Acquisitions Dispositions - Additional Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 120,380,000	$ 91,619,000	$ 100,497,000	$ 186,337,000	$ 122,887,000	$ 86,545,000	$ 94,146,000	$ 140,729,000	$ 498,834,000	$ 444,306,000	$ 392,502,000
Net Income (Loss) Attributable to Parent	10,097,000	3,180,000	5,134,000	17,681,000	9,683,000	3,879,000	4,356,000	14,869,000	36,092,000	32,787,000	28,863,000
BravePoint Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested									12,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal									6,700,000
DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetOfTax									4,000,000
Revenues									15,100,000	19,100,000	17,500,000
Net Income (Loss) Attributable to Parent									$ (232,000)	$ (155,000)	$ 454,000