CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME, USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Statement
Unrealized actuarial loss on defined benefit pension plan, net of taxes	$ 1,000,000	$ 1,000,000
Unrealized actuarial loss on defined benefit pension plan, tax	637,000	640,000
Unrealized gain (loss) on marketable securities, available-for-sale	$ 65,000	$ (123,000)