|
Consolidated Balance Sheets Parenthetical (USD $)
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Stockholders' equity: |
|
|
| Preferred stock, par value per share |
$ 0.01 |
$ 0.01 |
| Preferred stock, shares authorized |
20,000,000 |
20,000,000 |
| Preferred stock, shares issued |
0 |
0 |
| Preferred stock, shares outstanding |
0 |
0 |
| Common stock, par value per share |
$ 0.01 |
$ 0.01 |
| Common stock, shares authorized |
300,000,000 |
300,000,000 |
| Common stock, shares issued |
62,957,000 |
62,331,000 |
| Common stock, shares outstanding |
45,400,000 |
44,774,000 |
| Treasury stock, shares at cost |
17,557,000 |
17,557,000 |