Stock-Based Compensation (Summary Of Stock-Based Awards) (Details) - 6 months ended Jun. 30, 2015 - $ / shares shares in Thousands	Total
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares outstanding, shares or units, beginning balance	109
Vested, shares or units	(70)
Forfeited, shares or units	(1)
Non-vested shares outstanding, shares or units, ending balance	38
Non-vested outstanding, weighted-average grant date fair value, beginning balance	$ 16.33
Vested, weighted-average grant date fair value	16.84
Forfeited, weighted-average grant date fair value	16.93
Non-vested outstanding, weighted-average grant date fair value, ending balance	$ 15.39
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares outstanding, shares or units, beginning balance	412
Granted, shares or units	205
Vested, shares or units	(142)
Forfeited, shares or units	(6)
Non-vested shares outstanding, shares or units, ending balance	469
Non-vested outstanding, weighted-average grant date fair value, beginning balance	$ 20.33
Granted, weighted-average grant date fair value	23.28
Vested, weighted-average grant date fair value	20.05
Forfeited, weighted-average grant date fair value	20.61
Non-vested outstanding, weighted-average grant date fair value, ending balance	$ 21.7
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares outstanding, shares or units, beginning balance	274
Granted, shares or units	76
Forfeited, shares or units	(53)
Non-vested shares outstanding, shares or units, ending balance	297
Non-vested outstanding, weighted-average grant date fair value, beginning balance	$ 18.56
Granted, weighted-average grant date fair value	23.14
Forfeited, weighted-average grant date fair value	18.57
Non-vested outstanding, weighted-average grant date fair value, ending balance	$ 19.74