Customer Contracts (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Gross and net amount of uncompleted contracts
Costs and estimated earnings recognized on uncompleted contracts	$ 1,435,242	$ 802,588
Billings on uncompleted contracts	1,470,674	791,663
Total	(35,432)	10,925
Shown on balance sheet as:
Costs and estimated earnings in excess of billings on uncompleted contracts	73,008	73,773
Billings on uncompleted contracts in excess of costs and estimated earnings	108,440	62,848
Total	$ (35,432)	$ 10,925