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Stockholders' Equity - Narrative (Details) - USD ($)	5 Months Ended	12 Months Ended
Stockholders' Equity - Narrative (Details) - USD ($)	Dec. 31, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 15, 2016	Dec. 16, 2014	Aug. 15, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of treasury shares, value		$ 2,743,000	$ 4,943,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, expiration period		10 years
Share-based payment award, number of shares available for grant (shares)		531,204
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, vesting period		1 year
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, vesting period		3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, vesting period		1 year
August 2013 Share Repurchase Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount							$ 7,013,838
Purchase of treasury shares (shares)	127,510			0
Purchase of treasury shares, value	$ 1,300,000
December 2014 Share Repurchase Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount						$ 8,000,000
Purchase of treasury shares (shares)			502,077
Purchase of treasury shares, value			$ 4,900,000
March 2016 Share Repurchase Agreement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount					$ 10,000,000.0
Purchase of treasury shares (shares)		264,058
Purchase of treasury shares, value		$ 2,700,000
Remaining authorized repurchase amount		$ 7,300,000