Related Party Transactions Narrative (Details) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Director Affiliated Entity [Member] ABM Industries, Inc. (ABM) [Member]	Sep. 30, 2012 Director Affiliated Entity [Member] ABM Industries, Inc. (ABM) [Member]	Sep. 30, 2013 Director Affiliated Entity [Member] ABM Industries, Inc. (ABM) [Member]	Sep. 30, 2012 Director Affiliated Entity [Member] ABM Industries, Inc. (ABM) [Member]	Sep. 30, 2013 Director [Member]	Sep. 30, 2012 Director [Member]	Sep. 30, 2013 Director [Member]	Sep. 30, 2012 Director [Member]	Sep. 30, 2013 Shareholder Affiliated Entity [Member]	Sep. 30, 2012 Shareholder Affiliated Entity [Member]	Sep. 30, 2013 Shareholder Affiliated Entity [Member]	Sep. 30, 2012 Shareholder Affiliated Entity [Member]	Oct. 31, 2013 Shareholder Affiliated Entity [Member] Subsequent Event [Member]	Sep. 30, 2013 Wife of President and CEO (Nancy K. Holst) [Member]
Related Party Transaction [Line Items]
Revenue, related parties	$ 33,000	$ 43,000	$ 103,000	$ 168,000		$ 33,000	$ 43,000	$ 103,000	$ 168,000
Accounts receivable, related parties, current	22,000		22,000		32,000	22,000		22,000
Related party transaction, amounts of transaction, monthly												12,500
Related party transaction, amounts of transaction										38,000	38,000	113,000	113,000	124,000	161,000	196,000	233,000		18,000
Accounts payable, related parties	136,000		136,000		13,000					36,000		36,000		100,000		100,000
Agreement Termination Fee, Value																		100,000
Agreement Termination Fee, Shares																		100
Due to Other Related Parties																			$ 6,000