Supplemental Condensed Consolidated Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of Restricted Cash Classified Within Current Assets

As of March 31, 2018, December 31, 2017, and March 31, 2017, cash, cash equivalents, and restricted cash consisted of the following (in thousands of dollars):

	March 31, 2018		December 31, 2017		March 31, 2017
Cash and cash equivalents	$	335,728	$	544,432	$	514,857
Restricted cash, recorded within current assets:
Consignor funds held in legally segregated accounts	11,192		46,029		7,243
Funds deposited with the trustee for the redemption of the 2022 Senior Notes (see Note 8)	—		312,250		—
Cash Management Account related to the York Property Mortgage (see Note 8)	4,290		3,107		6,092
Other	200		192		660
Restricted cash, recorded within current assets	15,682		361,578		13,995
Restricted cash, recorded within other long-term assets (a)	18,662		17,916		16,559
Total restricted cash	34,344		379,494		30,554
Cash, cash equivalents, and restricted cash	$	370,072	$	923,926	$	545,411

(a) Restricted cash reflected within Other Long-Term Assets principally relates to $15.3 million of funds held in escrow pending the final settlement of a sale.

Supplemental Condensed Consolidated Cash Flow Information

For the three months ended March 31, 2018 and 2017, changes in other operating assets and liabilities as reported in the Condensed Consolidated Statements of Cash Flows included the following (in thousands of dollars):

	Three Months Ended March 31,
	2018			2017
Increase in:
Prepaid expenses and other current assets	$	(2,588	)	$	(6,362	)
Other long-term assets	(3,773		)	(3,931		)
Income tax receivables and deferred income tax assets	(12,579		)	(14,597		)
Decrease in:
Accounts payable and accrued liabilities and other liabilities	(57,419		)	(51,114		)
Accrued income taxes and deferred income tax liabilities	555			(22,654		)
Total changes in other operating assets and liabilities	$	(75,804	)	$	(98,658	)