CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 106,545	$ 89,456
Current restricted cash	54,217	84,991
Accounts receivable – trade, net of allowance for credit losses of $2.7 million and $2.1 million as of March 31, 2026 and December 31, 2025, respectively	126,357	118,383
Contracts in progress	90,854	72,808
Inventories, net	60,735	60,880
Customer contract asset current	10,537	8,268
Other current assets	42,027	35,890
Total current assets	491,272	470,676
Net property, plant and equipment and finance leases	70,839	65,533
Goodwill	52,693	53,097
Intangible assets, net	14,339	15,267
Right-of-use assets	16,595	17,651
Long-term restricted cash	34,071	26,913
Deferred tax assets	931	945
Customer contract asset noncurrent	60,936	0
Other assets	16,169	12,856
Total assets	757,845	662,938
Accounts payable	108,753	69,192
Accrued employee benefits	10,624	4,575
Advance billings on contracts	106,466	111,987
Accrued warranty expense	3,488	3,584
Financing lease liabilities	1,987	1,894
Operating lease liabilities	3,613	3,819
Customer warrants	142,779	8,268
Other accrued liabilities	46,998	32,129
Current senior notes	69,101	83,873
Current borrowings	710	67,373
Total current liabilities	494,519	386,694
Borrowings, net of current portion	56,826	18,865
Senior Notes due 2030	149,269	150,970
Pension and other postretirement benefit liabilities	168,861	176,191
Finance lease liabilities, net of current portion	26,317	26,742
Operating lease liabilities, net of current portion	14,156	15,125
Deferred tax liability	10,579	10,666
Other noncurrent liabilities	9,413	9,226
Total liabilities	929,940	794,479
Stockholders' deficit:
Preferred Stock, par value $0.01 per share, authorized shares of 20,000; issued and outstanding shares of 7,669 at March 31, 2026 and December 31, 2025	77	77
Common stock, par value $0.01 per share, authorized shares of 500,000; issued and outstanding shares of 135,747 and 130,447 at March 31, 2026 and December 31, 2025, respectively	5,682	5,569
Capital in excess of par value	1,738,493	1,691,412
Treasury stock at cost, 3,204 and 2,690 shares at March 31, 2026 and December 31, 2025, respectively	(122,058)	(115,886)
Accumulated deficit	(1,777,395)	(1,696,735)
Accumulated other comprehensive loss	(16,894)	(15,978)
Total stockholders' deficit	(172,095)	(131,541)
Total liabilities and stockholders' deficit	$ 757,845	$ 662,938

Cash And Cash Equivalents, Continuing Operations

No definition available.

Name:	bw_CashAndCashEquivalentsContinuingOperations
Namespace Prefix:	bw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).