Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,977	$ 9,807
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of drydock costs	8,863	7,204
Amortization of intangibles and deferred financing costs	1,201	1,074
Deferred income taxes	3,782	1,461
Gain on interest rate swap contracts	(542)	(91)
Loss on extinguishment of debt (Note 14)	3,339	0
Equity compensation	435	788
Deferred drydock costs paid	(3,653)	(1,314)
Changes in operating assets and liabilities:
Accounts receivable	19,182	14,179
Prepaid expenses and other current assets	905	1,443
Accounts payable and accrued liabilities	5,220	848
Other assets and liabilities	(375)	180
Income taxes payable (net)	(53)	287
Net Cash Provided by (Used in) Operating Activities, Total	4,857	4,262
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(26,825)	(13,025)
Purchase of a vessel	0	(3,343)
Net Cash Provided by (Used in) Investing Activities, Total	(26,825)	(16,368)
CASH FLOWS FROM FINANCING ACTIVITIES
Deferred payment liability obligation	(211)	(188)
Proceeds from equity offering	0	15,400
Proceeds from long-term debt	15,298	3,153
Long-term debt repayment	(2,792)	(3,200)
Debt financing cost	(2,115)	(2,531)
Proceeds from bank indebtedness	24,015	22,027
Repayments of Lines of Credit	(12,069)	(21,427)
Net Cash Provided by (Used in) Financing Activities, Total	22,126	13,234
EFFECT OF FOREIGN EXCHANGE RATES ON CASH	(12)	(593)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	146	535
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	5,563	4,508
CASH AND CASH EQUIVALENTS, END OF PERIOD	5,709	5,043
SUPPLEMENTAL CASH FLOW DISCLOSURE
Payments for interest	4,932	4,259
Unpaid purchases of property and equipment	3,351	2,744
Unpaid purchases of deferred drydock cost	74	7
Payment of income taxes	53	12
Capitalized interest	$ 538	$ 172