Shareholders' Equity Shareholders' Equity (Details textual) (USD $)	0 Months Ended	9 Months Ended
	Sep. 05, 2014	Sep. 30, 2014	Feb. 06, 2013
Stockholders Equity Note [Line Items]
Stock Repurchased During Period, Value		$ 76,624,000
Common stock authorized to be repurchased, number of shares (in shares)			25,000,000
Common stock dividends, paid per share (in dollars per share)	$ 0.10
Common Stock and Additional Paid-in Capital
Stockholders Equity Note [Line Items]
Common stock repurchased, shares		2,264,000
Retained Earnings
Stockholders Equity Note [Line Items]
Common stock dividends, total cash paid		$ 42,400,000