EQUITY (Details)			3 Months Ended		6 Months Ended
	Apr. 23, 2015 $ / shares	Sep. 18, 2014 USD ($) item $ / shares shares	Jun. 30, 2015 USD ($) $ / shares	Jun. 30, 2014 $ / shares	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)
Share Repurchases
Number of shares of common stock repurchased under stock repurchase program | shares					219,737	251,675
Value of shares of common stock repurchased under stock repurchase program					$ 4,000,000	$ 3,600,000
Additional shares of common stock surrendered under stock repurchase program | shares					1,889
Dividend
Cash dividends declared per share of common stock | $ / shares	$ 0.09		$ 0.09	$ 0.09	$ 0.18	$ 0.18
Dividends payable			$ 3,459,000		$ 3,459,000		$ 3,376,000
Total dividends declared			$ 3,300,000		$ 6,700,000
Shareholder Rights Agreement
Preferred stock purchase right dividend declared | shares		1
Number of preferred shares callable by each right | item		0.001
Preferred stock purchase right consideration | $ / shares		$ 40.00
Preferred stock purchase rights the Board may redeem per right		$ 0.001
Minimum percent of beneficial ownership of common stock acquired for preferred stock rights to become exercisable under the agreement		10.00%
Preferred stock purchase right dilutive effect on earnings | item		0
Common share amount equivalent to fraction of preferred share | shares		1.00
Voting or dividend privileges of a preferred stock purchase right | item		0