Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities:
Net income	$ 61.1	$ 76.4
Reconciling adjustments:
Depreciation and amortization	71.8	59.1
Deferred income taxes	24.7	31.9
Share-based compensation expense	9.2	9.6
Equity in income of related party Terminal Joint Venture	(9.2)	(13.1)
Distributions from Terminal Joint Venture		8.8
Other	2.4	1.4
Changes in assets and liabilities:
Accounts receivable	(0.1)	(11.6)
Deferred dry-docking payments	(43.7)	(14.0)
Deferred dry-docking amortization	27.8	16.8
Prepaid expenses and other assets	(34.6)	(15.2)
Accounts payable and accrued liabilities	10.7	(2.1)
Other liabilities	(32.6)	11.0
Net cash provided by operating activities	87.5	159.0
Cash Flows From Investing Activities:
Capital expenditures	(67.3)	(30.3)
Capitalized vessel construction expenditures	(39.2)
Proceeds from disposal of property and equipment	2.2	4.7
Cash deposits into Capital Construction Fund	(123.4)	(77.9)
Withdrawals from Capital Construction Fund	12.5	93.7
Payments for membership interests in Span Alaska, net of cash acquired	(112.8)
Payments for Horizon’s common stock, net of cash acquired, and other acquisitions		(29.0)
Net cash used in investing activities	(328.0)	(38.8)
Cash Flows From Financing Activities:
Repayments of debt and capital leases	(13.7)	(13.4)
Proceeds from revolving credit facility	1,275.0	557.0
Repayments of revolving credit facility	(1,080.0)	(439.0)
Payments of financing costs		(0.9)
Proceeds from issuance of debt	200.0
Repayments of Span Alaska debt	(81.9)
Repayments of Horizon debt and redemption of warrants		(467.5)
Proceeds from issuance of capital stock	0.6	1.4
Tax withholding related to net share settlements of restricted stock units	(6.8)	(2.9)
Dividends paid	(24.0)	(22.8)
Payments for shares repurchased	(37.8)
Net cash provided by (used in) financing activities	231.4	(388.1)
Net Decrease in Cash and Cash Equivalents	(9.1)	(267.9)
Cash and cash equivalents, beginning of the period	25.5	293.4
Cash and cash equivalents, end of the period	16.4	25.5
Supplemental Cash Flow Information:
Interest paid, net of capitalized interest	15.7	13.2
Income tax paid	16.2	34.2
Non-cash Information:
Capital expenditures included in accounts payable and accrued liabilities	$ 12.6	6.1
Capital lease obligations		$ 1.7