ACCOUNTS RECEIVABLE (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Accounts Receivable [Abstract]
Billed receivables	$ 473,527	$ 468,254
Billable receivables at end of period	84,784	102,963
Unbilled receivables pending receipt of contractual documents authorizing billing	57,269	43,399
Total accounts receivable, current	615,580	614,616
Unbilled receivables, retainages and fee withholdings expected to be billed beyond the next 12 months	8,714	11,330
Total accounts receivable	$ 624,294	$ 625,946