Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 3,095	$ 3,329
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of drydock costs	4,367	3,530
Amortization of intangibles and deferred financing costs	654	512
Deferred income taxes	2,054	474
Gain on interest rate swap contracts	(270)	(45)
Equity compensation	416	769
Deferred drydock costs paid	(3,601)	(1,264)
Changes in operating assets and liabilities:
Accounts receivable	(20,208)	(18,009)
Prepaid expenses and other current assets	(939)	(1,120)
Accounts payable and accrued liabilities	6,770	3,938
Other assets and liabilities	168	(330)
Income taxes payable (net)	(44)	39
Net Cash Provided by (Used in) Operating Activities, Total	(7,538)	(8,177)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(14,666)	(10,265)
Net Cash Provided by (Used in) Investing Activities, Total	(14,666)	(10,265)
CASH FLOWS FROM FINANCING ACTIVITIES
Deferred payment liability obligation	(105)	(89)
Long-term debt repayment	(2,787)	(1,225)
Debt financing cost	(78)	(2,003)
Proceeds from bank indebtedness	24,015	22,027
Net Cash Provided by (Used in) Financing Activities, Total	21,045	18,710
EFFECT OF FOREIGN EXCHANGE RATES ON CASH	(247)	(14)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(1,406)	254
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	5,563	4,508
CASH AND CASH EQUIVALENTS, END OF PERIOD	4,157	4,762
SUPPLEMENTAL CASH FLOW DISCLOSURE
Payments for interest	2,346	2,164
Unpaid purchases of property and equipment	2,964	3,752
Unpaid purchases of deferred drydock cost	200	21
Payment of income taxes	44	7
Capitalized interest		$ 172