Stockholders' Equity (Narrative) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 09, 2015	Dec. 04, 2013
Class of Stock [Line Items]
Common stock, shares authorized (shares)	20,000,000				20,000,000				20,000,000	20,000,000
Common stock, issued shares (shares)	11,115,779				11,115,779				11,115,779	11,115,779
Common stock, par value (usd per share)	$ 0.01				$ 0.01				$ 0.01	$ 0.01
Dividends paid per common share (usd per share)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.04	$ 0.04	$ 0.04	$ 0.00	$ 0.12	$ 0.16
Preferred stock shares authorized (shares)	5,000,000				5,000,000				5,000,000	5,000,000
Preferred stock issued (shares)	0				0				0	0
Preferred stock par value (usd per share)	$ 0				$ 0				$ 0	$ 0
Repurchased common stock (shares)									0	5,000	80,512
Purchase of common shares for treasury										$ 67,000	$ 1,587,000
Shares paid for tax withholding (shares)									7,277	20,186
Adjustments related to tax withholding									$ 103,000	$ 275,000
Cash dividends on common stock paid to shareholders									0	$ 1,244,000	$ 1,656,000
December 2013 Share Repurchase Program
Class of Stock [Line Items]
Stock repurchase program authorized amount													$ 15,000,000
December 2015 Share Repurchase Program
Class of Stock [Line Items]
Stock repurchase program authorized amount												$ 30,000,000
Shares remaining for repurchase, value	$ 29,933,000								$ 29,933,000