Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities from Continuing Operations
Income From Continuing Operations	$ 9.1	$ 2.0
Reconciling adjustments:
Depreciation and amortization	17.5	18.7
Deferred income taxes	(3.5)	(0.6)
Loss on disposal of property	(0.1)	(0.1)
Post-retirement expense	0.5	1.0
Share-based compensation expense	1.3	0.8
Equity in income of terminal joint venture	(0.2)	(0.8)
Changes in assets and liabilities:
Accounts receivable	7.3	4.9
Inventory	(0.7)
Deferred dry-docking payments	(1.2)	(11.0)
Deferred dry-docking amortization	5.4	5.6
Prepaid expenses and other assets	4.9	(0.5)
Accounts payable and accrued liabilities	(1.9)	(5.4)
Other liabilities	(3.4)	(9.5)
Net cash provided by operating activities from continuing operations	35.0	5.1
Cash Flows from Investing Activities from Continuing Operations:
Capital expenditures	(6.3)	(8.5)
Proceeds from disposal of property and other assets	1.0	0.3
Deposits into Capital Construction Fund	(2.2)	(2.2)
Withdrawals from Capital Construction Fund	2.2	2.2
Acquisitions and other	(9.6)
Contribution from the Former Parent Company		12.5
Net cash (used in) provided by investing activities from continuing operations	(14.9)	4.3
Cash Flows from Financing Activities from Continuing Operations:
Proceeds from issuance of long-term debt	21.0	7.0
Payments of long-term debt	(31.2)	(2.2)
Payments on line-of-credit agreements, net	(11.0)	(3.0)
Payment on capital leases	(0.3)
(Payments) proceeds from issuance of capital stock	(1.0)	12.8
Distribution to the Former Parent Company for proceeds from issuance of capital stock		(12.8)
Dividends paid	(6.5)	(13.3)
Net cash used in financing activities from continuing operations	(29.0)	(11.5)
Cash Flows from Discontinued Operations:
Cash flows used in operating activities of discontinued operations		(25.1)
Cash flows used in investing activities of discontinued operations		(10.9)
Cash flows provided by financing activities of discontinued operations		35.1
Net cash flows used in discontinued operations		(0.9)
Net Decrease in Cash and Cash Equivalents	(8.9)	(3.0)
Cash and cash equivalents, beginning of the period	19.9	21.5
Cash and cash equivalents, end of the period	11.0	18.5
Other Cash Flow Information:
Interest paid	2.1	2.3
Other Non-cash Information:
Capital expenditures included in accounts payable and accrued liabilities	2.0	3.6
Non-cash capital lease obligations	$ 2.9