Stockholders' Equity Stockholders' Equity (Narrative) (Details)	Feb. 14, 2018 USD ($)
2018 Stock Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount	$ 25,000,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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