Commitments and Contingencies (Details) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Contractual Commitments, Commitment [Line Items]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 6,900,000
Operating Lease, Payments		24,743
Lease cost		23,540,000
Variable lease cost		1,017,000
Sublease income		(953,000)
Total lease costs		$ 23,857,000
Weighted average remaining lease term - operating leases (in years)		5 years 4 months 2 days
Weighted average discount rate - operating leases		4.13%
Future minimum annual lease and service payments
Total lease liability		$ 97,581,000	$ 0		$ 110,505,000
Sublease income related to operating leases			1,400,000	$ 1,100,000
Operating lease liabilities		97,581,000	0		$ 110,505,000
Clawback Obligation
Future minimum annual lease and service payments
Other Commitment			6,500,000
RCG Longview Partners II, LLC | Clawback Obligation
Future minimum annual lease and service payments
Other Commitment			6,500,000
Equipment Leases
Contractual Commitments, Commitment [Line Items]
Contractual Obligation, Due in Next Fiscal Year			2,434,000
Contractual Obligation, Due in Second Year			1,492,000
Contractual Obligation, Due in Third Year			1,382,000
Contractual Obligation, Due in Fourth Year			1,123,000
Contractual Obligation, Due in Fifth Year			374,000
Contractual Obligation, Due after Fifth Year			0
Contractual Obligation			6,805,000
Short-term lease cost		0
Future minimum annual lease and service payments
2020		360,000
2021		206,000
2022		73,000
2023		0
2024		0
Thereafter		0
Future minimum annual lease and service payments		639,000
Less discount		24,000
Total lease liability		615,000
Lessee, Operating Lease, Liability, Payments, Due		639,000
Less discount		24,000
Operating lease liabilities		615,000
Service Payments
Contractual Commitments, Commitment [Line Items]
Contractual Obligation, Due in Next Fiscal Year		22,217,000	21,758,000
Contractual Obligation, Due in Second Year		14,674,000	7,514,000
Contractual Obligation, Due in Third Year		9,358,000	1,877,000
Contractual Obligation, Due in Fourth Year		4,095,000	1,372,000
Contractual Obligation, Due in Fifth Year		1,938,000	735,000
Contractual Obligation, Due after Fifth Year		4,401,000	735,000
Contractual Obligation		56,683,000	33,991,000
Facility Leases
Contractual Commitments, Commitment [Line Items]
Contractual Obligation, Due in Next Fiscal Year			24,584,000
Contractual Obligation, Due in Second Year			22,608,000
Contractual Obligation, Due in Third Year			22,321,000
Contractual Obligation, Due in Fourth Year			19,166,000
Contractual Obligation, Due in Fifth Year			16,204,000
Contractual Obligation, Due after Fifth Year			21,478,000
Contractual Obligation			$ 126,361,000
Short-term lease cost		253,000
Future minimum annual lease and service payments
2020	[1]	22,848,000
2021	[1]	24,271,000
2022	[1]	20,766,000
2023	[1]	17,610,000
2024	[1]	14,789,000
Thereafter	[1]	10,225,000
Future minimum annual lease and service payments	[1]	110,509,000
Less discount		13,290,000
Total lease liability		96,966,000
Lessee, Operating Lease, Liability, Payments, Due	[1]	110,509,000
Less discount		13,290,000
Operating lease liabilities		$ 96,966,000

[1] The Company has entered into various agreements to sublease certain of its premises.