Acquisition (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2014		Dec. 31, 2014		Dec. 31, 2013	Sep. 30, 2014		Aug. 29, 2014 lawsuit	Dec. 31, 2012
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	$ 137,683,000		$ 137,683,000		$ 105,255,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill	137,683,000		137,683,000		105,255,000
J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	32,428,000	[1]	32,428,000	[1]		50,249,000	[1]
Other intangible assets	16,291,000	[2]	16,291,000	[2]		0	[2]
Fixed assets	12,680,000	[3]	12,680,000	[3]		12,680,000	[3]
Accounts receivable	24,155,000	[4]	24,155,000	[4]		24,050,000	[4]
Other	1,102,000	[4]	1,102,000	[4]		1,224,000	[4]
Total other assets	37,937,000		37,937,000			37,954,000
Total assets acquired and goodwill	86,656,000		86,656,000			88,203,000
Accrued expenses and other	26,880,000	[4]	26,880,000	[4]		26,108,000	[4]
Contingent consideration	32,209,000	[5]	32,209,000	[5]		33,739,000	[5]
Total liabilities assumed and contingent consideration	59,089,000		59,089,000			59,847,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill	(17,821,000)	[1]
Other intangible assets	16,291,000	[2]
Fixed assets	0	[3]
Accounts receivable	105,000	[4]
Other	(122,000)	[4]
Total other assets	(17,000)
Total assets acquired and goodwill	(1,547,000)
Accrued expenses and other	772,000	[4]
Contingent consideration	(1,530,000)	[5]
Total other liabilities	(758,000)
Total liabilities assumed and contingent consideration	(758,000)
Goodwill	32,428,000	[1]	32,428,000	[1]		50,249,000	[1]
Discount rate			3.00%
Business Combination, Period After Close of Acquisition			24 months
Minimum contingent consideration potential earnout payment								0
Maximum contingent consideration potential earnout payment	50,000,000		50,000,000
Contingent consideration	32,209,000	[5]	32,209,000	[5]		33,739,000	[5]
Number of pending lawsuits								4
Revenue from acquired entity from date of acquisition			54,267,000
Net loss from acquired entity from date of acquisition			3,416,000
Acquisition costs	2,859,000		2,859,000
Retirement Services segment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	137,683,000		137,683,000		105,255,000				105,255,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill	137,683,000		137,683,000		105,255,000				105,255,000
Retirement Services segment | J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill								32,428,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Goodwill								$ 32,428,000
Noncompete agreements | J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Discount rate			14.00%
Customer relationships | J.P. Morgan Retirement Plan Services (RPS)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Discount rate			14.00%

[1] GoodwillGoodwill is calculated as the excess of the purchase price over the net assets recognized and represents the future economic benefits arising from other assets acquired and liabilities assumed that could not be individually identified (Level 3). Total goodwill resulting from the acquisition, in the amount of $32,428, is allocated to the Retirement Services segment. No portion of goodwill is expected to be deductible for tax purposes.

[2] Other Intangible Assets Other intangible assets include customer relationships and non-competition intangible assets. The fair value of the customer relationships intangible asset was determined using the excess earnings method under the income approach (Level 3). This valuation method is based on first forecasting revenue for the existing customer base and then applying expected attrition rates. The operating cash flows are calculated by determining the cost required to generate revenue from the existing customer base. Key assumptions include projections of revenues generated from existing customers which includes an estimated rate of attrition, projections of operating expenses, and a discount rate of 14%. The fair value of the non-competition intangible asset was determined using the with and without method under the income approach (Level 3). The premise associated with this valuation approach is that the value of an asset is represented by the differences in the subject business’ cash flows under scenarios where a) the asset is present and is used in operations; and b) the asset is absent and not used in operations. Such differences may arise due to additional revenue and/or cost savings associated with having the asset in place. Cash flow differentials are then discounted to present value to arrive at an estimate of fair value for the asset. Key assumptions include projected cash flows with the non-competition agreement in place, projected cash flows without the non-competition agreement in place, the expected time period under which the cash flow differences would occur, the probability of competition and success and a discount rate of 14%.

[3] Fixed AssetsThe fair value of property, plant and equipment and software was determined using a cost approach and a market approach (Level 2). The cost approach is based on current replacement cost and/or reproduction costs of the assets as new less depreciation attributable to physical, functional and economic factors. The market approach is based on market data for similar assets.

[4] Accounts receivable, other assets and accrued expenses and other liabilitiesAccounts receivable, other assets and accrued expenses and other liabilities are current assets and liabilities that are generally carried at fair value which is approximated from the carrying value (Level 2).

[5] Contingent consideration In addition to the cash paid during 2014, the Company is obligated to make an additional earnout payment based on the retention of aggregated revenue, as defined in the Purchase and Sale Agreement, 24 months after the close date. As such, the remaining earnout payment is due on August 29, 2016. The potential undiscounted amount of the earnout payment that the Company could be required to make under the contingent consideration arrangement is between zero and $50,000. The fair value of the contingent consideration of $32,209 was estimated by a discounted cash flow model (Level 3) which calculates the present value of a probability-weighted earnout using a discount rate of 3%.