodwill	283,090		284,804
Other assets, net	6,617		5,798
Deferred income taxes	5,462		4,793
Total assets	1,058,090		1,055,835
Current liabilities:
Accounts payable	51,813		55,312
Other accrued liabilities	94,843		92,472
Income taxes payable	742		0
Total current liabilities	147,398		147,784
Deferred income taxes	42,302		38,100
Long-term debt	390,481		387,749
Defined benefit pension liability	12,725		14,976
Other long-term liabilities	9,053		9,758
Total liabilities	601,959		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; 30,019,135 and 29,953,041 shares issued	9,004		8,984
Additional paid-in capital	396,800		352,500
Retained earnings	73,901		115,780
Accumulated other comprehensive loss	(23,574)		(19,796)
Total equity	456,131		457,468
Total liabilities and equity	$ 1,058,090		$ 1,055,835

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