SEGMENT INFORMATION - General (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) segment item	Dec. 31, 2013 USD ($) item
Segment information
Number of reporting segments | segment										2
Revenues:
Operating revenue	$ 136,299	$ 131,325	$ 130,557	$ 107,755	$ 108,492	$ 103,955	$ 115,451	$ 116,220	$ 505,936	$ 444,118	$ 438,690
Reimbursable expenses									38,269	30,352	43,393
Total revenue	$ 144,632	$ 142,535	$ 138,010	$ 119,028	$ 115,137	$ 111,006	$ 125,056	$ 123,271	544,205	474,470	482,083
Segment performance measure									$ 149,072	$ 137,175	$ 138,409
As a percentage of segment operating revenue									29.00%	31.00%	32.00%
Consolidated revenue
Significant Client and Concentration Of Credit Risk
Number of significant clients | item									0	0	0
Consolidated revenue | Minimum
Significant Client and Concentration Of Credit Risk
Percentage of concentration of credit risk									10.00%	10.00%	10.00%
Consolidated accounts receivable
Significant Client and Concentration Of Credit Risk
Number of significant clients | item									0	0	0
Consolidated accounts receivable | Minimum
Significant Client and Concentration Of Credit Risk
Percentage of concentration of credit risk									10.00%	10.00%	10.00%
Technology
Revenues:
Operating revenue									$ 345,613	$ 297,679	$ 284,929
Intersegment revenue									$ 1,594	$ 2,045	$ 384
As a percentage of segment operating revenue									28.00%	28.00%	31.00%
Bankruptcy and Settlement Administration Segment
Revenues:
Operating revenue									$ 160,323	$ 146,439	$ 153,761
As a percentage of segment operating revenue									34.00%	36.00%	32.00%
Operating segment
Revenues:
Direct costs, selling, general and administrative expenses									$ 395,133	$ 337,295	$ 343,674
Operating segment | Technology
Revenues:
Operating revenue									347,207	299,724	285,313
Reimbursable expenses									2,044	2,540	2,488
Total revenue									349,251	302,264	287,801
Direct costs, selling, general and administrative expenses									254,200	218,255	198,462
Segment performance measure									95,051	84,009	89,339
Operating segment | Bankruptcy and Settlement Administration Segment
Revenues:
Operating revenue									160,323	146,439	153,761
Reimbursable expenses									36,225	27,812	40,905
Total revenue									196,548	174,251	194,666
Direct costs, selling, general and administrative expenses									142,527	121,085	145,596
Segment performance measure									54,021	53,166	49,070
Eliminations
Revenues:
Operating revenue									(1,594)	(2,045)	(384)
Intersegment revenue									(1,594)	(2,045)	(384)
Total revenue									(1,594)	(2,045)	(384)
Direct costs, selling, general and administrative expenses									$ (1,594)	$ (2,045)	$ (384)
As a percentage of segment operating revenue											0.00%