Shareholders' Equity Shareholders' Equity (Details textual) (USD $)	0 Months Ended	6 Months Ended
	Jun. 07, 2014	Jun. 30, 2014	Feb. 06, 2013
Stockholders Equity Note [Line Items]
Stock Repurchased During Period, Value		$ 43,003,000
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		1,264,000
Retained Earnings
Stockholders Equity Note [Line Items]
Common stock dividends, total cash paid		$ 28,200,000