Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Flows From Operating Activities:
Net income	$ 4,065	$ 2,974
Adjustments to reconcile net income to net cash provided by operating activities:
Loss from discontinued operations	0	394
Loss from equity method investees	1,433	0
Stock-based compensation expense	617	620
Depreciation and amortization	6,163	4,994
Deferred income tax benefit	(2,020)	(1,818)
Loss (gain) on sales of marketable securities	(2,991)	23
Other	27	258
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(160)	2,119
Prepaid expenses and other assets	(1,802)	(1,897)
Accounts payable and other liabilities	4,526	1,139
Net cash used in operating activities of discontinued operations	0	(728)
Net cash provided by operating activities	9,858	8,078
Cash Flows From Investing Activities:
Purchases of businesses, net of cash acquired	(530)	0
Purchases of property and equipment	(3,279)	(2,347)
Proceeds from sale of property and equipment	26	0
Investments in equity method investees	0	(4,000)
Purchases of marketable securities	(51,843)	(47,192)
Sales of marketable securities	40,579	8,315
Maturities of marketable securities	0	56,045
Other investments	(3,000)	0
Net cash used in investing activities of discontinued operations	0	(112)
Net cash provided by (used in) investing activities	(18,047)	10,709
Cash Flows From Financing Activities:
Repurchases of common stock	(1,377)	(2,098)
Repayment of subordinated notes	(346)	0
Repayments of capital lease obligations	(101)	(106)
Repayments of long-term debt	(3,304)	(13,000)
Net cash used in financing activities	(5,128)	(15,204)
Net increase (decrease) in cash and cash equivalents	(13,317)	3,583
Cash and cash equivalents, beginning balance	73,602	71,556
Cash and cash equivalents, ending balance	$ 60,285	$ 75,139