Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Fixed Assets Fixed Assets (Details) (USD $)	12 Months Ended
Fixed Assets Fixed Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 66,896,000us-gaap_PropertyPlantAndEquipmentGross	$ 60,708,000us-gaap_PropertyPlantAndEquipmentGross
Less: Accumulated depreciation	(26,836,000)	(21,440,000)
Fixed assets, net	40,060,000us-gaap_PropertyPlantAndEquipmentNet	39,268,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	5,700,000us-gaap_Depreciation	3,900,000us-gaap_Depreciation	2,900,000us-gaap_Depreciation
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	26,895,000	23,267,000
Computer software [Member]
Property, Plant and Equipment [Line Items]
Estimated life	3 years
Fixed assets, gross	3,777,000	2,237,000
Computer hardware [Member]
Property, Plant and Equipment [Line Items]
Estimated life	3 years
Fixed assets, gross	4,798,000	3,469,000
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 31,426,000	$ 31,735,000
Minimum [Member] \| Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated life	3 years
Minimum [Member] \| Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated life	5 years
Maximum [Member] \| Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated life	7 years
Maximum [Member] \| Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated life	15 years