Condensed Consolidating Financial Statements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 7,233	$ (1,384)	$ 5,904	$ (6,168)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	4,013	5,015	12,436	14,172
Deferred income taxes			3,485	3,444
Amortization of debt issue costs			1,706	1,642
Amortization of syndication contracts			556	1,297
Payments on syndication contracts			(1,369)	(1,506)
Non-cash stock-based compensation	800	500	1,763	1,359
Other income (loss)				(687)
Gain (loss) on debt extinguishment			(1,230)
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
(Increase) decrease in restricted cash				809
(Increase) decrease in accounts receivable			(3,511)	1,655
(Increase) decrease in amounts due from related party
(Increase) decrease in prepaid expenses and other assets			(1,056)	(261)
Increase (decrease) in accounts payable, accrued expenses and other liabilities			(7,466)	(11,050)
Net cash provided by (used in) operating activities			13,678	4,706
Cash flows from investing activities:
Investment in subsidiaries
Purchase of a business				(588)
Purchases of property and equipment and intangibles			(6,502)	(6,542)
Net cash provided by (used in) investing activities			(6,502)	(7,130)
Cash flows from financing activities:
Proceeds from issuance of common stock			23	42
Payments on long-term debt			(20,600)	(1,000)
Payments of deferred debt and offering costs			(80)	(29)
Net cash provided by (used in) financing activities			(20,657)	(987)
Net increase (decrease) in cash and cash equivalents			(13,481)	(3,411)
Cash and cash equivalents:
Beginning			58,719	72,390
Ending	45,238	68,979	45,238	68,979
Parent [Member]
Cash flows from operating activities:
Net income (loss)	7,233	(1,384)	5,904	(6,168)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	3,853	4,805	11,912	13,553
Deferred income taxes			760	540
Amortization of debt issue costs			1,706	1,642
Amortization of syndication contracts			556	1,297
Payments on syndication contracts			(1,369)	(1,506)
Non-cash stock-based compensation			1,763	1,359
Other income (loss)				(687)
Gain (loss) on debt extinguishment			(1,230)
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
(Increase) decrease in restricted cash				809
(Increase) decrease in accounts receivable			(3,710)	1,789
(Increase) decrease in amounts due from related party			311	929
(Increase) decrease in prepaid expenses and other assets			(1,086)	(298)
Increase (decrease) in accounts payable, accrued expenses and other liabilities			(7,175)	(10,929)
Net cash provided by (used in) operating activities			10,802	2,330
Cash flows from investing activities:
Investment in subsidiaries			3,068	2,079
Purchase of a business				(588)
Purchases of property and equipment and intangibles			(6,472)	(6,350)
Net cash provided by (used in) investing activities			(3,404)	(4,859)
Cash flows from financing activities:
Proceeds from issuance of common stock			23	42
Payments on long-term debt			(20,600)	(1,000)
Payments of deferred debt and offering costs			(80)	(29)
Net cash provided by (used in) financing activities			(20,657)	(987)
Net increase (decrease) in cash and cash equivalents			(13,259)	(3,516)
Cash and cash equivalents:
Beginning			58,276	72,140
Ending	45,017		45,017
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net income (loss)	(1,009)	(848)	(3,029)	(2,543)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization
Deferred income taxes			3,029	2,543
Amortization of debt issue costs
Amortization of syndication contracts
Payments on syndication contracts
Non-cash stock-based compensation
Other income (loss)
Gain (loss) on debt extinguishment
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
(Increase) decrease in restricted cash
(Increase) decrease in accounts receivable
(Increase) decrease in amounts due from related party
(Increase) decrease in prepaid expenses and other assets
Increase (decrease) in accounts payable, accrued expenses and other liabilities
Net cash provided by (used in) operating activities
Cash flows from investing activities:
Investment in subsidiaries
Purchase of a business
Purchases of property and equipment and intangibles
Net cash provided by (used in) investing activities
Cash flows from financing activities:
Proceeds from issuance of common stock
Payments on long-term debt
Payments of deferred debt and offering costs
Net cash provided by (used in) financing activities
Net increase (decrease) in cash and cash equivalents
Cash and cash equivalents:
Beginning
Ending
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net income (loss)	(24)	247	(39)	464
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	160	210	524	619
Deferred income taxes			(304)	361
Amortization of debt issue costs
Amortization of syndication contracts
Payments on syndication contracts
Non-cash stock-based compensation
Other income (loss)
Gain (loss) on debt extinguishment
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
(Increase) decrease in restricted cash
(Increase) decrease in accounts receivable			199	(134)
(Increase) decrease in amounts due from related party			(311)	(929)
(Increase) decrease in prepaid expenses and other assets			30	37
Increase (decrease) in accounts payable, accrued expenses and other liabilities			(291)	(121)
Net cash provided by (used in) operating activities			(192)	297
Cash flows from investing activities:
Investment in subsidiaries
Purchase of a business
Purchases of property and equipment and intangibles			(30)	(192)
Net cash provided by (used in) investing activities			(30)	(192)
Cash flows from financing activities:
Proceeds from issuance of common stock
Payments on long-term debt
Payments of deferred debt and offering costs
Net cash provided by (used in) financing activities
Net increase (decrease) in cash and cash equivalents			(222)	105
Cash and cash equivalents:
Beginning			443	250
Ending	221		221
Eliminations [Member]
Cash flows from operating activities:
Net income (loss)	1,033	601	3,068	2,079
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization
Deferred income taxes
Amortization of debt issue costs
Amortization of syndication contracts
Payments on syndication contracts
Non-cash stock-based compensation
Other income (loss)
Gain (loss) on debt extinguishment
Changes in assets and liabilities, net of effect of acquisitions and dispositions:
(Increase) decrease in restricted cash
(Increase) decrease in accounts receivable
(Increase) decrease in amounts due from related party
(Increase) decrease in prepaid expenses and other assets
Increase (decrease) in accounts payable, accrued expenses and other liabilities
Net cash provided by (used in) operating activities			3,068	2,079
Cash flows from investing activities:
Investment in subsidiaries			(3,068)	(2,079)
Purchase of a business
Purchases of property and equipment and intangibles
Net cash provided by (used in) investing activities			(3,068)	(2,079)
Cash flows from financing activities:
Proceeds from issuance of common stock
Payments on long-term debt
Payments of deferred debt and offering costs
Net cash provided by (used in) financing activities
Net increase (decrease) in cash and cash equivalents
Cash and cash equivalents:
Beginning
Ending