Organization and Summary of Significant Accounting Policies (Earning Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Income (loss) from continuing operations, net of tax	$ 11,528	$ 13,572	$ 5,583	$ 6,976	$ 5,179	$ 59,124	$ 6,417	$ (1,586)	$ 37,659	$ 69,134	$ 44,250
Weighted-average shares									17,197,840	16,426,209	16,035,882
Effect of dilutive stock options (in shares)									570,235	564,949	701,829
Denominator for diluted earnings per share - Adjusted weighted-average shares and assumed conversions (shares)									17,768,075	16,991,158	16,737,711
Net income per basic share (in dollars per share)	$ 0.66	$ 0.79	$ 0.33	$ 0.41	$ 0.31	$ 3.60	$ 0.40	$ (0.10)	$ 2.19	$ 4.21	$ 2.76
Net income per diluted share (in dollars per share)	$ 0.64	$ 0.76	$ 0.32	$ 0.39	$ 0.30	$ 3.48	$ 0.39	$ (0.10)	$ 2.12	$ 4.07	$ 2.64
Antidilutive securities excluded from computation of earnings per share (shares)									0	68,000	0