CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock at Cost	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (AOCI)	Non- Controlling Interest
Beginning balance at Dec. 31, 2009	$ 301,742	$ 39	$ (12,031)	$ 3,573,347	$ (3,351,888)	$ 71,198	$ 21,077
Beginning balance (in shares) at Dec. 31, 2009		38,796,000	(2,440,000)
Equity-based compensation related to Stock Appreciation Rights (SARs) and stock options	2,038			2,038
Equity-based compensation related to Deferred Stock Units (DSUs)	204			204
Equity-based compensation related to Restricted Stock (RS)	103			103
Issuance of DSUs and RS to directors, shares		58,000
Issuance of DSUs and RS to directors	212			212
Issuance of RS, net of forfeitures, shares		32,000
Issuance of RS, net of forfeitures	(29)			(29)
Exercise of SARs and stock options, net of surrenders, shares	180,923	553,000
Exercise of SARs and stock options, net of surrenders	117			117
Impact of redeemable noncontrolling interest accretion	(197)			(197)
Impact of incremental acquisition of Procurian	(49,658)			(38,889)		27	(10,796)
Impact of subsidiary equity transactions	(2,832)			4,092			(6,924)
Net unrealized appreciation in marketable securities and reclassification adjustments	(4,055)
Noncontrolling owners share of AOCI of consolidated subsidiaries						(1)	1
Net unrealized depreciation in marketable securities and reclassification adjustments	(71,170)					(71,170)
Net income (loss)	47,853				46,589		1,264
Other activity	46			46
Ending balance at Dec. 31, 2010	228,429	39	(12,031)	3,541,044	(3,305,299)	54	4,622
Ending balance (in shares) at Dec. 31, 2010		39,439,000	(2,440,000)
Equity-based compensation related to Stock Appreciation Rights (SARs) and stock options	2,252			2,252
Equity-based compensation related to Deferred Stock Units (DSUs)	703			703
Equity-based compensation related to Restricted Stock (RS)	851			851
Issuance of DSUs and RS to directors, shares		73,000
Issuance of DSUs and RS to directors	165			165
Issuance of RS, net of forfeitures, shares		1,178,000
Issuance of RS, net of forfeitures	(31)	1		(32)
Exercise of SARs and stock options, net of surrenders, shares	18,725	39,000
Exercise of SARs and stock options, net of surrenders	3	1		2
Impact of redeemable noncontrolling interest accretion	(509)			(509)
Impact of incremental acquisition of Procurian	(1,320)			(1,059)			(261)
Impact of subsidiary equity transactions	1,520			704			816
Repurchase of common stock, shares			(841,000)
Repurchase of common stock	(8,588)		(8,588)
Noncontrolling owners share of AOCI of consolidated subsidiaries						20	(20)
Net income (loss)	30,022				27,566		2,456
Ending balance at Dec. 31, 2011	253,497	41	(20,619)	3,544,121	(3,277,733)	74	7,613
Ending balance (in shares) at Dec. 31, 2011		40,729,000	(3,281,000)
Equity-based compensation related to Stock Appreciation Rights (SARs) and stock options	2,488			2,488
Equity-based compensation related to Deferred Stock Units (DSUs)	419			419
Equity-based compensation related to Restricted Stock (RS)	3,155			3,155
Issuance of DSUs and RS to directors, shares		74,000
Issuance of DSUs and RS to directors	107			107
Issuance of RS, net of forfeitures, shares		77,000
Issuance of RS, net of forfeitures	(188)			(188)
Exercise of SARs and stock options, net of surrenders, shares	173,208	183,000
Exercise of SARs and stock options, net of surrenders	1,003			1,003
Impact of redeemable noncontrolling interest accretion	(839)			(839)
Impact of subsidiary equity transactions, shares		1,092
Impact of subsidiary equity transactions	64,014	1		(733)		13	64,733
Repurchase of common stock, shares			(930,000)
Repurchase of common stock	(8,354)		(8,354)
Net unrealized appreciation in marketable securities and reclassification adjustments	1,552
Noncontrolling owners share of AOCI of consolidated subsidiaries						(47)	47
Net income (loss)	23,730				22,989		741
Ending balance at Dec. 31, 2012	$ 339,032	$ 42	$ (28,973)	$ 3,549,533	$ (3,254,744)	$ 40	$ 73,134
Ending balance (in shares) at Dec. 31, 2012		42,155,000	(4,211,000)