CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 8,164	$ 3,710
Accounts receivable, net	166,277	171,779
Inventories	52,076	50,888
Prepaid expenses	12,639	13,447
Deferred income taxes	11,525	10,787
Total current assets	250,681	250,611
PROPERTY AND EQUIPMENT, net	391,372	388,681
GOODWILL	26,777	27,124
OTHER INTANGIBLE ASSETS, net	18,446	19,376
OTHER ASSETS	10,365	12,691
TOTAL ASSETS	697,641	698,483
CURRENT LIABILITIES
Current portion of long-term debt	16,968	15,911
Accounts payable	89,407	90,100
Accrued liabilities	77,189	81,501
Total current liabilities	183,564	187,512
LONG-TERM DEBT, net of current portion	160,433	154,161
OTHER LIABILITIES	20,701	13,820
DEFERRED INCOME TAXES, net	44,627	45,629
Total liabilities	409,325	401,122
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, $.01 par value; 100,000,000 shares authorized; 10,888,635 and 11,072,053 issued and outstanding	108	110
Additional paid-in capital	168,276	170,547
Retained earnings	117,344	123,990
Accumulated other comprehensive income	2,588	2,714
Total shareholders' equity	288,316	297,361
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 697,641	$ 698,483