Employee Benefit Plans (Details) - 401(K) [Member] - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan Disclosure [Line Items]
Company's matching percentage of employees' contribution	40.00%	40.00%	40.00%
Company's matching contribution of employees' salary	5.00%	5.00%	5.00%
Company's total contributions	$ 750,000	$ 573,000	$ 553,000
Discretionary contributions	$ 0	$ 0	$ 0

Amount of contributions made by the employer to defined benefit plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(ii)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Section 50
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Amount of discretionary contributions made by an employer to a defined contribution plan.

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