Significant Acquisition Costs included in the accompanying Condensed Consolidated Statements of Operations are as follows:



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2018		2017		2018
Cost of sales (excluding depreciation and amortization)	$	5,073	$	1,827	$	12,960	$	2,123
Selling, general and administrative expenses	14,904		8,594		27,588		27,306
Total Significant Acquisition Costs	$	19,977	$	10,421	$	40,548	$	29,429

Significant Acquisition Costs included in the accompanying Condensed Consolidated Statements of Operations by segment are as follows:



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2018		2017		2018
North American Records and Information Management Business	$	6,326	$	3,017	$	13,625	$	3,601
North American Data Management Business	938		351		1,683		351
Western European Business	2,131		1,427		5,347		3,579
Other International Business	1,937		896		3,588		1,433
Global Data Center Business	—		1,159		—		11,340
Corporate and Other Business	8,645		3,571		16,305		9,125
Total Significant Acquisition Costs	$	19,977	$	10,421	$	40,548	$	29,429

A rollforward of accrued liabilities related to Significant Acquisition Costs on our Condensed Consolidated Balance Sheets as of December 31, 2017 to June 30, 2018 is as follows:



	Accrual for Significant Acquisition Costs
Balance at December 31, 2017	$	12,622
Amounts accrued	2,437
Change in estimates(1)	(64		)
Payments	(8,593		)
Currency translation adjustments	(7		)
Balance at June 30, 2018(2)	$	6,395

_______________________________________________________________________________


(1)	Includes adjustments made to amounts accrued in a prior period.

(2)

Accrued liabilities related to Significant Acquisition Costs as of June 30, 2018 presented in the table above generally related to employee severance costs and onerous lease liabilities associated with the Recall Transaction. We expect that the majority of these liabilities will be paid in 2018. Additional Significant Acquisition Costs recorded in our Condensed Consolidated Statement of Operations for the three and six months ended June 30, 2018 have either been settled in cash during such periods or are included in our Condensed Consolidated Balance Sheet as of June 30, 2018 as a component of accounts payable.