ACQUISITIONS Pro Forma Impact of Acquisitions (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquisitions
Interest expense	$ 38,539us-gaap_InterestIncomeExpenseNet	$ 28,198us-gaap_InterestIncomeExpenseNet	$ 26,068us-gaap_InterestIncomeExpenseNet
Amortization of intangibles	(6,555)us-gaap_AmortizationOfIntangibleAssets	(6,671)us-gaap_AmortizationOfIntangibleAssets	(3,957)us-gaap_AmortizationOfIntangibleAssets
Income tax expense (benefit)	11,391us-gaap_IncomeTaxExpenseBenefit	2,523us-gaap_IncomeTaxExpenseBenefit	(7,117)us-gaap_IncomeTaxExpenseBenefit
Pro Forma \| All Current Acquirees
Acquisitions
Revenues		876,942	824,624
Net loss from continuing operations		(58,829)	(27,287)
Basic loss per common share from continuing operations		$ (0.91)	$ (0.49)
Diluted loss per common share from continuing operations		$ (0.91)	$ (0.49)
Interest expense		(3,734)	(8,613)
Amortization of intangibles		(576)	(4,094)
Income tax expense (benefit)		$ (2,785)	$ (4,357)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The net amount of operating interest income (expense).

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