CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 12,217	$ 6,065
Accounts receivable, net	164,647	162,093
Inventories	55,389	54,129
Prepaid expenses	15,877	14,976
Deferred income taxes	10,215	9,763
Total current assets	258,345	247,026
PROPERTY AND EQUIPMENT, net	343,832	377,055
GOODWILL	23,870	24,847
OTHER INTANGIBLE ASSETS, net	11,936	15,623
OTHER ASSETS	6,660	10,569
TOTAL ASSETS	644,643	675,120
CURRENT LIABILITIES
Current portion of long-term debt	20,550	23,596
Accounts payable	83,578	90,392
Accrued liabilities	71,974	68,496
Total current liabilities	176,102	182,484
LONG-TERM DEBT, net of current portion	103,134	140,150
OTHER LIABILITIES	44,255	31,523
DEFERRED INCOME TAXES, net	42,778	47,262
Total liabilities	366,269	401,419
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, $.01 par value; 100,000,000 shares authorized; 9,633,475 and 10,239,819 issued and outstanding	96	102
Additional paid-in capital	154,657	161,914
Retained earnings	124,139	109,832
Accumulated other comprehensive (loss) income	(518)	1,853
Total shareholders' equity	278,374	273,701
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 644,643	$ 675,120