Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Performance Bond Abstract
Number of Standby Letters of Credit	12
Number of Surety Bonds	2
Letter of Credit and Surety Bonds	$ 4.4
Number of Performance and Bid Bonds issued in relation to contracts	12
Number of stand by letters of credit deposited in escrow accounts	12
Amount of escrow accounts, which are restricted until the associated standby letters of credit have expired	4.2
Susquehanna Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Principal amount of the Susquehanna line of credit	7.5
Interest rate floor related to Susquehanna Bank agreement (in hundredths)	4.50%
Expiration date of credit agreements with Susquehanna Bank	Mar. 31, 2015
Debt Instrument, Collateral Amount	3.1
Susquehanna Bank [Member] | Revolving Credit Facility [Member] | Minimum tangible capital base [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms	Must Exceed $26.0 million
Line of Credit Facility, Covenant Compliance	$22.6 million
Susquehanna Bank [Member] | Revolving Credit Facility [Member] | Quick Ratio [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms	Must Exceed 2.00 : 1.00
Line of Credit Facility, Covenant Compliance	2.10 : 1.00
Susquehanna Bank [Member] | Revolving Credit Facility [Member] | Tangible capital base ratio [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms	Not to Exceed .75 : 1.00
Line of Credit Facility, Covenant Compliance	.69 : 1.00
Susquehanna Bank [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Segregated Cash Balance Requirement [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Collateral Amount	$ 3.0