Commitments and Contingencies (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Lease Obligations
Net rent expense		$ 6,300,000	$ 4,900,000	$ 16,300,000	$ 15,400,000
Future minimum annual lease and service payments
Sublease income related to operating leases		200,000	$ 400,000	800,000	$ 1,700,000
Clawback Obligation
Future minimum annual lease and service payments
Contractual obligation						$ 6,200,000
RCG Longview Partners II, LLC | Clawback Obligation
Future minimum annual lease and service payments
Contractual obligation		6,200,000		6,200,000		$ 6,200,000
Equipment Leases
Future minimum annual lease and service payments
Contractual Obligation, Due in next fiscal year	[1]	877,000		877,000
Contractual Obligation, Due in Second Year	[1]	3,150,000		3,150,000
Contractual Obligation, Due in Third Year	[1]	1,280,000		1,280,000
Contractual Obligation, Due in Fourth Year	[1]	351,000		351,000
Contractual Obligation, Due in Fifth Year	[1]	320,000		320,000
Thereafter	[1]	160,000		160,000
Future minimum annual lease and service payments	[1]	6,138,000		6,138,000
Service Payments
Future minimum annual lease and service payments
Contractual Obligation, Due in next fiscal year		14,832,000		14,832,000
Contractual Obligation, Due in Second Year		19,230,000		19,230,000
Contractual Obligation, Due in Third Year		9,476,000		9,476,000
Contractual Obligation, Due in Fourth Year		1,203,000		1,203,000
Contractual Obligation, Due in Fifth Year		287,000		287,000
Thereafter		0		0
Future minimum annual lease and service payments		45,028,000		45,028,000
Facility Leases
Future minimum annual lease and service payments
Contractual Obligation, Due in next fiscal year	[2]	6,351,000		6,351,000
Contractual Obligation, Due in Second Year	[2]	25,782,000		25,782,000
Contractual Obligation, Due in Third Year	[2]	21,440,000		21,440,000
Contractual Obligation, Due in Fourth Year	[2]	17,625,000		17,625,000
Contractual Obligation, Due in Fifth Year	[2]	17,592,000		17,592,000
Thereafter	[2]	19,296,000		19,296,000
Future minimum annual lease and service payments	[2]	$ 108,086,000		$ 108,086,000

[1] Equipment Leases include the Company's commitments relating to operating and capital leases. See Note 17 for further information on the capital lease minimum payments which are included in the table.

[2] The Company has entered into various agreements to sublease certain of its premises. The Company recorded sublease income related to these leases of $0.2 million and $0.4 million for the three months ended September 30, 2017 and 2016, and $0.8 million and $1.7 million, and for the nine months ended September 30, 2017 and 2016, respectively.