Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 23,334	$ 46,360
Short-term investments	750	750
Accounts receivable, net	197,522	160,167
Inventories	183,264	173,999
Income taxes receivable	10,075	6,929
Other current assets	33,853	29,178
Total current assets	448,798	417,383
Property, plant and equipment, net	552,152	536,686
Deferred income tax assets, net	56,953	54,302
Goodwill	312,441	304,805
Intangibles	201,559	203,473
Other non-current assets	45,898	34,603
Total assets	1,617,801	1,551,252
Current liabilities:
Accounts payable	127,330	118,424
Short term debt	3,280	4,000
Accrued expenses	75,968	68,786
Income taxes payable	1,703	3,849
Total current liabilities	208,281	195,059
Long-term debt (less current portion)	687,120	679,552
Embedded derivative liability	3,787	4,685
Non-current income tax liabilities	14,834	5,731
Deferred income tax liabilities, net	29,268	28,539
Other non-current liabilities	45,817	47,269
Mezzanine equity:
Preferred stock, $.01 par value Authorized - 1,000,000 shares; issued and outstanding - 150,000 shares (150,000 shares at December 31, 2017)	148,863	144,694
Uniwheels noncontrolling redeemable equity	55,551
Shareholders' equity:
Common stock, $.01 par value Authorized-100,000,000 shares; issued and outstanding - 24,984,791 shares (24,917,025 shares at December 31, 2017)	86,259	89,755
Accumulated other comprehensive loss	(54,220)	(89,121)
Retained earnings	392,241	393,146
Superior shareholders' equity	424,280	393,780
Noncontrolling interests		51,943
Total shareholders' equity	424,280	445,723
Total liabilities, mezzanine and shareholders' equity	$ 1,617,801	$ 1,551,252