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Stockholders' Equity (Narrative) (Details) (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended
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May 21, 2014 director | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Mar. 05, 2012 Director Compensation Policy [Member] | Jun. 30, 2014 ESPP | Jun. 30, 2013 ESPP | Jun. 30, 2014 ESPP | Jun. 30, 2013 ESPP | Jun. 30, 2014 Restricted Stock | Jun. 30, 2013 Restricted Stock | Jun. 30, 2014 Restricted Stock | Jun. 30, 2013 Restricted Stock | Jun. 30, 2014 Restricted Stock Minimum [Member] | Jun. 30, 2014 Restricted Stock Maximum [Member] | May 21, 2014 Stock Options | May 22, 2014 Stock Options | Jun. 30, 2014 Stock Options | Jun. 30, 2013 Stock Options | Jun. 30, 2014 Stock Options | Jun. 30, 2013 Stock Options | Jun. 30, 2014 Performance Shares | Mar. 03, 2014 Common Stock | Jun. 30, 2014 Common Stock | Jun. 30, 2014 Common Stock | May 21, 2014 Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation awards, options outstanding at period end (in Shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,429,421 |  | 1,429,421 |  |  |  |  |  |
Share based compensation awards, options outstanding and unvested at period end (in Shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,097,022 |  | 1,097,022 |  |  |  |  |  |
Shares purchased through Employee Stock Purchase Plan (in Shares) |  |  |  |  |  |  | 14,507 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average purchase price of ESPP shares purchased during the period (in Dollars per share) |  |  |  |  |  |  | $ 14.56 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  | $ 73,000 | $ 88,000 | $ 189,000 | $ 187,000 | $ 496,000 | $ 300,000 | $ 841,000 | $ 700,000 |  |  |  |  | $ 470,000 | $ 131,000 | $ 734,000 | $ 178,000 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  | 3 years | 5 years |  |  |  |  | 4 years |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |
Stock Granted, Value, Share-based Compensation, Net of Forfeitures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |
Share based compensation awards, vesting percentage per period (in Percent) |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  | 20.00% | 33.33% |  |  |  |  | 25.00% |  |  |  |  |  |
Unrecognized share based compensation |  |  |  |  |  |  |  |  |  |  | 5,700,000 |  | 5,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized share based compensation, expected term (in Duration) |  |  |  | 2 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance award hurdle price (in Dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 21.50 |  |  |  |
Number of days market price must exceed limit to vest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 days |  |  |  |
Term when market price must exceed limit to vest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |
Payment for Non-cash Exercise of Share-based Awards, Base Rate Per Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19.00 |  |  |  |
Payments for Non-cash Exercise of Share-based Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,100,000 |  |  |  |
Performance award purchase price option 1 (in Dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.50 |  |  |  |
Performance award purchase price option 2 (in Dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9 |  |  |  |
Directors fees approved under new Directors Compensation Policy, audit committee chair |  |  |  |  |  | 17,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy, compensation and corporate governance chair |  |  |  |  |  | 15,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy, lead director |  |  |  |  |  | 115,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy, each independent director |  |  |  |  |  | 40,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy, each independent director per regular or scheduled meeting |  |  |  |  |  | 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy, other committee members and chairs |  |  |  |  |  | 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors fees approved under new Directors Compensation Policy |  |  |  |  |  | 1,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,233
Number of Directors | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Directors compensation expense |  | 326,000 | 476,000 | 648,000 | 609,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000 | 25,000 |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17.00 | $ 17.21 |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared |  | $ 0.025 | $ 0.025 | $ 0.050 | $ 0.050 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.025 |  |  |
Dividends, Common Stock, Cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 | $ 900,000 |

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