Condensed Consolidating Financial Statements (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013	Jun. 30, 2012
Consolidating statement of operations
Net revenue	$ 56,950	$ 54,491		$ 106,037	$ 101,015
Expenses:
Direct operating expenses	25,988	22,876		50,213	44,510
Selling, general and administrative expenses	7,424	9,635		15,107	19,007
Corporate expenses	4,736	4,181		9,233	8,062
Depreciation and amortization	3,820	4,076		7,775	8,423
Total expenses	41,968	40,768		82,328	80,002
Operating income (loss)	14,982	13,723		23,709	21,013
Interest expense	(7,881)	(8,959)		(15,665)	(18,059)
Interest income	9	9		16	13
Gain (loss) on debt extinguishment	(130)	(1,230)	400	(130)	(1,230)
Income (loss) before income taxes	6,980	3,543		7,930	1,737
Income tax (expense) benefit	(1,907)	(1,477)		(3,814)	(3,066)
Income (loss) before equity in net income (loss) of subsidiaries	5,073	2,066		4,116	(1,329)
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	5,073	2,066		4,116	(1,329)
Parent [Member]
Consolidating statement of operations
Net revenue	56,669	54,360		105,426	100,309
Expenses:
Direct operating expenses	26,072	22,859		50,446	44,379
Selling, general and administrative expenses	7,255	9,516		14,790	18,761
Corporate expenses	4,736	4,181		9,233	8,062
Depreciation and amortization	3,692	3,898		7,505	8,059
Total expenses	41,755	40,454		81,974	79,261
Operating income (loss)	14,914	13,906		23,452	21,048
Interest expense	(7,881)	(8,959)		(15,665)	(18,059)
Interest income	9	9		16	13
Gain (loss) on debt extinguishment	(130)	(1,230)		(130)	(1,230)
Income (loss) before income taxes	6,912	3,726		7,673	1,772
Income tax (expense) benefit	(83)	(570)		(97)	(1,066)
Income (loss) before equity in net income (loss) of subsidiaries	6,829	3,156		7,576	706
Equity in income (loss) of subsidiaries	(1,756)	(1,090)		(3,460)	(2,035)
Net income (loss) applicable to common stockholders	5,073	2,066		4,116	(1,329)
Guarantor Subsidiaries [Member]
Consolidating statement of operations
Net revenue
Expenses:
Direct operating expenses
Selling, general and administrative expenses
Corporate expenses
Depreciation and amortization
Total expenses
Operating income (loss)
Interest expense
Interest income
Gain (loss) on debt extinguishment
Income (loss) before income taxes
Income tax (expense) benefit	(1,787)	(1,010)		(3,574)	(2,020)
Income (loss) before equity in net income (loss) of subsidiaries	(1,787)	(1,010)		(3,574)	(2,020)
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	(1,787)	(1,010)		(3,574)	(2,020)
Non-Guarantor Subsidiaries [Member]
Consolidating statement of operations
Net revenue	841	496		1,667	1,342
Expenses:
Direct operating expenses	476	382		823	767
Selling, general and administrative expenses	169	119		317	246
Corporate expenses
Depreciation and amortization	128	178		270	364
Total expenses	773	679		1,410	1,377
Operating income (loss)	68	(183)		257	(35)
Interest expense
Interest income
Gain (loss) on debt extinguishment
Income (loss) before income taxes	68	(183)		257	(35)
Income tax (expense) benefit	(37)	103		(143)	20
Income (loss) before equity in net income (loss) of subsidiaries	31	(80)		114	(15)
Equity in income (loss) of subsidiaries
Net income (loss) applicable to common stockholders	31	(80)		114	(15)
Eliminations [Member]
Consolidating statement of operations
Net revenue	(560)	(365)		(1,056)	(636)
Expenses:
Direct operating expenses	(560)	(365)		(1,056)	(636)
Selling, general and administrative expenses
Corporate expenses
Depreciation and amortization
Total expenses	(560)	(365)		(1,056)	(636)
Operating income (loss)
Interest expense
Interest income
Gain (loss) on debt extinguishment
Income (loss) before income taxes
Income tax (expense) benefit
Income (loss) before equity in net income (loss) of subsidiaries
Equity in income (loss) of subsidiaries	1,756	1,090		3,460	2,035
Net income (loss) applicable to common stockholders	$ 1,756	$ 1,090		$ 3,460	$ 2,035