Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 12,175	$ 18,288
Receivables, net of allowance of $9,990 and $15,182	[1]	245,617	268,352
Inventory		39,195	48,540
Income tax receivable		316	331
Prepaid expenses and other current assets		20,275	19,445
Total current assets		317,578	354,956
Property, plant and equipment, net		191,951	194,794
Intangible assets, net of accumulated amortization of $96,797 and $82,406		117,019	131,372
Operating lease right-of-use assets		67,048
Goodwill		282,006	281,650
Other assets, net		4,426	7,397
Deferred income taxes		5,189	7,652
Total assets		985,217	977,821
Current liabilities:
Current portion of long-term debt and finance lease obligations		5,294	569
Current portion of operating lease obligations		17,100
Accounts payable		41,636	44,074
Other accrued liabilities		86,506	95,308
Total current liabilities		150,536	139,951
Deferred income taxes		6,996	6,106
Long-term debt and finance lease obligations		325,299	356,814
Operating lease obligations (non-current)		54,436
Defined benefit pension liability		9,321	10,940
Other long-term liabilities		1,959	6,910
Total liabilities		548,547	520,721
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; 30,518,793 and 30,184,330 shares issued		9,153	9,053
Additional paid-in capital		409,034	400,989
Retained earnings		48,673	81,450
Accumulated other comprehensive loss		(30,190)	(34,392)
Total equity		436,670	457,100
Total liabilities and equity		$ 985,217	$ 977,821

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