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Operations and Summary of Significant Accounting Policies - Sales Office Closing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Amounts reclassified from accumulative other comprehensive income, net of tax	$ 0	$ 231
Restructuring Reserve [Abstract]
Balance at January 1, 2016	653
Charges	945
Cash payments	(1,561)
Balance at December 31, 2016	37	653
Cash payments	1,561
Operating Leases Obligation
Restructuring Reserve [Abstract]
Balance at January 1, 2016	0
Charges	406
Cash payments	(406)
Balance at December 31, 2016	0	0
Cash payments	406
Employee Severance Obligation
Restructuring Reserve [Abstract]
Balance at January 1, 2016	301
Charges	441
Cash payments	(742)
Balance at December 31, 2016	0	301
Cash payments	742
Other Associated Costs
Restructuring Reserve [Abstract]
Balance at January 1, 2016	352
Charges	98
Cash payments	(413)
Balance at December 31, 2016	37	$ 352
Cash payments	$ 413

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
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