Supplementary Financial Information (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplementary Financial Information (unaudited)
Total revenues	$ 121,534	$ 119,617	$ 126,910	$ 136,375	$ 129,923	$ 149,419	$ 142,617	$ 150,078	$ 504,436	$ 572,037	$ 570,754
Expenses:
Compensation and employee benefits	47,100	47,135	49,540	52,587	52,041	54,109	55,679	57,478	196,362	219,307	215,886
Transaction processing	19,965	19,336	19,649	22,223	20,632	24,840	23,104	23,026	81,173	91,602	85,387
Occupancy and equipment	16,892	16,033	15,063	14,649	15,282	14,904	15,063	14,942	62,637	60,191	59,905
Telecommunications and data processing services	15,037	15,034	14,712	15,067	13,960	14,559	14,870	15,071	59,850	58,460	53,473
Other general and administrative	21,049	21,220	23,597	22,677	22,705	23,181	22,762	22,160	88,543	90,808	94,253
Goodwill and other asset impairment			274,285		4,282		225,035		274,285	229,317	5,375
Restructuring charges	9,499				6,754		17,678		9,499	24,432	4,062
Acquisition related costs							2,523
Interest expense	562	678	624	678	625	636	494	270	2,542	2,025	671
Total expenses	130,104	119,436	397,470	127,881	136,281	132,229	377,208	132,947	774,891	778,665	521,421
(Loss) income before income tax (benefit) expense	(8,570)	181	(270,560)	8,494	(6,358)	17,190	(234,591)	17,131	(270,455)	(206,628)	49,333
Income tax (benefit) expense	(2,117)	(51)	(23,464)	3,036	(2,686)	6,713	(38,448)	7,582	(22,596)	(26,839)	25,353
Net (loss) income	$ (6,453)	$ 232	$ (247,096)	$ 5,458	$ (3,672)	$ 10,477	$ (196,143)	$ 9,549	$ (247,859)	$ (179,789)	$ 23,980
Basic (loss) earnings per share (in dollars per share)	$ (0.17)	$ 0.01	$ (6.40)	$ 0.14	$ (0.09)	$ 0.26	$ (4.77)	$ 0.23	$ (6.45)	$ (4.42)	$ 0.56
Diluted (loss) earnings per share (in dollars per share)	$ (0.17)	$ 0.01	$ (6.40)	$ 0.14	$ (0.09)	$ 0.25	$ (4.77)	$ 0.23	$ (6.45)	$ (4.42)	$ 0.55
Basic weighted average number of common shares outstanding (in shares)	38,418	38,301	38,607	39,112	39,624	40,615	41,112	41,435	38,418	40,691	42,767
Diluted weighted average number of common shares outstanding (in shares)	38,418	39,252	38,607	40,303	39,624	41,271	41,112	42,180	38,418	40,691	43,496