Condensed Consolidating Financial Statements (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidating statement of operations
Net revenue	$ 49,087	$ 46,524
Expenses:
Direct operating expenses	24,225	21,634
Selling, general and administrative expenses	7,683	9,372
Corporate expenses	4,497	3,881
Depreciation and amortization	3,955	4,347
Total expenses	40,360	39,234
Operating income (loss)	8,727	7,290
Interest expense	(7,784)	(9,100)
Interest income	7	4
Income (loss) before income taxes	950	(1,806)
Income tax benefit (expense)	(1,907)	(1,589)
Income (loss) before equity in net income (loss) of subsidiaries	(957)	(3,395)
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	(957)	(3,395)
Parent [Member]
Consolidating statement of operations
Net revenue	48,757	45,949
Expenses:
Direct operating expenses	24,374	21,520
Selling, general and administrative expenses	7,535	9,245
Corporate expenses	4,497	3,881
Depreciation and amortization	3,813	4,161
Total expenses	40,219	38,807
Operating income (loss)	8,538	7,142
Interest expense	(7,784)	(9,100)
Interest income	7	4
Income (loss) before income taxes	761	(1,954)
Income tax benefit (expense)	(14)	(496)
Income (loss) before equity in net income (loss) of subsidiaries	747	(2,450)
Equity in income (loss) of subsidiaries	(1,704)	(945)
Net income (loss) applicable to common stockholders	(957)	(3,395)
Guarantor Subsidiaries [Member]
Expenses:
Income tax benefit (expense)	(1,787)	(1,010)
Income (loss) before equity in net income (loss) of subsidiaries	(1,787)	(1,010)
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	(1,787)	(1,010)
Non-Guarantor Subsidiaries [Member]
Consolidating statement of operations
Net revenue	826	846
Expenses:
Direct operating expenses	347	385
Selling, general and administrative expenses	148	127
Depreciation and amortization	142	186
Total expenses	637	698
Operating income (loss)	189	148
Income (loss) before income taxes	189	148
Income tax benefit (expense)	(106)	(83)
Income (loss) before equity in net income (loss) of subsidiaries	83	65
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	83	65
Eliminations [Member]
Consolidating statement of operations
Net revenue	(496)	(271)
Expenses:
Direct operating expenses	(496)	(271)
Total expenses	(496)	(271)
Equity in income (loss) of subsidiaries	1,704	945
Net income (loss) applicable to common stockholders	$ 1,704	$ 945