Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Bond Letter
Line of Credit Facility [Line Items]
Interest rate floor related to Susquehanna Bank agreement (in hundredths)	4.50%
Performance Bond Abstract
Number of Standby Letters of Credit	9
Number of Surety Bonds	2
Letter of Credit and Surety Bonds	$ 3.4
Number of Performance and Bid Bonds issued in relation to contracts	10
Number of stand by letters of credit deposited in escrow accounts	4
Amount of escrow accounts, which are restricted until the associated standby letters of credit have expired	1.0
First Line of Credit [Member]
Line of Credit Facility [Line Items]
Principal amount of the Susquehanna line of credit	7.5
Expiration date of credit agreements with Susquehanna Bank	Jun. 30, 2014
Minimum Cash Balance Requirement	$ 3.0
Number of consecutive quarters entity must attain positive net income	2
Minimum tangible capital base - Covenant Description	Must Exceed $26.0 million
Minimum tangible capital base - Covenant Compliance	$26.7 million
Quick ratio - Covenant Description	Must Exceed 2.00 : 1.00
Quick ratio- Covenant Compliance	2.54 : 1.00
Tangible capital base ratio - Covenant Description	Not to Exceed .75 : 1.00
Tangible capital base ratio - Covenant Compliance	.58 : 1.00