Stockholders' Equity - (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 30, 2018	Oct. 31, 2017	Dec. 31, 2015
Class of Stock [Line Items]
Authorized amount for share repurchase program					$ 40,000,000.0
Authorized amount for share repurchase program, reduction	$ 30,000,000
Number of shares authorized to be repurchased (in shares)	2,000,000
Options outstanding (in shares)	52,783	126,680	170,253			288,383
Stock Options
Class of Stock [Line Items]
Shares repurchased during the period (in shares)			61,980
Shares repurchased during the period			$ 1,200,000
Stock repurchased during period, net cash value			$ 1,500,000
Restricted Stock and Restricted Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	1,143,205	1,428,878	1,501,021			1,275,707
Through The Open Market Repurchase Program
Class of Stock [Line Items]
Shares repurchased during the period (in shares)	949,464	1,599,093	2,226,875
Shares repurchased during the period	$ 20,300,000	$ 35,300,000	$ 41,800,000
Average cost per share (in Dollars per share)	$ 21.36	$ 22.10	$ 18.76
In Connection with Equity Compensation Programs
Class of Stock [Line Items]
Authorized amount for share repurchase program	$ 10,000,000
Shares repurchased during the period (in shares)	228,068	112,899	61,039
Shares repurchased during the period	$ 5,500,000	$ 2,500,000	$ 1,200,000
Average cost per share (in Dollars per share)	$ 24.08	$ 22.15	$ 19.65
Amended Credit Facility
Class of Stock [Line Items]
Authorized amount for share repurchase program	$ 32,000,000
2016 Employee Plan
Class of Stock [Line Items]
Number of shares authorized to be repurchased (in shares)				1,700,000
Common stock available for equity-based compensation awards (in shares)	2,749,367
2013 Employee Plan | Stock Options
Class of Stock [Line Items]
Stock awards outstanding (in shares)	0
2013 Employee Plan | Restricted Stock and Restricted Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	412,327
2009 Employee Plan
Class of Stock [Line Items]
Options outstanding (in shares)	52,783
2009 Employee Plan | Restricted Stock and Restricted Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	0
2016 Director Plan
Class of Stock [Line Items]
Common stock available for equity-based compensation awards (in shares)	71,580
2011 Director Plan | Deferred Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	91,058
2006 Director Plan | Deferred Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	46,841
2001 Director Plan | Deferred Stock Units
Class of Stock [Line Items]
Stock awards outstanding (in shares)	54,575