Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings (loss) per share:

	December 31,
	2017			2016		2015
Net income (loss)	$	(48,635	)	$	15,413	$	17,132
Weighted average shares outstanding:
Basic	18,735			18,540		18,334
Effect of dilutive securities:
Restricted stock units	—			347		234
Performance stock units	—			151		147
Diluted	18,735			19,038		18,715
Basic earnings (loss) per share	$	(2.60	)	$	0.83	$	0.93
Diluted earnings (loss) per share	$	(2.60	)	$	0.81	$	0.92

Summary of Estimated Useful Life of Property and Equipment

Property and Equipment

Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful life of the asset or, for leasehold improvements, the shorter of the lease term or the estimated useful life of the asset, as follows:    

Office furniture, fixtures and equipment	5–10 years
Computer equipment and software	3–7 years

Leasehold improvements are depreciated over the lesser of the lease term or life of the asset improvement, which typically range from three to ten years.

Depreciation is calculated for tax purposes using accelerated methods, where applicable.