Summary of Significant Accounting Policies - Basic and Diluted Shares Outstanding (Details) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]
Weighted average common shares outstanding-Basic	20,717		20,301		20,670		20,224
Effect of dilutive options (in shares)	26		22		32		27
Weighted average common shares outstanding-Diluted	20,743		20,323		20,702		20,251
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	113	[1]	118	[1]	113	[1]	118	[1]

[1] The non-dilutive options were issued in 2007 and 2008.