Stock Repurchase Program (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015	Nov. 30, 2012
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock	$ 154,000
Stock repurchase program, remaining amount	$ 54,900,000
Share Repurchase Program, November 2012 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount (up to)				$ 25,000,000
Repurchase of common stock during period (in shares)	0	180,190
Repurchase of common stock	$ 2,700,000
Repurchase of common stock (in dollars per share)		$ 14.71
Share Repurchase Program, June 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount (up to)			$ 50,000,000
Repurchase of common stock (in shares)	0