CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 8,997	$ 12,217
Accounts receivable, net	155,170	164,647
Inventories	62,774	55,389
Prepaid expenses	13,487	15,877
Deferred income taxes	10,607	10,215
Total current assets	251,035	258,345
PROPERTY AND EQUIPMENT, net	331,119	343,832
GOODWILL	23,629	23,870
OTHER INTANGIBLE ASSETS, net	10,974	11,936
OTHER ASSETS	5,359	6,660
TOTAL ASSETS	622,116	644,643
CURRENT LIABILITIES
Current portion of long-term debt	17,323	20,550
Accounts payable	87,007	83,578
Accrued liabilities	61,949	71,974
Total current liabilities	166,279	176,102
LONG-TERM DEBT, net of current portion	88,777	103,134
OTHER LIABILITIES	44,348	44,255
DEFERRED INCOME TAXES, net	40,530	42,778
Total liabilities	339,934	366,269
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, $.01 par value; 100,000,000 shares authorized; 9,637,642 and 9,633,475 issued and outstanding	96	96
Additional paid-in capital	155,399	154,657
Retained earnings	127,739	124,139
Accumulated other comprehensive loss	(1,052)	(518)
Total shareholders' equity	282,182	278,374
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 622,116	$ 644,643