CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows Provided by Operating Activities from Continuing Operations
Net income from continuing operations	$ 52.0	$ 45.8	$ 70.5
Reconciling adjustments:
Depreciation and amortization	72.5	71.6	70.8
Deferred income taxes	(8.8)	(5.0)	3.4
(Gain)/loss on disposal of property	(1.2)	(0.8)	0.3
Post-retirement expense	2.6	4.5	1.4
Share-based compensation expense	4.0	2.7	2.6
Equity in income of terminal joint venture	(3.2)	(8.6)	(12.8)
Dividend from terminal joint venture		5.3	7.0
Impairment on long-lived intangible assets	2.1
Changes in assets and liabilities:
Accounts receivable	(7.0)	(10.8)	5.2
Deferred dry-docking payments	(44.8)	(36.0)	(5.9)
Deferred dry-docking amortization	23.3	22.7	19.6
Prepaid expenses and other assets	(10.4)	(3.4)	(1.1)
Accounts payable and accrued liabilities	(7.9)	17.1	0.5
Other liabilities	20.8	(1.0)	(1.1)
Net cash provided by operating activities from continuing operations	94.0	104.1	160.4
Cash Flows Used in Investing Activities from Continuing Operations:
Capital expenditures	(38.1)	(47.2)	(71.2)
Proceeds from disposal of property and other assets	6.8	2.3	1.1
Deposits into Capital Construction Fund	(4.4)	(4.4)	(4.4)
Withdrawals from Capital Construction Fund	4.4	4.4	4.4
Acquisitions and other			(1.0)
Contribution from the Former Parent Company	25.0	40.3	43.0
Net cash used in investing activities from continuing operations	(6.3)	(4.6)	(28.1)
Cash Flows Used in Financing Activities from Continuing Operations:
Proceeds from issuance of long-term debt	197.0	109.0	58.0
Payments of long-term debt	(80.4)	(69.5)	(84.2)
Proceeds (payments) on line-of-credit agreements, net	5.0	(6.2)	17.8
Payment of financing costs	(1.9)	(0.5)
Contribution upon Separation to A&B	(155.7)
Proceeds from issuance of capital stock	25.2	10.1	6.6
Distribution to Former Parent Company for proceeds from issuance of capital stock	(21.7)
Cash assumed by A&B upon Separation	(2.5)
Payments of note to Former Parent Company			(20.0)
Distribution paid to Former Parent Company		(60.0)	(45.0)
Dividends paid	(39.5)	(53.1)	(52.2)
Net cash used in financing activities from continuing operations	(74.5)	(70.2)	(119.0)
Cash Flows from Discontinued Operations:
Cash flows used in operating activities of discontinued operations	(29.9)	(17.8)	(10.2)
Cash flows used in investing activities of discontinued operations	(18.8)	(26.1)	(58.8)
Cash flows provided by financing activities of discontinued operations	33.9	21.9	53.7
Net cash flows used in discontinued operations	(14.8)	(22.0)	(15.3)
Net (Decrease) Increase in Cash and Cash Equivalents	(1.6)	7.3	(2.0)
Cash and cash equivalents, beginning of the year	21.5	14.2	16.2
Cash and cash equivalents, end of the year	19.9	21.5	14.2
Other Cash Flow Information:
Interest paid	11.3	7.8	8.3
Income taxes paid	42.7	0.6	42.1
Other Non-cash Information:
Capital expenditures included in accounts payable and accrued liabilities	$ 4.2	$ 4.2	$ 2.1