Basis of Presentation and Principles of Consolidation (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Summary of Revisions to Consolidated Financial Statements

A summary of the revisions to the consolidated financial statements as of June 30, 2012 and for the three and six months ended June 30, 2012 is as follows:

	As Previously Reported			Adjustment			As Revised
	June 30, 2012
Consolidated Balance Sheet
Accounts receivable, net of allowance	$	192,326		$	984		$	193,310
Inventories		180,815			(811	)		180,004
Deferred income tax assets—current		28,079			1,264			29,343
Income tax receivable		4,996			(476	)		4,520
Total current assets		429,443			961			430,404
Deferred income tax assets—noncurrent		19,917			(260	)		19,657
Total assets		538,522			701			539,223
Accounts payable		105,981			(1,396	)		104,585
Accrued liabilities		39,590			984			40,574
Total current liabilities		148,919			(412	)		148,507
Total liabilities		605,586			(412	)		605,174
Accumulated deficit		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit		(70,422	)		1,113			(69,309	)
Total deficit		(67,064	)		1,113			(65,951	)
Total liabilities and deficit		538,522			701			539,223
	Three Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	371,213		$	(1,355	)	$	369,858
Gross profit		45,766			1,355			47,121
Operating income		7,801			1,355			9,156
Loss before benefit from income taxes and equity income		(22,418	)		1,355			(21,063	)
Benefit from income taxes		(1,247	)		276			(971	)
Loss before equity income		(21,171	)		1,079			(20,092	)
Net loss		(20,970	)		1,079			(19,891	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(21,084	)		1,079			(20,005	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(1.00	)	$	0.05		$	(0.95	)

	As Previously Reported			Adjustment			As Revised
	Six Months Ended June 30, 2012
Consolidated Statement of Operations
Cost of sales	$	763,914		$	(619	)	$	763,295
Gross profit		96,456			619			97,075
Operating income		40,568			619			41,187
Income before provision for income taxes and equity income		289			619			908
Provision for income taxes		7,221			6			7,227
Loss before equity income		(6,932	)		613			(6,319	)
Net loss		(6,457	)		613			(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Net loss attributable to Global Brass and Copper Holdings, Inc. per common share:
Basic	$	(0.31	)	$	0.03		$	(0.28	)
	Three Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(20,970	)	$	1,079		$	(19,891	)
Comprehensive loss		(21,113	)		1,079			(20,034	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(21,232	)		1,079			(20,153	)
	Six Months Ended June 30, 2012
Consolidated Statement of Comprehensive Loss
Net loss	$	(6,457	)	$	613		$	(5,844	)
Comprehensive loss		(6,580	)		613			(5,967	)
Comprehensive loss attributable to Global Brass and Copper Holdings, Inc.		(6,770	)		613			(6,157	)
	Six Months Ended June 30, 2012
Consolidated Statement of Changes in Deficit
Net loss	$	(6,457	)	$	613		$	(5,844	)
Net loss attributable to Global Brass and Copper Holdings, Inc.		(6,625	)		613			(6,012	)
Accumulated deficit—Balance, June 30, 2012		(67,799	)		1,113			(66,686	)
Total Global Brass and Copper Holdings, Inc. stockholders’ deficit—Balance, June 30, 2012		(70,422	)		1,113			(69,309	)
Total deficit—Balance, June 30, 2012		(67,064	)		1,113			(65,951	)