Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents		$ 12,750	$ 18,288
Receivables, net of allowance of $14,431 and $15,182	[1]	265,104	268,352
Inventory		46,037	48,540
Income tax receivable		3,919	331
Prepaid expenses and other current assets		24,408	19,445
Total current assets		352,218	354,956
Property, plant and equipment, net		192,819	194,794
Intangible assets, net of accumulated amortization of $89,713 and $82,406		124,125	131,372
Operating lease right-of-use assets		66,500	0
Goodwill		282,156	281,650
Other assets, net		6,474	7,397
Deferred income taxes		7,585	7,652
Total assets		1,031,877	977,821
Current liabilities:
Current portion of long-term debt and finance lease obligations		279	569
Current portion of operating lease obligations		17,314	0
Accounts payable		49,888	44,074
Other accrued liabilities		79,845	95,308
Total current liabilities		147,326	139,951
Deferred income taxes		8,221	6,106
Long-term debt and finance lease obligations		363,491	356,814
Operating lease obligations		53,945	0
Defined benefit pension liability		9,749	10,940
Other long-term liabilities		2,046	6,910
Total liabilities		584,778	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; 30,293,191 and 30,184,330 shares issued, respectively		9,086	9,053
Additional paid-in capital		406,688	400,989
Retained earnings		62,881	81,450
Accumulated other comprehensive loss		(31,556)	(34,392)
Total equity		447,099	457,100
Total liabilities and equity		$ 1,031,877	$ 977,821

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