|
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
|
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Common stock, par value | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 260,000,000 | 260,000,000 |
| Common stock, shares issued | 214,179,000 | 213,791,000 |
| Treasury Stock, Shares | 1,517,000 | 1,517,000 |