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Long-Term Debt Narrative (Details) (USD $) | 1 Months Ended |  | 1 Months Ended | 0 Months Ended | 1 Months Ended |  | 1 Months Ended | 0 Months Ended | 6 Months Ended |
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Mar. 31, 2014 | Jun. 30, 2014 | Feb. 05, 2014 2012 Credit Facility [Member] | Feb. 05, 2014 2014 Credit Facility [Member] | Mar. 31, 2014 2014 Credit Facility [Member] | Jun. 30, 2014 2014 Credit Facility [Member] | Feb. 05, 2014 Line of Credit [Member] 2012 Credit Facility [Member] 30-day LIBOR [Member] | Feb. 05, 2014 Line of Credit [Member] 2014 Credit Facility [Member] 30-day LIBOR [Member] | Feb. 05, 2014 Line of Credit [Member] 2014 Credit Facility [Member] Prime Rate [Member] | Mar. 24, 2014 6.75 senior notes due 2021 [Member] Senior Notes [Member] | Jun. 30, 2014 6.75 senior notes due 2021 [Member] Senior Notes [Member] | Mar. 31, 2014 September 2012 [Member] Notes Payable, Other Payables [Member] | Mar. 31, 2014 January 2012 [Member] Notes Payable, Other Payables [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 200,000,000 |  |  |  |  |  |  |  | $ 200,000,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 6.75% |  |  |
Proceeds from issuance of Senior Notes, net |  |  |  |  |  |  |  |  |  | 194,800,000 |  |  |
Net proceeds from Senior Note used to payoff 2014 Credit Facility |  |  |  |  |  |  |  |  |  | 153,411,000 |  |  |
Net proceeds from Senior Notes available for general corporate use |  |  |  |  |  |  |  |  |  | 41,389,000 |  |  |
Debt Issuance Cost |  |  |  |  |  |  |  |  |  |  | 5,200,000 |  |
Senior note, percentage of principal amount for redemption price prior to April 1,2017 |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Senior notes, percentage of notes redeemable with equity proceeds prior to April, 1, 2017 |  |  |  |  |  |  |  |  |  | 35.00% |  |  |
Senior note, percentage of principal amount for redemption price using equity proceeds prior to Apr. 1, 2017 |  |  |  |  |  |  |  |  |  | 106.75% |  |  |
Senior notes, percentage of principal amount required for redemption price, upon change of control |  |  |  |  |  |  |  |  |  | 101.00% |  |  |
Senior Notes, maximum number of days allowed for issue of identical new notes registered under Securities Act |  |  |  |  |  |  |  |  |  | 245 days |  |  |
Maximum borrowing capacity |  |  | 205,000,000 | 160,000,000 |  |  |  |  |  |  |  |  |
Line of credit facility expiration date |  |  | Feb. 28, 2015 | Feb. 05, 2019 |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  | 2.00% | 2.50% | 1.50% |  |  |  |
Remaining borrowing capacity |  |  |  |  |  | 160,000,000 |  |  |  |  |  |  |
Line of Credit Facility, Additional Borrowing Capacity With Lender Consent |  |  |  | 50,000,000 |  |  |  |  |  |  |  |  |
EBITDA leverage ratio requirement |  |  |  | 2.5 |  |  |  |  |  |  |  |  |
Line of credit facility, Additional permitted unsecured debt |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |
Line of credit facility, percentage of foreign subsidiary stock pledged as collateral |  |  |  | 65.00% |  |  |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage |  |  |  | 0.50% |  |  |  |  |  |  |  |  |
Proceeds from notes payable | 7,541,000 |  |  |  | 145,870,000 |  |  |  |  |  |  |  |
Notes payable |  |  |  |  |  |  |  |  |  |  |  | $ 6,134,000 | $ 1,407,000

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