Employee Benefit Plans (Details) - USD ($)		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Multiemployer Pension Plans
Total contributions made		$ 54,990	$ 30,369	$ 24,465
Contributions to other multiemployer plans		$ 22,282	$ 11,639	7,754
Joint Pension Fund Local Union One Six Four Ibew [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	[1]	22-6031199/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 3,026	$ 2,955	3,943
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Boilermaker-Blacksmith National Pension Trust [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description	[2]	Described below (2)
Multiemployer Pension Plans
EIN/Pension Plan Number		48-6168020/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 8,330	$ 3,271	2,882
Surcharge Imposed		No
Joint Pension Fund Local Union Number One Zero Two [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	[3]	22-1615726/001
Pension Protection Act Zone Status		Green	Green
FIP/RP Status Pending or Implemented		NA
Total contributions made		$ 2,395	$ 2,381	2,387
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		Jun. 01, 2018
IBEW Local Four Five Six Pension Plan [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number	[4]	22-6238995/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 788	$ 940	2,384
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Local 351 IBEW Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number	[5]	22-3417366/001
Multiemployer Plans, Certified Zone Status, Description		Described below (5)	Described below (5)
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,608	$ 2,218	2,281
Multiemployer Plan, Surcharge		Described below (5)
Expiration Date of Collective-Bargaining Agreement		Sep. 27, 2016
Steamfitters Local Union Number Four Two Zero Pension Plan [Member] [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number		23-2004424/001
Pension Protection Act Zone Status		Red	Red
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 937	$ 1,677	1,622
Surcharge Imposed		Yes
Expiration Date of Collective-Bargaining Agreement		Apr. 30, 2017
IBEW Local Union Nine Eight Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		23-1990722/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,768	$ 1,380	1,212
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 01, 2016
Indiana Laborers Pension Fund [Domain]
Multiemployer Pension Plans
EIN/Pension Plan Number		35-6027150/001
Pension Protection Act Zone Status		Red	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 2,519	$ 1,268	0
Surcharge Imposed		Yes
Expiration Date of Collective-Bargaining Agreement		May 31, 2017
Ironworkers Mid-America Pension Plan [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		36-6488227/001
Pension Protection Act Zone Status		Green	Green
Total contributions made		$ 2,605	$ 1,156	0
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2019
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		51-6015925/001
Pension Protection Act Zone Status		Yellow	Yellow
FIP/RP Status Pending or Implemented		Implemented
Total contributions made		$ 4,473	$ 535	0
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		Jun. 15, 2017
Pipefitters Retirement Fund Local Five Nine Seven [Member]
Multiemployer Pension Plans
EIN/Pension Plan Number		62-6105084/001
Pension Protection Act Zone Status		Green	Green
Total contributions made		$ 2,259	$ 949	$ 0
Surcharge Imposed		No
Expiration Date of Collective-Bargaining Agreement		May 31, 2017

[1] Our contributions for the Joint Pension Fund Local Union 164 IBEW exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.

[2] Our collective bargaining agreements with the Boilermaker-Blacksmith National Pension Trust are under a National Maintenance Agreement platform which is evergreen in terms of expiration. However, the agreements allow for termination of the collective bargaining agreement by either party with a predetermined written notice.

[3] Our contributions for the Joint Pension Fund of Local Union 102 exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.

[4] Our contributions for the IBEW Local 456 Pension Plan exceeded 5% of total contributions for the 2013 calendar plan year. This information was not available for the 2014 calendar plan year.

[5] For the Local 351 IBEW Pension Plan, the Company has not received a funding notification that covers the Company's fiscal years 2014 or 2015 during the preparation of this Form 10-K. Under Federal pension law, if a multiemployer pension plan is determined to be in critical or endangered status, the plan must provide notice of this status to participants, beneficiaries, the bargaining parties, the Pension Benefit Guaranty Corporation, and the Department of Labor. The Company also observed that the Local 351 IBEW Pension Plan has not submitted any Critical or Endangered Status Notices to the Department of Labor for either calendar years 2014 or 2015 (which can be accessed at http://www.dol.gov/ebsa/criticalstatusnotices.html).