Share Repurchase Program (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accelerated Share Repurchases [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		3,000,000
Additional shares available for future repurchase		1,353,000
Stock Repurchased and Retired During Period, Shares	1,674	1,353,000	0
Stock Repurchased and Retired During Period, Value	$ 20,668	$ 12,845,000	$ 0
Stock repurchase and retired average price per share	$ 12.35	$ 9.49	$ 0.00
Document Period End Date	Dec. 31, 2015
Shares available for future repurchase	1,326,000